一款实例mysql php连接类_PHP教程

一款实例mysql php连接类 下面这款mysql数据库连接文章，是我从一个cms搞下来的，很完整的。直接调用就OK了。

一款实例mysql教程 php教程连接类
下面这款mysql数据库教程连接文章，是我从一个cms搞下来的，很完整的。直接调用就ok了。
*/

class dbmysq {

var $querynum = 0;
var $link;
var $histories;
var $time;
var $tablepre;

function connect($dbhost, $dbuser, $dbpw, $dbname = '', $dbcharset, $pconnect = 0, $tablepre='', $time = 0) {
$this->time = $time;
$this->tablepre = $tablepre;
if ($pconnect) {
if (!$this->link = mysql_pconnect($dbhost, $dbuser, $dbpw)) {
$this->halt('can not connect to mysql server');
}
} else {
if (!$this->link = mysql_connect($dbhost, $dbuser, $dbpw, 1)) {
$this->halt('can not connect to mysql server');
}
}

if ($this->version() > '4.1') {
if ($dbcharset) {
mysql_query("set character_set_connection=" . $dbcharset . ", character_set_results=" . $dbcharset . ", character_set_client=binary", $this->link);
}

if ($this->version() > '5.0.1') {
mysql_query("set sql_mode=''", $this->link);
}
}

if ($dbname) {
mysql_select_db($dbname, $this->link);
}
}

function fetch_array($query, $result_type = mysql_assoc) {
return mysql_fetch_array($query, $result_type);
}

function result_first($sql, &$data) {
$query = $this->query($sql);
$data = $this->result($query, 0);
}

function fetch_first($sql, &$arr) {
$query = $this->query($sql);
$arr = $this->fetch_array($query);
}

function fetch_all($sql, &$arr) {
$query = $this->query($sql);
while ($data = $this->fetch_array($query)) {
$arr[] = $data;
}
}

function cache_gc() {
$this->query("delete from {$this->tablepre}sqlcaches where expirytime");
}

function query($sql, $type = '', $cachetime = false) {
$func = $type == 'unbuffered' && @function_exists('mysql_unbuffered_query') ? 'mysql_unbuffered_query' : 'mysql_query';
if (!($query = $func($sql, $this->link)) && $type != 'silent') {
$this->halt('mysql query error', $sql);
}
$this->querynum++;
$this->histories[] = $sql;
return $query;
}

function affected_rows() {
return mysql_affected_rows($this->link);
}

function error() {
return (($this->link) ? mysql_error($this->link) : mysql_error());
}

function errno() {
return intval(($this->link) ? mysql_errno($this->link) : mysql_errno());
}

function result($query, $row) {
$query = @mysql_result($query, $row);
return $query;
}

function num_rows($query) {
$query = mysql_num_rows($query);
return $query;
}

function num_fields($query) {
return mysql_num_fields($query);
}

function free_result($query) {
return mysql_free_result($query);
}

function insert_id() {
return ($id = mysql_insert_id($this->link)) >= 0 ? $id : $this->result($this->query("select last_insert_id()"), 0);
}

function fetch_row($query) {
$query = mysql_fetch_row($query);
return $query;
}

function fetch_fields($query) {
return mysql_fetch_field($query);
}

function version() {
return mysql_get_server_info($this->link);
}

function close() {
return mysql_close($this->link);
}

function halt($message='', $sql='') {
exit('
提示：数据库错误
sql语句：' . $sql . '
错误关键字：' . mysql_error());
}

}

?>

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