如何一键导出MySQL数据库

时间:2022-04-04 11:46:04

有时候,你的用户要求添加一个选项,导出整个数据库到一个SQL文件。虽然phpMyAdmin,以及Navicat有这个功能,但你的用户想要更简单点怎么办?

以下是如何一键导出MySQL数据库的php代码。

新建一个名为backup.php的文件,复制粘贴以下代码,然后编辑数据库连接设置和mysqldump的路径。有必要的话,你还可以添加一个backup.php超链接到你的程序里:

<A href="backup.php">导出整个数据库</A>


 

请注意,第一个php代码执行的时候,会导出zip压缩后的sql文件,所以此代码所在文件夹需要可写的权限。
如果你没有写的权限,请使用第二个php代码,缺点是导出的sql文件不会被zip压缩。

此代码需要可写权限:

<?php 
  
$username = "root";  
$password = "";  
$hostname = "localhost";  
$dbname   = "cars"; 
  
// if mysqldump is on the system path you do not need to specify the full path 
// simply use "mysqldump --add-drop-table ..." in this case 
$dumpfname = $dbname . "_" . date("Y-m-d_H-i-s").".sql"; 
$command = "C:\\xampp\\mysql\\bin\\mysqldump --add-drop-table --host=$hostname 
    --user=$username "; 
if ($password)  
        $command.= "--password=". $password ." ";  
$command.= $dbname; 
$command.= " > " . $dumpfname; 
system($command); 
  
// zip the dump file 
$zipfname = $dbname . "_" . date("Y-m-d_H-i-s").".zip"; 
$zip = new ZipArchive(); 
if($zip->open($zipfname,ZIPARCHIVE::CREATE))  
{ 
   $zip->addFile($dumpfname,$dumpfname); 
   $zip->close(); 
} 
  
// read zip file and send it to standard output 
if (file_exists($zipfname)) { 
    header('Content-Description: File Transfer'); 
    header('Content-Type: application/octet-stream'); 
    header('Content-Disposition: attachment; filename='.basename($zipfname)); 
    flush(); 
    readfile($zipfname); 
    exit; 
} 
?> 


此代码不需要可写权限:

<?php 
ob_start(); 
  
$username = "root";  
$password = "";  
$hostname = "localhost";  
$dbname   = "cars"; 
  
// if mysqldump is on the system path you do not need to specify the full path 
// simply use "mysqldump --add-drop-table ..." in this case 
$command = "C:\\xampp\\mysql\\bin\\mysqldump --add-drop-table --host=$hostname 
    --user=$username "; 
if ($password)  
        $command.= "--password=". $password ." ";  
$command.= $dbname; 
system($command); 
  
$dump = ob_get_contents();  
ob_end_clean(); 
  
// send dump file to the output 
header('Content-Description: File Transfer'); 
header('Content-Type: application/octet-stream'); 
header('Content-Disposition: attachment; filename='.basename($dbname . "_" .  
    date("Y-m-d_H-i-s").".sql")); 
flush(); 
echo $dump; 
exit();]]> 
?>