php导出.sql文件,mysql数据库备份程序

时间：2015-01-23 来源：西部数据作者：西部数据

<?php

$database='';//数据库名

$options=array(

    'hostname' => '',//ip地址

    'charset' => 'utf8',//编码

    'filename' => $database.'.sql',//文件名

    'username' => '',

    'password' => ''

);

mysql_connect($options['hostname'],$options['username'],$options['password'])or die("不能连接数据库!");

mysql_select_db($database) or die("数据库名称错误!");

mysql_query("SET NAMES '{$options['charset']}'");

$tables = list_tables($database);

$filename = sprintf($options['filename'],$database);

$fp = fopen($filename, 'w');

foreach ($tables as $table) {

    dump_table($table, $fp);

}

fclose($fp);

//下载sql文件

$file_name=$options['filename'];

Header("Content-type:application/octet-stream");

Header("Content-Disposition:attachment;filename=".$file_name);

readfile($file_name);

//删除服务器上的sql文件

unlink($file_name);

exit;

//获取表的名称

function list_tables($database)

{

    $rs = mysql_list_tables($database);

    $tables = array();

    while ($row = mysql_fetch_row($rs)) {

        $tables[] = $row[0];

    }

    mysql_free_result($rs);

    return $tables;

}

//导出数据库

function dump_table($table, $fp = null)

{

    $need_close = false;

    if (is_null($fp)) {

        $fp = fopen($table . '.sql', 'w');

        $need_close = true;

    }

$a=mysql_query("show create table `{$table}`");

$row=mysql_fetch_assoc($a);fwrite($fp,$row['Create Table'].';');//导出表结构

    $rs = mysql_query("SELECT * FROM `{$table}`");

    while ($row = mysql_fetch_row($rs)) {

        fwrite($fp, get_insert_sql($table, $row));

    }

    mysql_free_result($rs);

    if ($need_close) {

        fclose($fp);

    }

}

//导出表数据

function get_insert_sql($table, $row)

{

    $sql = "INSERT INTO `{$table}` VALUES (";

    $values = array();

    foreach ($row as $value) {

        $values[] = "'" . mysql_real_escape_string($value) . "'";

    }//开源代码phpfensi.com

    $sql .= implode(', ', $values) . ");";

    return $sql;

}?>