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php操作mysql的类

程序员文章站 2023-12-22 22:35:58
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[PHP]代码

  1. class mysql {
  2. private $db_host; //数据库主机
  3. private $db_user; //数据库用户名
  4. private $db_pwd; //数据库用户名密码
  5. private $db_database; //数据库名
  6. private $conn; //数据库连接标识;
  7. private $result; //执行query命令的结果资源标识
  8. private $sql; //sql执行语句
  9. private $row; //返回的条目数
  10. private $coding; //数据库编码,GBK,UTF8,gb2312
  11. private $bulletin = true; //是否开启错误记录
  12. private $show_error = false; //测试阶段,显示所有错误,具有安全隐患,默认关闭
  13. private $is_error = false; //发现错误是否立即终止,默认true,建议不启用,因为当有问题时用户什么也看不到是很苦恼的
  14. /*构造函数*/
  15. public function __construct($db_host, $db_user, $db_pwd, $db_database, $conn, $coding) {
  16. $this->db_host = $db_host;
  17. $this->db_user = $db_user;
  18. $this->db_pwd = $db_pwd;
  19. $this->db_database = $db_database;
  20. $this->conn = $conn;
  21. $this->coding = $coding;
  22. $this->connect();
  23. }
  24. /*数据库连接*/
  25. public function connect() {
  26. if ($this->conn == "pconn") {
  27. //永久链接
  28. $this->conn = mysql_pconnect($this->db_host, $this->db_user, $this->db_pwd);
  29. } else {
  30. //即使链接
  31. $this->conn = mysql_connect($this->db_host, $this->db_user, $this->db_pwd);
  32. }
  33. if (!mysql_select_db($this->db_database, $this->conn)) {
  34. if ($this->show_error) {
  35. $this->show_error("数据库不可用:", $this->db_database);
  36. }
  37. }
  38. mysql_query("SET NAMES $this->coding");
  39. }
  40. /*数据库执行语句,可执行查询添加修改删除等任何sql语句*/
  41. public function query($sql) {
  42. if ($sql == "") {
  43. $this->show_error("SQL语句错误:", "SQL查询语句为空");
  44. }
  45. $this->sql = $sql;
  46. $result = mysql_query($this->sql, $this->conn);
  47. if (!$result) {
  48. //调试中使用,sql语句出错时会自动打印出来
  49. if ($this->show_error) {
  50. $this->show_error("错误SQL语句:", $this->sql);
  51. }
  52. } else {
  53. $this->result = $result;
  54. }
  55. return $this->result;
  56. }
  57. /*创建添加新的数据库*/
  58. public function create_database($database_name) {
  59. $database = $database_name;
  60. $sqlDatabase = 'create database ' . $database;
  61. $this->query($sqlDatabase);
  62. }
  63. /*查询服务器所有数据库*/
  64. //将系统数据库与用户数据库分开,更直观的显示?
  65. public function show_databases() {
  66. $this->query("show databases");
  67. echo "现有数据库:" . $amount = $this->db_num_rows($rs);
  68. echo "
    ";
  69. $i = 1;
  70. while ($row = $this->fetch_array($rs)) {
  71. echo "$i $row[Database]";
  72. echo "
    ";
  73. $i++;
  74. }
  75. }
  76. //以数组形式返回主机中所有数据库名
  77. public function databases() {
  78. $rsPtr = mysql_list_dbs($this->conn);
  79. $i = 0;
  80. $cnt = mysql_num_rows($rsPtr);
  81. while ($i $rs[] = mysql_db_name($rsPtr, $i);
  82. $i++;
  83. }
  84. return $rs;
  85. }
  86. /*查询数据库下所有的表*/
  87. public function show_tables($database_name) {
  88. $this->query("show tables");
  89. echo "现有数据库:" . $amount = $this->db_num_rows($rs);
  90. echo "
    ";
  91. $i = 1;
  92. while ($row = $this->fetch_array($rs)) {
  93. $columnName = "Tables_in_" . $database_name;
  94. echo "$i $row[$columnName]";
  95. echo "
    ";
  96. $i++;
  97. }
  98. }
  99. /*
  100. mysql_fetch_row() array $row[0],$row[1],$row[2]
  101. mysql_fetch_array() array $row[0] 或 $row[id]
  102. mysql_fetch_assoc() array 用$row->content 字段大小写敏感
  103. mysql_fetch_object() object 用$row[id],$row[content] 字段大小写敏感
  104. */
  105. /*取得结果数据*/
  106. public function mysql_result_li() {
  107. return mysql_result($str);
  108. }
  109. /*取得记录集,获取数组-索引和关联,使用$row['content'] */
  110. public function fetch_array($resultt="") {
  111. if($resultt""){
  112. return mysql_fetch_array($resultt);
  113. }else{
  114. return mysql_fetch_array($this->result);
  115. }
  116. }
  117. //获取关联数组,使用$row['字段名']
  118. public function fetch_assoc() {
  119. return mysql_fetch_assoc($this->result);
  120. }
  121. //获取数字索引数组,使用$row[0],$row[1],$row[2]
  122. public function fetch_row() {
  123. return mysql_fetch_row($this->result);
  124. }
  125. //获取对象数组,使用$row->content
  126. public function fetch_Object() {
  127. return mysql_fetch_object($this->result);
  128. }
  129. //简化查询select
  130. public function findall($table) {
  131. $this->query("SELECT * FROM $table");
  132. }
  133. //简化查询select
  134. public function select($table, $columnName = "*", $condition = '', $debug = '') {
  135. $condition = $condition ? ' Where ' . $condition : NULL;
  136. if ($debug) {
  137. echo "SELECT $columnName FROM $table $condition";
  138. } else {
  139. $this->query("SELECT $columnName FROM $table $condition");
  140. }
  141. }
  142. //简化删除del
  143. public function delete($table, $condition, $url = '') {
  144. if ($this->query("DELETE FROM $table WHERE $condition")) {
  145. if (!empty ($url))
  146. $this->Get_admin_msg($url, '删除成功!');
  147. }
  148. }
  149. //简化插入insert
  150. public function insert($table, $columnName, $value, $url = '') {
  151. if ($this->query("INSERT INTO $table ($columnName) VALUES ($value)")) {
  152. if (!empty ($url))
  153. $this->Get_admin_msg($url, '添加成功!');
  154. }
  155. }
  156. //简化修改update
  157. public function update($table, $mod_content, $condition, $url = '') {
  158. //echo "UPDATE $table SET $mod_content WHERE $condition"; exit();
  159. if ($this->query("UPDATE $table SET $mod_content WHERE $condition")) {
  160. if (!empty ($url))
  161. $this->Get_admin_msg($url);
  162. }
  163. }
  164. /*取得上一步 INSERT 操作产生的 ID*/
  165. public function insert_id() {
  166. return mysql_insert_id();
  167. }
  168. //指向确定的一条数据记录
  169. public function db_data_seek($id) {
  170. if ($id > 0) {
  171. $id = $id -1;
  172. }
  173. if (!@ mysql_data_seek($this->result, $id)) {
  174. $this->show_error("SQL语句有误:", "指定的数据为空");
  175. }
  176. return $this->result;
  177. }
  178. // 根据select查询结果计算结果集条数
  179. public function db_num_rows() {
  180. if ($this->result == null) {
  181. if ($this->show_error) {
  182. $this->show_error("SQL语句错误", "暂时为空,没有任何内容!");
  183. }
  184. } else {
  185. return mysql_num_rows($this->result);
  186. }
  187. }
  188. // 根据insert,update,delete执行结果取得影响行数
  189. public function db_affected_rows() {
  190. return mysql_affected_rows();
  191. }
  192. //输出显示sql语句
  193. public function show_error($message = "", $sql = "") {
  194. if (!$sql) {
  195. echo "" . $message . "";
  196. echo "
    ";
  197. } else {
  198. echo "
    ";
  199. echo "错误信息提示:
    ";
  200. echo "
    ";
  201. echo "
    ";
  202. echo "错误号:12142";
  203. echo "

";
  • echo "错误原因:" . mysql_error() . "

    ";
  • echo "
    ";
  • echo "" . $message . "";
  • echo "
  • ";
  • echo "
    " . $sql . "
    ";
  • $ip = $this->getip();
  • if ($this->bulletin) {
  • $time = date("Y-m-d H:i:s");
  • $message = $message . "\r\n$this->sql" . "\r\n客户IP:$ip" . "\r\n时间 :$time" . "\r\n\r\n";
  • $server_date = date("Y-m-d");
  • $filename = $server_date . ".txt";
  • $file_path = "error/" . $filename;
  • $error_content = $message;
  • //$error_content="错误的数据库,不可以链接";
  • $file = "error"; //设置文件保存目录
  • //建立文件夹
  • if (!file_exists($file)) {
  • if (!mkdir($file, 0777)) {
  • //默认的 mode 是 0777,意味着最大可能的访问权
  • die("upload files directory does not exist and creation failed");
  • }
  • }
  • //建立txt日期文件
  • if (!file_exists($file_path)) {
  • //echo "建立日期文件";
  • fopen($file_path, "w+");
  • //首先要确定文件存在并且可写
  • if (is_writable($file_path)) {
  • //使用添加模式打开$filename,文件指针将会在文件的开头
  • if (!$handle = fopen($file_path, 'a')) {
  • echo "不能打开文件 $filename";
  • exit;
  • }
  • //将$somecontent写入到我们打开的文件中。
  • if (!fwrite($handle, $error_content)) {
  • echo "不能写入到文件 $filename";
  • exit;
  • }
  • //echo "文件 $filename 写入成功";
  • echo "——错误记录被保存!";
  • //关闭文件
  • fclose($handle);
  • } else {
  • echo "文件 $filename 不可写";
  • }
  • } else {
  • //首先要确定文件存在并且可写
  • if (is_writable($file_path)) {
  • //使用添加模式打开$filename,文件指针将会在文件的开头
  • if (!$handle = fopen($file_path, 'a')) {
  • echo "不能打开文件 $filename";
  • exit;
  • }
  • //将$somecontent写入到我们打开的文件中。
  • if (!fwrite($handle, $error_content)) {
  • echo "不能写入到文件 $filename";
  • exit;
  • }
  • //echo "文件 $filename 写入成功";
  • echo "——错误记录被保存!";
  • //关闭文件
  • fclose($handle);
  • } else {
  • echo "文件 $filename 不可写";
  • }
  • }
  • }
  • echo "
    ";
  • if ($this->is_error) {
  • exit;
  • }
  • }
  • echo "
  • ";
  • echo "
  • ";
  • echo "
    ";
  • }
  • //释放结果集
  • public function free() {
  • @ mysql_free_result($this->result);
  • }
  • //数据库选择
  • public function select_db($db_database) {
  • return mysql_select_db($db_database);
  • }
  • //查询字段数量
  • public function num_fields($table_name) {
  • //return mysql_num_fields($this->result);
  • $this->query("select * from $table_name");
  • echo "
    ";
  • echo "字段数:" . $total = mysql_num_fields($this->result);
  • echo "
    ";
  • for ($i = 0; $i print_r(mysql_fetch_field($this->result, $i));
  • }
  • echo "";
  • echo "
    ";
  • }
  • //取得 MySQL 服务器信息
  • public function mysql_server($num = '') {
  • switch ($num) {
  • case 1 :
  • return mysql_get_server_info(); //MySQL 服务器信息
  • break;
  • case 2 :
  • return mysql_get_host_info(); //取得 MySQL 主机信息
  • break;
  • case 3 :
  • return mysql_get_client_info(); //取得 MySQL 客户端信息
  • break;
  • case 4 :
  • return mysql_get_proto_info(); //取得 MySQL 协议信息
  • break;
  • default :
  • return mysql_get_client_info(); //默认取得mysql版本信息
  • }
  • }
  • //析构函数,自动关闭数据库,垃圾回收机制
  • public function __destruct() {
  • if (!empty ($this->result)) {
  • $this->free();
  • }
  • mysql_close($this->conn);
  • } //function __destruct();
  • /*获得客户端真实的IP地址*/
  • function getip() {
  • if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown")) {
  • $ip = getenv("HTTP_CLIENT_IP");
  • } else
  • if (getenv("HTTP_X_FORWARDED_FOR") &&strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown")) {
  • $ip = getenv("HTTP_X_FORWARDED_FOR");
  • } else
  • if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown")) {
  • $ip = getenv("REMOTE_ADDR");
  • } else
  • if (isset ($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] &&strcasecmp($_SERVER['REMOTE_ADDR'], "unknown")) {
  • $ip = $_SERVER['REMOTE_ADDR'];
  • } else {
  • $ip = "unknown";
  • }
  • return ($ip);
  • }
  • function inject_check($sql_str) { //防止注入
  • $check =eregi('select|insert|update|delete|\'|\/\*|\*|\.\.\/|\.\/|union|into|load_file|outfile',$sql_str);
  • if ($check) {
  • echo "输入非法注入内容!";
  • exit ();
  • } else {
  • return $sql_str;
  • }
  • }
  • function checkurl() { //检查来路
  • if (preg_replace("/https?:\/\/([^\:\/]+).*/i", "\\1", $_SERVER['HTTP_REFERER']) !== preg_replace("/([^\:]+).*/", "\\1", $_SERVER['HTTP_HOST'])) {
  • header("Location: http://www.dareng.com");
  • exit();
  • }
  • }
  • }
  • ?>
  • 复制代码
    php, mysql
    相关标签: php操作mysql的类

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