Back up MYSQL database in PHP.

back_up_db_mysql.php

<?php

/* Some times you may wonder how you can automatically back up your Mysql database.
This functions helps you create a back up file for your mysql databases

*/


define ('DATABASE_NAME','YOR DATABASE NAME');
define ('DATABASE_USER','DATABASE USERNAME');
define ('DATABASE_PASSWORD','DATABASE PASSWORD');
define ('DATABASE_HOST','DATABASE HOST');
/*call backUpDb() function and pass the above parameters appropriately.
To select all the tables on the database pass * for $tables parameter
*/
backUpDb(DATABASE_HOST,DATABASE_USER,DATABASE_PASSWORD,DATABASE_NAME);

function backUpDb($dbHost,$dbUsername,$dbPassword,$dbName,$tables = '*'){
    //connect & select the database
    $db = new mysqli($dbHost, $dbUsername, $dbPassword, $dbName); 
	$return ='';
    //get all of the tables
    if($tables == '*'){
        $tables = array();
        $result = $db->query("SHOW TABLES");
        while($row = $result->fetch_row()){
			echo 'getting all tables '.$row[0].'<br>';
            $tables[] = $row[0];
        }
    }else{
        $tables = is_array($tables)?$tables:explode(',',$tables);
    }
 echo'<br>-----------------------------------------------------------------------------------------------------<br>';
    //loop through the tables
    foreach($tables as $table){
        $result = $db->query("SELECT * FROM $table");
        $numColumns = $result->field_count;
		echo ' get table content '. $table.'<br>';
		$return .='';
        $result2 = $db->query("SHOW CREATE TABLE $table");
        $row2 = $result2->fetch_row();

        $return .= "\n\n".$row2[1].";\n\n";

        for($i = 0; $i < $numColumns; $i++){
            while($row = $result->fetch_row()){
                $return .= "INSERT INTO $table VALUES(";
                for($j=0; $j < $numColumns; $j++){
                    $row[$j] = addslashes($row[$j]);
                    $row[$j] = preg_replace("/\n/","\\n",$row[$j]);
                    if (isset($row[$j])) { $return .= '"'.$row[$j].'"' ; } else { $return .= '""'; }
                    if ($j < ($numColumns-1)) { $return.= ','; }
                }
                $return .= ");\n";
            }
        }

        $return .= "\n\n\n";
    }
 echo'<br>-----------------------------------------------------------------------------------------------------<br>';
    //save database file as a .sql file. This file is saved with a time stamp
    $handle = fopen('dbname'.time().'.sql','w+');
    fwrite($handle,$return);
    fclose($handle);
	echo 'Database backed up successfully.';
}

?>