PHP uses the mysqldump command to export the database_PHP tutorial

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// $dumpFileName目录要有可写权限

$DbHost = 'localhost';

　　$DbUser = 'root';

　　$DbPwd = '123456';

　　$DbName = 'a';

$fileName = $DbName . '_MySQL_data_backup_' . date('YmdHis) . '.sql';

　　$dumpFileName= "/var/$fileName";

　　header("Content-Disposition: attachment; filename=" . $fileName);

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

　　header("Pragma:no-cache");

　　header("Expires:0");

　　echo `mysqldump -h $DbHost -u$DbUser -p$DbPwd $DbName > $dumpFileName`;

　　$hd = fopen($dumpFileName, 'rb');

　　echo fread($hd, filesize($dumpFileName));

　　fclose($hd);

?>