PHP - Datenbank exportieren

https://stackoverflow.com/questions/10020022/how-to-export-and-import-mysql-database-with-its-data-using-php-script?noredirect=1&lq=1

Ohne exec()

<?php
/*
##### EXAMPLE #####
   EXPORT_DATABASE("localhost","user","pass","db_name" );

##### Notes #####
     * (optional) 5th parameter: to backup specific tables only,like: array("mytable1","mytable2",...)
     * (optional) 6th parameter: backup filename (otherwise, it creates random name)
     * IMPORTANT NOTE ! Many people replaces strings in SQL file, which is not recommended. READ THIS:  http://itask.software/tools/wordpress-migrator
     * If you need, you can check "import.php" too
*/

// by https://github.com/tazotodua/useful-php-scripts //
function EXPORT_DATABASE($host,$user,$pass,$name,$tables=false, $backup_name=false)
{
	set_time_limit(3000);
	$mysqli = new mysqli($host,$user,$pass,$name);
	$mysqli->select_db($name); $mysqli->query("SET NAMES 'utf8'");
	$queryTables = $mysqli->query('SHOW TABLES'); while($row = $queryTables->fetch_row()) {
		$target_tables[] = $row[0];
	}
	if($tables !== false) {
		$target_tables = array_intersect( $target_tables, $tables);
	}
	$content = "SET SQL_MODE = \"NO_AUTO_VALUE_ON_ZERO\";\r\nSET time_zone = \"+00:00\";\r\n\r\n\r\n/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;\r\n/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;\r\n/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;\r\n/*!40101 SET NAMES utf8 */;\r\n--\r\n-- Database: `".$name."`\r\n--\r\n\r\n\r\n";
	foreach($target_tables as $table){
		if (empty($table)){
			continue;
		}
		$result	= $mysqli->query('SELECT * FROM `'.$table.'`');
		$fields_amount=$result->field_count;
		$rows_num=$mysqli->affected_rows;
		$res = $mysqli->query('SHOW CREATE TABLE '.$table);
		$TableMLine=$res->fetch_row();
		$content .= "\n\n".$TableMLine[1].";\n\n";
		$TableMLine[1]=str_ireplace('CREATE TABLE `','CREATE TABLE IF NOT EXISTS `',$TableMLine[1]);
		for ($i = 0, $st_counter = 0; $i < $fields_amount;   $i++, $st_counter=0) {
			while($row = $result->fetch_row())	{ //when started (and every after 100 command cycle):
				if ($st_counter%100 == 0 || $st_counter == 0 )	{
					$content .= "\nINSERT INTO ".$table." VALUES";
				}
				$content .= "\n(";    for($j=0; $j<$fields_amount; $j++){ $row[$j] = str_replace("\n","\\n", addslashes($row[$j]) );
					if (isset($row[$j])){
						$content .= '"'.$row[$j].'"' ;
					} else{
						$content .= '""';
					}
					if ($j<($fields_amount-1)){
						$content.= ',';
					}
				}
				$content .=")";
				//every after 100 command cycle [or at last line] ....p.s. but should be inserted 1 cycle eariler
				if ( (($st_counter+1)%100==0 && $st_counter!=0) || $st_counter+1==$rows_num) {$content .= ";";} else {$content .= ",";}	$st_counter=$st_counter+1;
			}
		} $content .="\n\n\n";
	}
	$content .= "\r\n\r\n/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;\r\n/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;\r\n/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;";
	$backup_name = $backup_name ? $backup_name : $name.'___('.date('H-i-s').'_'.date('d-m-Y').').sql';
	ob_get_clean(); header('Content-Type: application/octet-stream');  header("Content-Transfer-Encoding: Binary");  header('Content-Length: '. (function_exists('mb_strlen') ? mb_strlen($content, '8bit'): strlen($content)) );    header("Content-disposition: attachment; filename=\"".$backup_name."\"");
	echo $content; exit;
}
?>

Import:

<?php
// EXAMPLE:	IMPORT_TABLES("localhost","user","pass","db_name", "my_baseeee.sql"); //TABLES WILL BE OVERWRITTEN
// P.S. IMPORTANT NOTE for people who try to change/replace some strings  in SQL FILE before importing, MUST READ:  https://goo.gl/2fZDQL

// https://github.com/tazotodua/useful-php-scripts
function IMPORT_TABLES($host,$user,$pass,$dbname, $sql_file_OR_content){
	set_time_limit(3000);
	$SQL_CONTENT = (strlen($sql_file_OR_content) > 300 ?  $sql_file_OR_content : file_get_contents($sql_file_OR_content)  );
	$allLines = explode("\n",$SQL_CONTENT);
	$mysqli = new mysqli($host, $user, $pass, $dbname);
	if (mysqli_connect_errno()){
		echo "Failed to connect to MySQL: " . mysqli_connect_error();
	}
	$zzzzzz = $mysqli->query('SET foreign_key_checks = 0');
	preg_match_all("/\nCREATE TABLE(.*?)\`(.*?)\`/si", "\n". $SQL_CONTENT, $target_tables);
	foreach ($target_tables[2] as $table){
		$mysqli->query('DROP TABLE IF EXISTS '.$table);
	}
	$zzzzzz = $mysqli->query('SET foreign_key_checks = 1');
	$mysqli->query("SET NAMES 'utf8'");
	$templine = '';	// Temporary variable, used to store current query
	foreach ($allLines as $line)	{											// Loop through each line
		if (substr($line, 0, 2) != '--' && $line != '') {$templine .= $line; 	// (if it is not a comment..) Add this line to the current segment
			if (substr(trim($line), -1, 1) == ';') {		// If it has a semicolon at the end, it's the end of the query
				if(!$mysqli->query($templine)){
					print('Error performing query \'<strong>' . $templine . '\': ' . $mysqli->error . '<br /><br />');
				}
				$templine = ''; // set variable to empty, to start picking up the lines after ";"
			}
		}
	}	return 'Importing finished. Now, Delete the import file.';
}   //see also export.php
?>

Mit Exec

$tableName  = 'mypet';
$backupFile = 'backup/mypet.sql';
$query      = "SELECT * INTO OUTFILE '$backupFile' FROM $tableName";
$result = mysql_query($query);
//or

$backupFile = $dbname . date("Y-m-d-H-i-s") . '.gz';
$command = "mysqldump --opt -h $dbhost -u $dbuser -p $dbpass $dbname | gzip >     $backupFile";
system($command);