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[代码] php数据库备份脚本
<?php    
// 备份数据库   
$host = "localhost";  
$user = "root"; //数据库账号  
$password = ""; //数据库密码  
$dbname = "mysql"; //数据库名称  
// 这里的账号、密码、名称都是从页面传过来的  
if (!mysql_connect($host, $user, $password)) // 连接mysql数据库  
{  
    echo '数据库连接失败，请核对后再试';  
    exit;  
}   

if (!mysql_select_db($dbname)) // 是否存在该数据库  
{  
    echo '不存在数据库:' . $dbname . ',请核对后再试';  
    exit;  
}   
mysql_query("set names 'utf8'");  
$mysql = "set charset utf8;\\r\\n";  
$q1 = mysql_query("show tables");  
while ($t = mysql_fetch_array($q1))  
{  
    $table = $t[0];  
    $q2 = mysql_query("show create table `$table`");  
    $sql = mysql_fetch_array($q2);  
    $mysql .= $sql['Create Table'] . ";\\r\\n";  
    $q3 = mysql_query("select * from `$table`");  
    while ($data = mysql_fetch_assoc($q3))  
    {  
        $keys = array_keys($data);  
        $keys = array_map('addslashes', $keys);  
        $keys = join('`,`', $keys);  
        $keys = "`" . $keys . "`";  
        $vals = array_values($data);  
        $vals = array_map('addslashes', $vals);  
        $vals = join("','", $vals);  
        $vals = "'" . $vals . "'";  
        $mysql .= "insert into `$table`($keys) values($vals);\\r\\n";  
    }   
}   

$filename = $dbname . date('Ymjgi') . ".sql"; //存放路径，默认存放到项目最外层  
$fp = fopen($filename, 'w');  
fputs($fp, $mysql);  
fclose($fp);  
echo "数据备份成功";  　
?>
//该片段来自于http://outofmemory.cn