PHP7.27: MySqlhelper class
程序员文章站
2022-03-25 16:09:30
https://github.com/ThingEngineer/PHP-MySQLi-Database-Class https://github.com/wildantea/php-pdo-mysql-helper-class MysqliDb.php sql code: test.php ......
https://github.com/ThingEngineer/PHP-MySQLi-Database-Class
https://github.com/wildantea/php-pdo-mysql-helper-class
MysqliDb.php
<?php
/**
* MysqliDb Class
*
* @category Database Access
* @package MysqliDb
* @author Jeffery Way <jeffrey@jeffrey-way.com>
* @author Josh Campbell <jcampbell@ajillion.com>
* @author Alexander V. Butenko <a.butenka@gmail.com>
* @copyright Copyright (c) 2010-2017
* @license http://opensource.org/licenses/gpl-3.0.html GNU Public License
* @link http://github.com/joshcam/PHP-MySQLi-Database-Class
@link https://github.com/ThingEngineer/PHP-MySQLi-Database-Class
* @version 2.9.2
*/
class MysqliDb
{
/**
* Static instance of self
* @var MysqliDb
*/
protected static $_instance;
/**
* Table prefix
* @var string
*/
public static $prefix = '';
/**
* MySQLi instances
* @var mysqli[]
*/
protected $_mysqli = array();
/**
* The SQL query to be prepared and executed
* @var string
*/
protected $_query;
/**
* The previously executed SQL query
* @var string
*/
protected $_lastQuery;
/**
* The SQL query options required after SELECT, INSERT, UPDATE or DELETE
* @var array
*/
protected $_queryOptions = array();
/**
* An array that holds where joins
* @var array
*/
protected $_join = array();
/**
* An array that holds where conditions
* @var array
*/
protected $_where = array();
/**
* An array that holds where join ands
*
* @var array
*/
protected $_joinAnd = array();
/**
* An array that holds having conditions
* @var array
*/
protected $_having = array();
/**
* Dynamic type list for order by condition value
* @var array
*/
protected $_orderBy = array();
/**
* Dynamic type list for group by condition value
* @var array
*/
protected $_groupBy = array();
/**
* Dynamic type list for tempromary locking tables.
* @var array
*/
protected $_tableLocks = array();
/**
* Variable which holds the current table lock method.
* @var string
*/
protected $_tableLockMethod = "READ";
/**
* Dynamic array that holds a combination of where condition/table data value types and parameter references
* @var array
*/
protected $_bindParams = array(''); // Create the empty 0 index
/**
* Variable which holds an amount of returned rows during get/getOne/select queries
* @var string
*/
public $count = 0;
/**
* Variable which holds an amount of returned rows during get/getOne/select queries with withTotalCount()
* @var string
*/
public $totalCount = 0;
/**
* Variable which holds last statement error
* @var string
*/
protected $_stmtError;
/**
* Variable which holds last statement error code
* @var int
*/
protected $_stmtErrno;
/**
* Is Subquery object
* @var bool
*/
protected $isSubQuery = false;
/**
* Name of the auto increment column
* @var int
*/
protected $_lastInsertId = null;
/**
* Column names for update when using onDuplicate method
* @var array
*/
protected $_updateColumns = null;
/**
* Return type: 'array' to return results as array, 'object' as object
* 'json' as json string
* @var string
*/
public $returnType = 'array';
/**
* Should join() results be nested by table
* @var bool
*/
protected $_nestJoin = false;
/**
* Table name (with prefix, if used)
* @var string
*/
private $_tableName = '';
/**
* FOR UPDATE flag
* @var bool
*/
protected $_forUpdate = false;
/**
* LOCK IN SHARE MODE flag
* @var bool
*/
protected $_lockInShareMode = false;
/**
* Key field for Map()'ed result array
* @var string
*/
protected $_mapKey = null;
/**
* Variables for query execution tracing
*/
protected $traceStartQ;
protected $traceEnabled;
protected $traceStripPrefix;
public $trace = array();
/**
* Per page limit for pagination
*
* @var int
*/
public $pageLimit = 20;
/**
* Variable that holds total pages count of last paginate() query
*
* @var int
*/
public $totalPages = 0;
/**
* @var array connections settings [profile_name=>[same_as_contruct_args]]
*/
protected $connectionsSettings = array();
/**
* @var string the name of a default (main) mysqli connection
*/
public $defConnectionName = 'default';
public $autoReconnect = true;
protected $autoReconnectCount = 0;
/**
* @var bool Operations in transaction indicator
*/
protected $_transaction_in_progress = false;
/**
* @param string $host
* @param string $username
* @param string $password
* @param string $db
* @param int $port
* @param string $charset
* @param string $socket
*/
public function __construct($host = null, $username = null, $password = null, $db = null, $port = null, $charset = 'utf8', $socket = null)
{
$isSubQuery = false;
// if params were passed as array
if (is_array($host)) {
foreach ($host as $key => $val) {
$$key = $val;
}
}
$this->addConnection('default', array(
'host' => $host,
'username' => $username,
'password' => $password,
'db' => $db,
'port' => $port,
'socket' => $socket,
'charset' => $charset
));
if ($isSubQuery) {
$this->isSubQuery = true;
return;
}
if (isset($prefix)) {
$this->setPrefix($prefix);
}
self::$_instance = $this;
}
/**
* A method to connect to the database
*
* @param null|string $connectionName
* @throws Exception
* @return void
*/
public function connect($connectionName = 'default')
{
if(!isset($this->connectionsSettings[$connectionName]))
throw new Exception('Connection profile not set');
$pro = $this->connectionsSettings[$connectionName];
$params = array_values($pro);
$charset = array_pop($params);
if ($this->isSubQuery) {
return;
}
if (empty($pro['host']) && empty($pro['socket'])) {
throw new Exception('MySQL host or socket is not set');
}
$mysqlic = new ReflectionClass('mysqli');
$mysqli = $mysqlic->newInstanceArgs($params);
if ($mysqli->connect_error) {
throw new Exception('Connect Error ' . $mysqli->connect_errno . ': ' . $mysqli->connect_error, $mysqli->connect_errno);
}
if (!empty($charset)) {
$mysqli->set_charset($charset);
}
$this->_mysqli[$connectionName] = $mysqli;
}
public function disconnectAll()
{
foreach (array_keys($this->_mysqli) as $k) {
$this->disconnect($k);
}
}
/**
* Set the connection name to use in the next query
* @param string $name
* @return $this
* @throws Exception
*/
public function connection($name)
{
if (!isset($this->connectionsSettings[$name]))
throw new Exception('Connection ' . $name . ' was not added.');
$this->defConnectionName = $name;
return $this;
}
/**
* A method to disconnect from the database
*
* @params string $connection connection name to disconnect
* @throws Exception
* @return void
*/
public function disconnect($connection = 'default')
{
if (!isset($this->_mysqli[$connection]))
return;
$this->_mysqli[$connection]->close();
unset($this->_mysqli[$connection]);
}
/**
* Create & store at _mysqli new mysqli instance
* @param string $name
* @param array $params
* @return $this
*/
public function addConnection($name, array $params)
{
$this->connectionsSettings[$name] = array();
foreach (array('host', 'username', 'password', 'db', 'port', 'socket', 'charset') as $k) {
$prm = isset($params[$k]) ? $params[$k] : null;
if ($k == 'host') {
if (is_object($prm))
$this->_mysqli[$name] = $prm;
if (!is_string($prm))
$prm = null;
}
$this->connectionsSettings[$name][$k] = $prm;
}
return $this;
}
/**
* A method to get mysqli object or create it in case needed
*
* @return mysqli
*/
public function mysqli()
{
if (!isset($this->_mysqli[$this->defConnectionName])) {
$this->connect($this->defConnectionName);
}
return $this->_mysqli[$this->defConnectionName];
}
/**
* A method of returning the static instance to allow access to the
* instantiated object from within another class.
* Inheriting this class would require reloading connection info.
*
* @uses $db = MySqliDb::getInstance();
*
* @return MysqliDb Returns the current instance.
*/
public static function getInstance()
{
return self::$_instance;
}
/**
* Reset states after an execution
*
* @return MysqliDb Returns the current instance.
*/
protected function reset()
{
if ($this->traceEnabled) {
$this->trace[] = array($this->_lastQuery, (microtime(true) - $this->traceStartQ), $this->_traceGetCaller());
}
$this->_where = array();
$this->_having = array();
$this->_join = array();
$this->_joinAnd = array();
$this->_orderBy = array();
$this->_groupBy = array();
$this->_bindParams = array(''); // Create the empty 0 index
$this->_query = null;
$this->_queryOptions = array();
$this->returnType = 'array';
$this->_nestJoin = false;
$this->_forUpdate = false;
$this->_lockInShareMode = false;
$this->_tableName = '';
$this->_lastInsertId = null;
$this->_updateColumns = null;
$this->_mapKey = null;
if(!$this->_transaction_in_progress ) {
$this->defConnectionName = 'default';
}
$this->autoReconnectCount = 0;
return $this;
}
/**
* Helper function to create dbObject with JSON return type
*
* @return MysqliDb
*/
public function jsonBuilder()
{
$this->returnType = 'json';
return $this;
}
/**
* Helper function to create dbObject with array return type
* Added for consistency as thats default output type
*
* @return MysqliDb
*/
public function arrayBuilder()
{
$this->returnType = 'array';
return $this;
}
/**
* Helper function to create dbObject with object return type.
*
* @return MysqliDb
*/
public function objectBuilder()
{
$this->returnType = 'object';
return $this;
}
/**
* Method to set a prefix
*
* @param string $prefix Contains a tableprefix
*
* @return MysqliDb
*/
public function setPrefix($prefix = '')
{
self::$prefix = $prefix;
return $this;
}
/**
* Pushes a unprepared statement to the mysqli stack.
* WARNING: Use with caution.
* This method does not escape strings by default so make sure you'll never use it in production.
*
* @author Jonas Barascu
* @param [[Type]] $query [[Description]]
*/
private function queryUnprepared($query)
{
// Execute query
$stmt = $this->mysqli()->query($query);
// Failed?
if ($stmt !== false)
return $stmt;
if ($this->mysqli()->errno === 2006 && $this->autoReconnect === true && $this->autoReconnectCount === 0) {
$this->connect($this->defConnectionName);
$this->autoReconnectCount++;
return $this->queryUnprepared($query);
}
throw new Exception(sprintf('Unprepared Query Failed, ERRNO: %u (%s)', $this->mysqli()->errno, $this->mysqli()->error), $this->mysqli()->errno);
}
/**
* Execute raw SQL query.
*
* @param string $query User-provided query to execute.
* @param array $bindParams Variables array to bind to the SQL statement.
*
* @return array Contains the returned rows from the query.
*/
public function rawQuery($query, $bindParams = null)
{
$params = array(''); // Create the empty 0 index
$this->_query = $query;
$stmt = $this->_prepareQuery();
if (is_array($bindParams) === true) {
foreach ($bindParams as $prop => $val) {
$params[0] .= $this->_determineType($val);
array_push($params, $bindParams[$prop]);
}
call_user_func_array(array($stmt, 'bind_param'), $this->refValues($params));
}
$stmt->execute();
$this->count = $stmt->affected_rows;
$this->_stmtError = $stmt->error;
$this->_stmtErrno = $stmt->errno;
$this->_lastQuery = $this->replacePlaceHolders($this->_query, $params);
$res = $this->_dynamicBindResults($stmt);
$this->reset();
return $res;
}
/**
* Helper function to execute raw SQL query and return only 1 row of results.
* Note that function do not add 'limit 1' to the query by itself
* Same idea as getOne()
*
* @param string $query User-provided query to execute.
* @param array $bindParams Variables array to bind to the SQL statement.
*
* @return array|null Contains the returned row from the query.
*/
public function rawQueryOne($query, $bindParams = null)
{
$res = $this->rawQuery($query, $bindParams);
if (is_array($res) && isset($res[0])) {
return $res[0];
}
return null;
}
/**
* Helper function to execute raw SQL query and return only 1 column of results.
* If 'limit 1' will be found, then string will be returned instead of array
* Same idea as getValue()
*
* @param string $query User-provided query to execute.
* @param array $bindParams Variables array to bind to the SQL statement.
*
* @return mixed Contains the returned rows from the query.
*/
public function rawQueryValue($query, $bindParams = null)
{
$res = $this->rawQuery($query, $bindParams);
if (!$res) {
return null;
}
$limit = preg_match('/limit\s+1;?$/i', $query);
$key = key($res[0]);
if (isset($res[0][$key]) && $limit == true) {
return $res[0][$key];
}
$newRes = Array();
for ($i = 0; $i < $this->count; $i++) {
$newRes[] = $res[$i][$key];
}
return $newRes;
}
/**
* A method to perform select query
*
* @param string $query Contains a user-provided select query.
* @param int|array $numRows Array to define SQL limit in format Array ($offset, $count)
*
* @return array Contains the returned rows from the query.
*/
public function query($query, $numRows = null)
{
$this->_query = $query;
$stmt = $this->_buildQuery($numRows);
$stmt->execute();
$this->_stmtError = $stmt->error;
$this->_stmtErrno = $stmt->errno;
$res = $this->_dynamicBindResults($stmt);
$this->reset();
return $res;
}
/**
* This method allows you to specify multiple (method chaining optional) options for SQL queries.
*
* @uses $MySqliDb->setQueryOption('name');
*
* @param string|array $options The optons name of the query.
*
* @throws Exception
* @return MysqliDb
*/
public function setQueryOption($options)
{
$allowedOptions = Array('ALL', 'DISTINCT', 'DISTINCTROW', 'HIGH_PRIORITY', 'STRAIGHT_JOIN', 'SQL_SMALL_RESULT',
'SQL_BIG_RESULT', 'SQL_BUFFER_RESULT', 'SQL_CACHE', 'SQL_NO_CACHE', 'SQL_CALC_FOUND_ROWS',
'LOW_PRIORITY', 'IGNORE', 'QUICK', 'MYSQLI_NESTJOIN', 'FOR UPDATE', 'LOCK IN SHARE MODE');
if (!is_array($options)) {
$options = Array($options);
}
foreach ($options as $option) {
$option = strtoupper($option);
if (!in_array($option, $allowedOptions)) {
throw new Exception('Wrong query option: ' . $option);
}
if ($option == 'MYSQLI_NESTJOIN') {
$this->_nestJoin = true;
} elseif ($option == 'FOR UPDATE') {
$this->_forUpdate = true;
} elseif ($option == 'LOCK IN SHARE MODE') {
$this->_lockInShareMode = true;
} else {
$this->_queryOptions[] = $option;
}
}
return $this;
}
/**
* Function to enable SQL_CALC_FOUND_ROWS in the get queries
*
* @return MysqliDb
*/
public function withTotalCount()
{
$this->setQueryOption('SQL_CALC_FOUND_ROWS');
return $this;
}
/**
* A convenient SELECT * function.
*
* @param string $tableName The name of the database table to work with.
* @param int|array $numRows Array to define SQL limit in format Array ($offset, $count)
* or only $count
* @param string $columns Desired columns
*
* @return array Contains the returned rows from the select query.
*/
public function get($tableName, $numRows = null, $columns = '*')
{
if (empty($columns)) {
$columns = '*';
}
$column = is_array($columns) ? implode(', ', $columns) : $columns;
if (strpos($tableName, '.') === false) {
$this->_tableName = self::$prefix . $tableName;
} else {
$this->_tableName = $tableName;
}
$this->_query = 'SELECT ' . implode(' ', $this->_queryOptions) . ' ' .
$column . " FROM " . $this->_tableName;
$stmt = $this->_buildQuery($numRows);
if ($this->isSubQuery) {
return $this;
}
$stmt->execute();
$this->_stmtError = $stmt->error;
$this->_stmtErrno = $stmt->errno;
$res = $this->_dynamicBindResults($stmt);
$this->reset();
return $res;
}
/**
* A convenient SELECT * function to get one record.
*
* @param string $tableName The name of the database table to work with.
* @param string $columns Desired columns
*
* @return array Contains the returned rows from the select query.
*/
public function getOne($tableName, $columns = '*')
{
$res = $this->get($tableName, 1, $columns);
if ($res instanceof MysqliDb) {
return $res;
} elseif (is_array($res) && isset($res[0])) {
return $res[0];
} elseif ($res) {
return $res;
}
return null;
}
/**
* A convenient SELECT COLUMN function to get a single column value from one row
*
* @param string $tableName The name of the database table to work with.
* @param string $column The desired column
* @param int $limit Limit of rows to select. Use null for unlimited..1 by default
*
* @return mixed Contains the value of a returned column / array of values
*/
public function getValue($tableName, $column, $limit = 1)
{
$res = $this->ArrayBuilder()->get($tableName, $limit, "{$column} AS retval");
if (!$res) {
return null;
}
if ($limit == 1) {
if (isset($res[0]["retval"])) {
return $res[0]["retval"];
}
return null;
}
$newRes = Array();
for ($i = 0; $i < $this->count; $i++) {
$newRes[] = $res[$i]['retval'];
}
return $newRes;
}
/**
* Insert method to add new row
*
* @param string $tableName The name of the table.
* @param array $insertData Data containing information for inserting into the DB.
*
* @return bool Boolean indicating whether the insert query was completed succesfully.
*/
public function insert($tableName, $insertData)
{
return $this->_buildInsert($tableName, $insertData, 'INSERT');
}
/**
* Insert method to add several rows at once
*
* @param string $tableName The name of the table.
* @param array $multiInsertData Two-dimensinal Data-array containing information for inserting into the DB.
* @param array $dataKeys Optinal Table Key names, if not set in insertDataSet.
*
* @return bool|array Boolean indicating the insertion failed (false), else return id-array ([int])
*/
public function insertMulti($tableName, array $multiInsertData, array $dataKeys = null)
{
// only auto-commit our inserts, if no transaction is currently running
$autoCommit = (isset($this->_transaction_in_progress) ? !$this->_transaction_in_progress : true);
$ids = array();
if($autoCommit) {
$this->startTransaction();
}
foreach ($multiInsertData as $insertData) {
if($dataKeys !== null) {
// apply column-names if given, else assume they're already given in the data
$insertData = array_combine($dataKeys, $insertData);
}
$id = $this->insert($tableName, $insertData);
if(!$id) {
if($autoCommit) {
$this->rollback();
}
return false;
}
$ids[] = $id;
}
if($autoCommit) {
$this->commit();
}
return $ids;
}
/**
* Replace method to add new row
*
* @param string $tableName The name of the table.
* @param array $insertData Data containing information for inserting into the DB.
*
* @return bool Boolean indicating whether the insert query was completed succesfully.
*/
public function replace($tableName, $insertData)
{
return $this->_buildInsert($tableName, $insertData, 'REPLACE');
}
/**
* A convenient function that returns TRUE if exists at least an element that
* satisfy the where condition specified calling the "where" method before this one.
*
* @param string $tableName The name of the database table to work with.
*
* @return bool
*/
public function has($tableName)
{
$this->getOne($tableName, '1');
return $this->count >= 1;
}
/**
* Update query. Be sure to first call the "where" method.
*
* @param string $tableName The name of the database table to work with.
* @param array $tableData Array of data to update the desired row.
* @param int $numRows Limit on the number of rows that can be updated.
*
* @return bool
*/
public function update($tableName, $tableData, $numRows = null)
{
if ($this->isSubQuery) {
return;
}
$this->_query = "UPDATE " . self::$prefix . $tableName;
$stmt = $this->_buildQuery($numRows, $tableData);
$status = $stmt->execute();
$this->reset();
$this->_stmtError = $stmt->error;
$this->_stmtErrno = $stmt->errno;
$this->count = $stmt->affected_rows;
return $status;
}
/**
* Delete query. Call the "where" method first.
*
* @param string $tableName The name of the database table to work with.
* @param int|array $numRows Array to define SQL limit in format Array ($offset, $count)
* or only $count
*
* @return bool Indicates success. 0 or 1.
*/
public function delete($tableName, $numRows = null)
{
if ($this->isSubQuery) {
return;
}
$table = self::$prefix . $tableName;
if (count($this->_join)) {
$this->_query = "DELETE " . preg_replace('/.* (.*)/', '$1', $table) . " FROM " . $table;
} else {
$this->_query = "DELETE FROM " . $table;
}
$stmt = $this->_buildQuery($numRows);
$stmt->execute();
$this->_stmtError = $stmt->error;
$this->_stmtErrno = $stmt->errno;
$this->reset();
return ($stmt->affected_rows > -1); // affected_rows returns 0 if nothing matched where statement, or required updating, -1 if error
}
/**
* This method allows you to specify multiple (method chaining optional) AND WHERE statements for SQL queries.
*
* @uses $MySqliDb->where('id', 7)->where('title', 'MyTitle');
*
* @param string $whereProp The name of the database field.
* @param mixed $whereValue The value of the database field.
* @param string $operator Comparison operator. Default is =
* @param string $cond Condition of where statement (OR, AND)
*
* @return MysqliDb
*/
public function where($whereProp, $whereValue = 'DBNULL', $operator = '=', $cond = 'AND')
{
// forkaround for an old operation api
if (is_array($whereValue) && ($key = key($whereValue)) != "0") {
$operator = $key;
$whereValue = $whereValue[$key];
}
if (count($this->_where) == 0) {
$cond = '';
}
$this->_where[] = array($cond, $whereProp, $operator, $whereValue);
return $this;
}
/**
* This function store update column's name and column name of the
* autoincrement column
*
* @param array $updateColumns Variable with values
* @param string $lastInsertId Variable value
*
* @return MysqliDb
*/
public function onDuplicate($updateColumns, $lastInsertId = null)
{
$this->_lastInsertId = $lastInsertId;
$this->_updateColumns = $updateColumns;
return $this;
}
/**
* This method allows you to specify multiple (method chaining optional) OR WHERE statements for SQL queries.
*
* @uses $MySqliDb->orWhere('id', 7)->orWhere('title', 'MyTitle');
*
* @param string $whereProp The name of the database field.
* @param mixed $whereValue The value of the database field.
* @param string $operator Comparison operator. Default is =
*
* @return MysqliDb
*/
public function orWhere($whereProp, $whereValue = 'DBNULL', $operator = '=')
{
return $this->where($whereProp, $whereValue, $operator, 'OR');
}
/**
* This method allows you to specify multiple (method chaining optional) AND HAVING statements for SQL queries.
*
* @uses $MySqliDb->having('SUM(tags) > 10')
*
* @param string $havingProp The name of the database field.
* @param mixed $havingValue The value of the database field.
* @param string $operator Comparison operator. Default is =
*
* @return MysqliDb
*/
public function having($havingProp, $havingValue = 'DBNULL', $operator = '=', $cond = 'AND')
{
// forkaround for an old operation api
if (is_array($havingValue) && ($key = key($havingValue)) != "0") {
$operator = $key;
$havingValue = $havingValue[$key];
}
if (count($this->_having) == 0) {
$cond = '';
}
$this->_having[] = array($cond, $havingProp, $operator, $havingValue);
return $this;
}
/**
* This method allows you to specify multiple (method chaining optional) OR HAVING statements for SQL queries.
*
* @uses $MySqliDb->orHaving('SUM(tags) > 10')
*
* @param string $havingProp The name of the database field.
* @param mixed $havingValue The value of the database field.
* @param string $operator Comparison operator. Default is =
*
* @return MysqliDb
*/
public function orHaving($havingProp, $havingValue = null, $operator = null)
{
return $this->having($havingProp, $havingValue, $operator, 'OR');
}
/**
* This method allows you to concatenate joins for the final SQL statement.
*
* @uses $MySqliDb->join('table1', 'field1 <> field2', 'LEFT')
*
* @param string $joinTable The name of the table.
* @param string $joinCondition the condition.
* @param string $joinType 'LEFT', 'INNER' etc.
*
* @throws Exception
* @return MysqliDb
*/
public function join($joinTable, $joinCondition, $joinType = '')
{
$allowedTypes = array('LEFT', 'RIGHT', 'OUTER', 'INNER', 'LEFT OUTER', 'RIGHT OUTER', 'NATURAL');
$joinType = strtoupper(trim($joinType));
if ($joinType && !in_array($joinType, $allowedTypes)) {
throw new Exception('Wrong JOIN type: ' . $joinType);
}
if (!is_object($joinTable)) {
$joinTable = self::$prefix . $joinTable;
}
$this->_join[] = Array($joinType, $joinTable, $joinCondition);
return $this;
}
/**
* This is a basic method which allows you to import raw .CSV data into a table
* Please check out http://dev.mysql.com/doc/refman/5.7/en/load-data.html for a valid .csv file.
* @author Jonas Barascu (Noneatme)
* @param string $importTable The database table where the data will be imported into.
* @param string $importFile The file to be imported. Please use double backslashes \\ and make sure you
* @param string $importSettings An Array defining the import settings as described in the README.md
* @return boolean
*/
public function loadData($importTable, $importFile, $importSettings = null)
{
// We have to check if the file exists
if(!file_exists($importFile)) {
// Throw an exception
throw new Exception("importCSV -> importFile ".$importFile." does not exists!");
return;
}
// Define the default values
// We will merge it later
$settings = Array("fieldChar" => ';', "lineChar" => PHP_EOL, "linesToIgnore" => 1);
// Check the import settings
if(gettype($importSettings) == "array") {
// Merge the default array with the custom one
$settings = array_merge($settings, $importSettings);
}
// Add the prefix to the import table
$table = self::$prefix . $importTable;
// Add 1 more slash to every slash so maria will interpret it as a path
$importFile = str_replace("\\", "\\\\", $importFile);
// Switch between LOAD DATA and LOAD DATA LOCAL
$loadDataLocal = isset($settings["loadDataLocal"]) ? 'LOCAL' : '';
// Build SQL Syntax
$sqlSyntax = sprintf('LOAD DATA %s INFILE \'%s\' INTO TABLE %s',
$loadDataLocal, $importFile, $table);
// FIELDS
$sqlSyntax .= sprintf(' FIELDS TERMINATED BY \'%s\'', $settings["fieldChar"]);
if(isset($settings["fieldEnclosure"])) {
$sqlSyntax .= sprintf(' ENCLOSED BY \'%s\'', $settings["fieldEnclosure"]);
}
// LINES
$sqlSyntax .= sprintf(' LINES TERMINATED BY \'%s\'', $settings["lineChar"]);
if(isset($settings["lineStarting"])) {
$sqlSyntax .= sprintf(' STARTING BY \'%s\'', $settings["lineStarting"]);
}
// IGNORE LINES
$sqlSyntax .= sprintf(' IGNORE %d LINES', $settings["linesToIgnore"]);
// Exceute the query unprepared because LOAD DATA only works with unprepared statements.
$result = $this->queryUnprepared($sqlSyntax);
// Are there rows modified?
// Let the user know if the import failed / succeeded
return (bool) $result;
}
/**
* This method is usefull for importing XML files into a specific table.
* Check out the LOAD XML syntax for your MySQL server.
*
* @author Jonas Barascu
* @param string $importTable The table in which the data will be imported to.
* @param string $importFile The file which contains the .XML data.
* @param string $importSettings An Array defining the import settings as described in the README.md
*
* @return boolean Returns true if the import succeeded, false if it failed.
*/
public function loadXml($importTable, $importFile, $importSettings = null)
{
// We have to check if the file exists
if(!file_exists($importFile)) {
// Does not exists
throw new Exception("loadXml: Import file does not exists");
return;
}
// Create default values
$settings = Array("linesToIgnore" => 0);
// Check the import settings
if(gettype($importSettings) == "array") {
$settings = array_merge($settings, $importSettings);
}
// Add the prefix to the import table
$table = self::$prefix . $importTable;
// Add 1 more slash to every slash so maria will interpret it as a path
$importFile = str_replace("\\", "\\\\", $importFile);
// Build SQL Syntax
$sqlSyntax = sprintf('LOAD XML INFILE \'%s\' INTO TABLE %s',
$importFile, $table);
// FIELDS
if(isset($settings["rowTag"])) {
$sqlSyntax .= sprintf(' ROWS IDENTIFIED BY \'%s\'', $settings["rowTag"]);
}
// IGNORE LINES
$sqlSyntax .= sprintf(' IGNORE %d LINES', $settings["linesToIgnore"]);
// Exceute the query unprepared because LOAD XML only works with unprepared statements.
$result = $this->queryUnprepared($sqlSyntax);
// Are there rows modified?
// Let the user know if the import failed / succeeded
return (bool) $result;
}
/**
* This method allows you to specify multiple (method chaining optional) ORDER BY statements for SQL queries.
*
* @uses $MySqliDb->orderBy('id', 'desc')->orderBy('name', 'desc', '^[a-z]')->orderBy('name', 'desc');
*
* @param string $orderByField The name of the database field.
* @param string $orderByDirection Order direction.
* @param mixed $customFieldsOrRegExp Array with fieldset for ORDER BY FIELD() ordering or string with regular expresion for ORDER BY REGEXP ordering
*
* @throws Exception
* @return MysqliDb
*/
public function orderBy($orderByField, $orderbyDirection = "DESC", $customFieldsOrRegExp = null)
{
$allowedDirection = Array("ASC", "DESC");
$orderbyDirection = strtoupper(trim($orderbyDirection));
$orderByField = preg_replace("/[^ -a-z0-9\.\(\),_`\*\'\"]+/i", '', $orderByField);
// Add table prefix to orderByField if needed.
//FIXME: We are adding prefix only if table is enclosed into `` to distinguish aliases
// from table names
$orderByField = preg_replace('/(\`)([`a-zA-Z0-9_]*\.)/', '\1' . self::$prefix . '\2', $orderByField);
if (empty($orderbyDirection) || !in_array($orderbyDirection, $allowedDirection)) {
throw new Exception('Wrong order direction: ' . $orderbyDirection);
}
if (is_array($customFieldsOrRegExp)) {
foreach ($customFieldsOrRegExp as $key => $value) {
$customFieldsOrRegExp[$key] = preg_replace("/[^-a-z0-9\.\(\),_` ]+/i", '', $value);
}
$orderByField = 'FIELD (' . $orderByField . ', "' . implode('","', $customFieldsOrRegExp) . '")';
}elseif(is_string($customFieldsOrRegExp)){
$orderByField = $orderByField . " REGEXP '" . $customFieldsOrRegExp . "'";
}elseif($customFieldsOrRegExp !== null){
throw new Exception('Wrong custom field or Regular Expression: ' . $customFieldsOrRegExp);
}
$this->_orderBy[$orderByField] = $orderbyDirection;
return $this;
}
/**
* This method allows you to specify multiple (method chaining optional) GROUP BY statements for SQL queries.
*
* @uses $MySqliDb->groupBy('name');
*
* @param string $groupByField The name of the database field.
*
* @return MysqliDb
*/
public function groupBy($groupByField)
{
$groupByField = preg_replace("/[^-a-z0-9\.\(\),_\* <>=!]+/i", '', $groupByField);
$this->_groupBy[] = $groupByField;
return $this;
}
/**
* This method sets the current table lock method.
*
* @author Jonas Barascu
* @param string $method The table lock method. Can be READ or WRITE.
*
* @throws Exception
* @return MysqliDb
*/
public function setLockMethod($method)
{
// Switch the uppercase string
switch(strtoupper($method)) {
// Is it READ or WRITE?
case "READ" || "WRITE":
// Succeed
$this->_tableLockMethod = $method;
break;
default:
// Else throw an exception
throw new Exception("Bad lock type: Can be either READ or WRITE");
break;
}
return $this;
}
/**
* Locks a table for R/W action.
*
* @author Jonas Barascu
* @param string $table The table to be locked. Can be a table or a view.
*
* @throws Exception
* @return MysqliDb if succeeeded;
*/
public function lock($table)
{
// Main Query
$this->_query = "LOCK TABLES";
// Is the table an array?
if(gettype($table) == "array") {
// Loop trough it and attach it to the query
foreach($table as $key => $value) {
if(gettype($value) == "string") {
if($key > 0) {
$this->_query .= ",";
}
$this->_query .= " ".self::$prefix.$value." ".$this->_tableLockMethod;
}
}
}
else{
// Build the table prefix
$table = self::$prefix . $table;
// Build the query
$this->_query = "LOCK TABLES ".$table." ".$this->_tableLockMethod;
}
// Exceute the query unprepared because LOCK only works with unprepared statements.
$result = $this->queryUnprepared($this->_query);
$errno = $this->mysqli()->errno;
// Reset the query
$this->reset();
// Are there rows modified?
if($result) {
// Return true
// We can't return ourself because if one table gets locked, all other ones get unlocked!
return true;
}
// Something went wrong
else {
throw new Exception("Locking of table ".$table." failed", $errno);
}
// Return the success value
return false;
}
/**
* Unlocks all tables in a database.
* Also commits transactions.
*
* @author Jonas Barascu
* @return MysqliDb
*/
public function unlock()
{
// Build the query
$this->_query = "UNLOCK TABLES";
// Exceute the query unprepared because UNLOCK and LOCK only works with unprepared statements.
$result = $this->queryUnprepared($this->_query);
$errno = $this->mysqli()->errno;
// Reset the query
$this->reset();
// Are there rows modified?
if($result) {
// return self
return $this;
}
// Something went wrong
else {
throw new Exception("Unlocking of tables failed", $errno);
}
// Return self
return $this;
}
/**
* This methods returns the ID of the last inserted item
*
* @return int The last inserted item ID.
*/
public function getInsertId()
{
return $this->mysqli()->insert_id;
}
/**
* Escape harmful characters which might affect a query.
*
* @param string $str The string to escape.
*
* @return string The escaped string.
*/
public function escape($str)
{
return $this->mysqli()->real_escape_string($str);
}
/**
* Method to call mysqli->ping() to keep unused connections open on
* long-running scripts, or to reconnect timed out connections (if php.ini has
* global mysqli.reconnect set to true). Can't do this directly using object
* since _mysqli is protected.
*
* @return bool True if connection is up
*/
public function ping()
{
return $this->mysqli()->ping();
}
/**
* This method is needed for prepared statements. They require
* the data type of the field to be bound with "i" s", etc.
* This function takes the input, determines what type it is,
* and then updates the param_type.
*
* @param mixed $item Input to determine the type.
*
* @return string The joined parameter types.
*/
protected function _determineType($item)
{
switch (gettype($item)) {
case 'NULL':
case 'string':
return 's';
break;
case 'boolean':
case 'integer':
return 'i';
break;
case 'blob':
return 'b';
break;
case 'double':
return 'd';
break;
}
return '';
}
/**
* Helper function to add variables into bind parameters array
*
* @param string Variable value
*/
protected function _bindParam($value)
{
$this->_bindParams[0] .= $this->_determineType($value);
array_push($this->_bindParams, $value);
}
/**
* Helper function to add variables into bind parameters array in bulk
*
* @param array $values Variable with values
*/
protected function _bindParams($values)
{
foreach ($values as $value) {
$this->_bindParam($value);
}
}
/**
* Helper function to add variables into bind parameters array and will return
* its SQL part of the query according to operator in ' $operator ?' or
* ' $operator ($subquery) ' formats
*
* @param string $operator
* @param mixed $value Variable with values
*
* @return string
*/
protected function _buildPair($operator, $value)
{
if (!is_object($value)) {
$this->_bindParam($value);
return ' ' . $operator . ' ? ';
}
$subQuery = $value->getSubQuery();
$this->_bindParams($subQuery['params']);
return " " . $operator . " (" . $subQuery['query'] . ") " . $subQuery['alias'];
}
/**
* Internal function to build and execute INSERT/REPLACE calls
*
* @param string $tableName The name of the table.
* @param array $insertData Data containing information for inserting into the DB.
* @param string $operation Type of operation (INSERT, REPLACE)
*
* @return bool Boolean indicating whether the insert query was completed succesfully.
*/
private function _buildInsert($tableName, $insertData, $operation)
{
if ($this->isSubQuery) {
return;
}
$this->_query = $operation . " " . implode(' ', $this->_queryOptions) . " INTO " . self::$prefix . $tableName;
$stmt = $this->_buildQuery(null, $insertData);
$status = $stmt->execute();
$this->_stmtError = $stmt->error;
$this->_stmtErrno = $stmt->errno;
$haveOnDuplicate = !empty ($this->_updateColumns);
$this->reset();
$this->count = $stmt->affected_rows;
if ($stmt->affected_rows < 1) {
// in case of onDuplicate() usage, if no rows were inserted
if ($status && $haveOnDuplicate) {
return true;
}
return false;
}
if ($stmt->insert_id > 0) {
return $stmt->insert_id;
}
return true;
}
/**
* Abstraction method that will compile the WHERE statement,
* any passed update data, and the desired rows.
* It then builds the SQL query.
*
* @param int|array $numRows Array to define SQL limit in format Array ($offset, $count)
* or only $count
* @param array $tableData Should contain an array of data for updating the database.
*
* @return mysqli_stmt Returns the $stmt object.
*/
protected function _buildQuery($numRows = null, $tableData = null)
{
// $this->_buildJoinOld();
$this->_buildJoin();
$this->_buildInsertQuery($tableData);
$this->_buildCondition('WHERE', $this->_where);
$this->_buildGroupBy();
$this->_buildCondition('HAVING', $this->_having);
$this->_buildOrderBy();
$this->_buildLimit($numRows);
$this->_buildOnDuplicate($tableData);
if ($this->_forUpdate) {
$this->_query .= ' FOR UPDATE';
}
if ($this->_lockInShareMode) {
$this->_query .= ' LOCK IN SHARE MODE';
}
$this->_lastQuery = $this->replacePlaceHolders($this->_query, $this->_bindParams);
if ($this->isSubQuery) {
return;
}
// Prepare query
$stmt = $this->_prepareQuery();
// Bind parameters to statement if any
if (count($this->_bindParams) > 1) {
call_user_func_array(array($stmt, 'bind_param'), $this->refValues($this->_bindParams));
}
return $stmt;
}
/**
* This helper method takes care of prepared statements' "bind_result method
* , when the number of variables to pass is unknown.
*
* @param mysqli_stmt $stmt Equal to the prepared statement object.
*
* @return array The results of the SQL fetch.
*/
protected function _dynamicBindResults(mysqli_stmt $stmt)
{
$parameters = array();
$results = array();
/**
* @see http://php.net/manual/en/mysqli-result.fetch-fields.php
*/
$mysqlLongType = 252;
$shouldStoreResult = false;
$meta = $stmt->result_metadata();
// if $meta is false yet sqlstate is true, there's no sql error but the query is
// most likely an update/insert/delete which doesn't produce any results
if (!$meta && $stmt->sqlstate)
return array();
$row = array();
while ($field = $meta->fetch_field()) {
if ($field->type == $mysqlLongType) {
$shouldStoreResult = true;
}
if ($this->_nestJoin && $field->table != $this->_tableName) {
$field->table = substr($field->table, strlen(self::$prefix));
$row[$field->table][$field->name] = null;
$parameters[] = & $row[$field->table][$field->name];
} else {
$row[$field->name] = null;
$parameters[] = & $row[$field->name];
}
}
// avoid out of memory bug in php 5.2 and 5.3. Mysqli allocates lot of memory for long*
// and blob* types. So to avoid out of memory issues store_result is used
// https://github.com/joshcam/PHP-MySQLi-Database-Class/pull/119
if ($shouldStoreResult) {
$stmt->store_result();
}
call_user_func_array(array($stmt, 'bind_result'), $parameters);
$this->totalCount = 0;
$this->count = 0;
while ($stmt->fetch()) {
if ($this->returnType == 'object') {
$result = new stdClass ();
foreach ($row as $key => $val) {
if (is_array($val)) {
$result->$key = new stdClass ();
foreach ($val as $k => $v) {
$result->$key->$k = $v;
}
} else {
$result->$key = $val;
}
}
} else {
$result = array();
foreach ($row as $key => $val) {
if (is_array($val)) {
foreach ($val as $k => $v) {
$result[$key][$k] = $v;
}
} else {
$result[$key] = $val;
}
}
}
$this->count++;
if ($this->_mapKey) {
$results[$row[$this->_mapKey]] = count($row) > 2 ? $result : end($result);
} else {
array_push($results, $result);
}
}
if ($shouldStoreResult) {
$stmt->free_result();
}
$stmt->close();
// stored procedures sometimes can return more then 1 resultset
if ($this->mysqli()->more_results()) {
$this->mysqli()->next_result();
}
if (in_array('SQL_CALC_FOUND_ROWS', $this->_queryOptions)) {
$stmt = $this->mysqli()->query('SELECT FOUND_ROWS()');
$totalCount = $stmt->fetch_row();
$this->totalCount = $totalCount[0];
}
if ($this->returnType == 'json') {
return json_encode($results);
}
return $results;
}
/**
* Abstraction method that will build an JOIN part of the query
*
* @return void
*/
protected function _buildJoinOld()
{
if (empty($this->_join)) {
return;
}
foreach ($this->_join as $data) {
list ($joinType, $joinTable, $joinCondition) = $data;
if (is_object($joinTable)) {
$joinStr = $this->_buildPair("", $joinTable);
} else {
$joinStr = $joinTable;
}
$this->_query .= " " . $joinType . " JOIN " . $joinStr .
(false !== stripos($joinCondition, 'using') ? " " : " on ")
. $joinCondition;
}
}
/**
* Insert/Update query helper
*
* @param array $tableData
* @param array $tableColumns
* @param bool $isInsert INSERT operation flag
*
* @throws Exception
*/
public function _buildDataPairs($tableData, $tableColumns, $isInsert)
{
foreach ($tableColumns as $column) {
$value = $tableData[$column];
if (!$isInsert) {
if(strpos($column,'.')===false) {
$this->_query .= "`" . $column . "` = ";
} else {
$this->_query .= str_replace('.','.`',$column) . "` = ";
}
}
// Subquery value
if ($value instanceof MysqliDb) {
$this->_query .= $this->_buildPair("", $value) . ", ";
continue;
}
// Simple value
if (!is_array($value)) {
$this->_bindParam($value);
$this->_query .= '?, ';
continue;
}
// Function value
$key = key($value);
$val = $value[$key];
switch ($key) {
case '[I]':
$this->_query .= $column . $val . ", ";
break;
case '[F]':
$this->_query .= $val[0] . ", ";
if (!empty($val[1])) {
$this->_bindParams($val[1]);
}
break;
case '[N]':
if ($val == null) {
$this->_query .= "!" . $column . ", ";
} else {
$this->_query .= "!" . $val . ", ";
}
break;
default:
throw new Exception("Wrong operation");
}
}
$this->_query = rtrim($this->_query, ', ');
}
/**
* Helper function to add variables into the query statement
*
* @param array $tableData Variable with values
*/
protected function _buildOnDuplicate($tableData)
{
if (is_array($this->_updateColumns) && !empty($this->_updateColumns)) {
$this->_query .= " ON DUPLICATE KEY UPDATE ";
if ($this->_lastInsertId) {
$this->_query .= $this->_lastInsertId . "=LAST_INSERT_ID (" . $this->_lastInsertId . "), ";
}
foreach ($this->_updateColumns as $key => $val) {
// skip all params without a value
if (is_numeric($key)) {
$this->_updateColumns[$val] = '';
unset($this->_updateColumns[$key]);
} else {
$tableData[$key] = $val;
}
}
$this->_buildDataPairs($tableData, array_keys($this->_updateColumns), false);
}
}
/**
* Abstraction method that will build an INSERT or UPDATE part of the query
*
* @param array $tableData
*/
protected function _buildInsertQuery($tableData)
{
if (!is_array($tableData)) {
return;
}
$isInsert = preg_match('/^[INSERT|REPLACE]/', $this->_query);
$dataColumns = array_keys($tableData);
if ($isInsert) {
if (isset ($dataColumns[0]))
$this->_query .= ' (`' . implode($dataColumns, '`, `') . '`) ';
$this->_query .= ' VALUES (';
} else {
$this->_query .= " SET ";
}
$this->_buildDataPairs($tableData, $dataColumns, $isInsert);
if ($isInsert) {
$this->_query .= ')';
}
}
/**
* Abstraction method that will build the part of the WHERE conditions
*
* @param string $operator
* @param array $conditions
*/
protected function _buildCondition($operator, &$conditions)
{
if (empty($conditions)) {
return;
}
//Prepare the where portion of the query
$this->_query .= ' ' . $operator;
foreach ($conditions as $cond) {
list ($concat, $varName, $operator, $val) = $cond;
$this->_query .= " " . $concat . " " . $varName;
switch (strtolower($operator)) {
case 'not in':
case 'in':
$comparison = ' ' . $operator . ' (';
if (is_object($val)) {
$comparison .= $this->_buildPair("", $val);
} else {
foreach ($val as $v) {
$comparison .= ' ?,';
$this->_bindParam($v);
}
}
$this->_query .= rtrim($comparison, ',') . ' ) ';
break;
case 'not between':
case 'between':
$this->_query .= " $operator ? AND ? ";
$this->_bindParams($val);
break;
case 'not exists':
case 'exists':
$this->_query.= $operator . $this->_buildPair("", $val);
break;
default:
if (is_array($val)) {
$this->_bindParams($val);
} elseif ($val === null) {
$this->_query .= ' ' . $operator . " NULL";
} elseif ($val != 'DBNULL' || $val == '0') {
$this->_query .= $this->_buildPair($operator, $val);
}
}
}
}
/**
* Abstraction method that will build the GROUP BY part of the WHERE statement
*
* @return void
*/
protected function _buildGroupBy()
{
if (empty($this->_groupBy)) {
return;
}
$this->_query .= " GROUP BY ";
foreach ($this->_groupBy as $key => $value) {
$this->_query .= $value . ", ";
}
$this->_query = rtrim($this->_query, ', ') . " ";
}
/**
* Abstraction method that will build the LIMIT part of the WHERE statement
*
* @return void
*/
protected function _buildOrderBy()
{
if (empty($this->_orderBy)) {
return;
}
$this->_query .= " ORDER BY ";
foreach ($this->_orderBy as $prop => $value) {
if (strtolower(str_replace(" ", "", $prop)) == 'rand()') {
$this->_query .= "rand(), ";
} else {
$this->_query .= $prop . " " . $value . ", ";
}
}
$this->_query = rtrim($this->_query, ', ') . " ";
}
/**
* Abstraction method that will build the LIMIT part of the WHERE statement
*
* @param int|array $numRows Array to define SQL limit in format Array ($offset, $count)
* or only $count
*
* @return void
*/
protected function _buildLimit($numRows)
{
if (!isset($numRows)) {
return;
}
if (is_array($numRows)) {
$this->_query .= ' LIMIT ' . (int) $numRows[0] . ', ' . (int) $numRows[1];
} else {
$this->_query .= ' LIMIT ' . (int) $numRows;
}
}
/**
* Method attempts to prepare the SQL query
* and throws an error if there was a problem.
*
* @return mysqli_stmt
* @throws Exception
*/
protected function _prepareQuery()
{
$stmt = $this->mysqli()->prepare($this->_query);
if ($stmt !== false) {
if ($this->traceEnabled)
$this->traceStartQ = microtime(true);
return $stmt;
}
if ($this->mysqli()->errno === 2006 && $this->autoReconnect === true && $this->autoReconnectCount === 0) {
$this->connect($this->defConnectionName);
$this->autoReconnectCount++;
return $this->_prepareQuery();
}
$error = $this->mysqli()->error;
$query = $this->_query;
$errno = $this->mysqli()->errno;
$this->reset();
throw new Exception(sprintf('%s query: %s', $error, $query), $errno);
}
/**
* Referenced data array is required by mysqli since PHP 5.3+
*
* @param array $arr
*
* @return array
*/
protected function refValues(array &$arr)
{
//Reference in the function arguments are required for HHVM to work
//https://github.com/facebook/hhvm/issues/5155
//Referenced data array is required by mysqli since PHP 5.3+
if (strnatcmp(phpversion(), '5.3') >= 0) {
$refs = array();
foreach ($arr as $key => $value) {
$refs[$key] = & $arr[$key];
}
return $refs;
}
return $arr;
}
/**
* Function to replace ? with variables from bind variable
*
* @param string $str
* @param array $vals
*
* @return string
*/
protected function replacePlaceHolders($str, $vals)
{
$i = 1;
$newStr = "";
if (empty($vals)) {
return $str;
}
while ($pos = strpos($str, "?")) {
$val = $vals[$i++];
if (is_object($val)) {
$val = '[object]';
}
if ($val === null) {
$val = 'NULL';
}
$newStr .= substr($str, 0, $pos) . "'" . $val . "'";
$str = substr($str, $pos + 1);
}
$newStr .= $str;
return $newStr;
}
/**
* Method returns last executed query
*
* @return string
*/
public function getLastQuery()
{
return $this->_lastQuery;
}
/**
* Method returns mysql error
*
* @return string
*/
public function getLastError()
{
if (!isset($this->_mysqli[$this->defConnectionName])) {
return "mysqli is null";
}
return trim($this->_stmtError . " " . $this->mysqli()->error);
}
/**
* Method returns mysql error code
* @return int
*/
public function getLastErrno () {
return $this->_stmtErrno;
}
/**
* Mostly internal method to get query and its params out of subquery object
* after get() and getAll()
*
* @return array
*/
public function getSubQuery()
{
if (!$this->isSubQuery) {
return null;
}
array_shift($this->_bindParams);
$val = Array('query' => $this->_query,
'params' => $this->_bindParams,
'alias' => isset($this->connectionsSettings[$this->defConnectionName]) ? $this->connectionsSettings[$this->defConnectionName]['host'] : null
);
$this->reset();
return $val;
}
/* Helper functions */
/**
* Method returns generated interval function as a string
*
* @param string $diff interval in the formats:
* "1", "-1d" or "- 1 day" -- For interval - 1 day
* Supported intervals [s]econd, [m]inute, [h]hour, [d]day, [M]onth, [Y]ear
* Default null;
* @param string $func Initial date
*
* @return string
* @throws Exception
*/
public function interval($diff, $func = "NOW()")
{
$types = Array("s" => "second", "m" => "minute", "h" => "hour", "d" => "day", "M" => "month", "Y" => "year");
$incr = '+';
$items = '';
$type = 'd';
if ($diff && preg_match('/([+-]?) ?([0-9]+) ?([a-zA-Z]?)/', $diff, $matches)) {
if (!empty($matches[1])) {
$incr = $matches[1];
}
if (!empty($matches[2])) {
$items = $matches[2];
}
if (!empty($matches[3])) {
$type = $matches[3];
}
if (!in_array($type, array_keys($types))) {
throw new Exception("invalid interval type in '{$diff}'");
}
$func .= " " . $incr . " interval " . $items . " " . $types[$type] . " ";
}
return $func;
}
/**
* Method returns generated interval function as an insert/update function
*
* @param string $diff interval in the formats:
* "1", "-1d" or "- 1 day" -- For interval - 1 day
* Supported intervals [s]econd, [m]inute, [h]hour, [d]day, [M]onth, [Y]ear
* Default null;
* @param string $func Initial date
*
* @return array
*/
public function now($diff = null, $func = "NOW()")
{
return a
赞 (0)
打赏
微信扫一扫
相关文章:
-
-
WIFI的最新方法破解手段！黑客破解仅需十秒！走到哪都能连WIFI！
近日，中国知名黑客安全组织东方联盟研究人员透露了一种新的WiFi黑客技术，使黑客更容易破解大多数现代路由器的WiFi密码，并且攻破只需要10秒，速度... [阅读全文] -
Delphi 字符串转日期，强大到窒息，VarToDateTime 解决了 困扰很久的小问题
尤其是在进行数据库语句操作时，对于字符串的来源不确定因素太多，有了该函数用起来真的很方便。举例如下： 用VarToDateTime构建一个新的函数S... [阅读全文] -
微服务背后的大理念是将大型、复杂且历时长久的应用在架构上设计为内聚的服务，这些服务能够随着时间的流逝而演化。本文主要介绍了利用 Java 生态系统构... [阅读全文]
-
c/c++ 类成员变量，成员函数的存储方式，以及this指针在c++中的作用
c/c++ 类成员变量，成员函数的存储方式，以及this指针在c++中的作用 c++不会像上图那样为每一个对象的成员变量和成员函数开辟内存空间， 而... [阅读全文] -
版权声明：本文内容由互联网用户贡献，该文观点仅代表作者本人。本站仅提供信息存储服务，不拥有所有权，不承担相关法律责任。 如发现本站有涉嫌抄袭侵权/违法违规的内容， 请发送邮件至 2386932994@qq.com 举报，一经查实将立刻删除。
上一篇： 猜年龄小游戏进阶之函数处理
下一篇： day006-python函数
推荐阅读
-
java中instanceof与Class的等价性代码示例
-
eclipse怎么创建servlet中class并配置servlet教程
-
Myeclipse怎么更改默认的class模板?
-
快速解决vue动态绑定多个class的官方实例语法无效的问题
-
通过Class类获取对象(实例讲解)
-
SpringBoot启动报错Failed to determine a suitable driver class
-
java中Class.forName方法的作用详解
-
bootstrap单选框样式（js修改class属性）
-
java abstract class interface之间的区别介绍
-
Python中Class类用法实例分析
发表评论