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');
?>