کد:
<?php
    function backup_db($host, $user, $pass, $name, $tables = '*') {
        date_default_timezone_set('Asia/Tehran');
   
        $return = '';
   
        mysql_connect($host,$user,$pass) or die('Connection error');
        mysql_select_db($name) or die('Database error');
        mysql_query('SET NAMES \'utf8\'');
        mysql_set_charset('utf8');
   
        if($tables == '*') {
            $tables = array();
            $result = mysql_query('SHOW TABLES');
            while($row = mysql_fetch_row($result)) {
                $tables[] = $row[0];
            }
            mysql_free_result($result);
        }
        else {
            $tables = is_array($tables) ? $tables : explode(',', $tables);
        }
   
        foreach($tables as $table) {
            $result = mysql_query('SELECT * FROM `'.$table.'`');
            $num_fields = mysql_num_fields($result);
            $return .= 'DROP TABLE IF EXISTS `'.$table.'`;'.PHP_EOL.PHP_EOL;
            $row = mysql_fetch_row(mysql_query('SHOW CREATE TABLE `'.$table.'`'));
            $return .= $row[1].';'.PHP_EOL.PHP_EOL;
   
            for ($i = 0; $i < $num_fields; $i++) {
                while($row = mysql_fetch_row($result)) {
                    $return.= 'INSERT INTO `'.$table.'` VALUES(';
                    for($j = 0; $j < $num_fields; $j++) {
                        $row[$j] = addslashes($row[$j]);
                        $row[$j] = str_replace('\n', '\\n', $row[$j]);
                        if (isset($row[$j])) {
                            $return .= '\''.$row[$j].'\'';
                        }
                        else {
                            $return .= '\'\'';
                        }
                        if ($j < ($num_fields - 1)) {
                            $return .= ',';
                        }
                    }
                    $return .= ');'.PHP_EOL;
                }
            }
            $return .= PHP_EOL.PHP_EOL.PHP_EOL;
        }
    file_put_contents('db_backup.sql',$return);
    }
 
backup_db('localhost', '*****', '*******', '******'); 
function mail_attachment($filename, $path, $mailto, $from_mail, $from_name,  $subject, $message) {
    $file = $path.$filename;
    $file_size = filesize($file);
    $handle = fopen($file, "r");
    $content = fread($handle, $file_size);
    fclose($handle);
    $content = chunk_split(base64_encode($content));
    $uid = md5(uniqid(time()));
    $name = basename($file);
    $header = "From: ".$from_name." <".$from_mail.">\r\n";
    $header .= "Reply-To: ".$from_mail."\r\n";
    $header .= "MIME-Version: 1.0\r\n";
    $header .= "Content-Type: multipart/mixed; boundary=\"".$uid."\"\r\n\r\n";
    $header .= "This is a multi-part message in MIME format.\r\n";
    $header .= "--".$uid."\r\n";
    $header .= "Content-type:text/plain; charset=iso-8859-1\r\n";
    $header .= "Content-Transfer-Encoding: 7bit\r\n\r\n";
    $header .= $message."\r\n\r\n";
    $header .= "--".$uid."\r\n";
    $header .= "Content-Type: application/octet-stream; name=\"".$filename."\"\r\n"; // use different content types here
    $header .= "Content-Transfer-Encoding: base64\r\n";
    $header .= "Content-Disposition: attachment; filename=\"".$filename."\"\r\n\r\n";
    $header .= $content."\r\n\r\n";
    $header .= "--".$uid."--";
    if (mail($mailto, $subject, "", $header)) {
        echo "mail send ... OK"; // or use booleans here
    } else {
        echo "mail send ... ERROR!";
    }
}
$my_file = "db_backup.sql";
$my_path = $_SERVER['DOCUMENT_ROOT']."/";
$my_name = "raj";
$my_mail = "info@domain.com";
$my_subject = "Email Subject ";
$my_message = "Refer the attached file.";
$to_email="civilparto@yahoo.com";
  
mail_attachment($my_file, $my_path, $to_email, $my_mail, $my_name, $my_subject, $my_message);
unlink('db_backup.sql');
?>
دوستان وقتی فایل مربوطه رو اجرا میکنیم فایل بک اپ دیتابیس به راحتی ایمیل میشه و به صورت صحیح
اما وقتی تو کرون جاب اجراش میکنیم فایل رو خالی میفرسته .
اگر دوستان میتونن کمک کنن ممنون میشم