php备份数据库

<?php
    /**
    *    
    *    @name  php备份数据库 
    *    @param string   $DbHost       连接主机
    *    @param string   $DbUser       用户名
    *    @param string   $DbPwd        连接密码
    *    @param string   $DbName       要备份的数据库
    *    @param string   $saveFileName 要保存的文件名, 默认文件保存在当前文件夹中,以日期作区分
    *    @return Null
    *    @example backupMySqlData(‘localhost‘, ‘root‘, ‘123456‘, ‘YourDbName‘);
    *
    */
    function backupMySqlData($DbHost, $DbUser, $DbPwd, $DbName, $saveFileName = ‘‘)
    {
        header("Content-type:text/html;charset=utf-8");
        error_reporting(0);
        set_time_limit(0);

        echo ‘数据备份中，请稍候......<br />‘;

        $link = mysql_connect($DbHost, $DbUser, $DbPwd) or die(‘数据库连接失败: ‘ . mysql_error());
        mysql_select_db($DbName) or die(‘数据库连接失败: ‘ . mysql_error());
        mysql_query(‘set names utf8‘);
        
        // 声明变量
        $isDropInfo     = ‘‘;
        $insertSQL      = ‘‘;
        $row            = array();
        $tables         = array();
        $tableStructure = array();
        $fileName       = ($saveFileName ? $saveFileName : ‘MySQL_data_bakeup_‘) . date(‘YmdHis‘) . ‘.sql‘;

        // 枚举该数据库所有的表
        $res = mysql_query("SHOW TABLES FROM $DbName");
        while ($row = mysql_fetch_row($res)) {

            $tables[] = $row[0];

        }
        mysql_free_result($res);

        // 枚举所有表的创建语句
        foreach ($tables as $val) {

            $res = mysql_query("show create table $val", $link);
            $row = mysql_fetch_row($res);

            $isDropInfo     = "DROP TABLE IF EXISTS `" . $val . "`;\r\n";
            $tableStructure = $isDropInfo . $row[1] . ";\r\n";

            file_put_contents($fileName, $tableStructure, FILE_APPEND);
            mysql_free_result($res);
        }

        // 枚举所有表的INSERT语句
        foreach ($tables as $val) {

            $res = mysql_query("select * from $val");

            // 没有数据的表不执行insert
            while ($row = mysql_fetch_row($res)) {

                $sqlStr = "INSERT INTO `".$val."` VALUES (";

                foreach($row as $v){

                    $sqlStr .= "‘$v‘,";

                }
                //去掉最后一个逗号
                $sqlStr  = substr($sqlStr, 0, strlen($sqlStr) - 1);
                $sqlStr .= ");\r\n";

                file_put_contents($fileName, $sqlStr, FILE_APPEND);
            }
            mysql_free_result($res);
        }

        echo ‘数据备份成功！‘;
    }
　　 // 调用此方法 
    backupMySqlData(‘localhost‘, ‘root‘, ‘123456‘, ‘YouDbName‘);    
?>