<?php

ini_set('display_errors', false);

error_reporting(-1);

set_error_handler(function($code, $string, $file, $line){
        throw new ErrorException($string, null, $code, $file, $line);
    });

register_shutdown_function(function(){
        $error = error_get_last();
        if(null !== $error)
        {
           // echo 'Failed to download';
	   echo "<script>alert('Failed to Download');</script>";
	   echo "<script>window.location.href='backup.php?ret=f';</script>";
       exit;
        }
    });

// Database configuration
$host = "localhost";
$username = "root";
$password = "";
$database_name = "thahaayaa";

// Get connection object and set the charset
$conn = mysqli_connect($host, $username, $password, $database_name);
$conn->set_charset("utf8");

// Get All Table Names From the Database
$tables = array();
$tables1 = array();
$sql = "SHOW TABLES";
$result = mysqli_query($conn, $sql);
$rows = mysqli_num_rows($result);
$t1=0;

while($row = mysqli_fetch_row($result)) {
	$tables[] = $row[0];
	/*if($t1<10){
		$tables[] = $row[0];
	}
	if($t1>9 && $t1<20){
		$tables1[] = $row[0];
	}*/
	$t1++;
}

$sqlScript = "";
foreach ($tables as $table) {

    // Prepare SQLscript for creating table structure
    $query = "SHOW CREATE TABLE $table";
    $result = mysqli_query($conn, $query);
    $row = mysqli_fetch_row($result);

    $sqlScript .= "\n\n" . $row[1] . ";\n\n";

    $query = "SELECT * FROM $table";
    $result = mysqli_query($conn, $query);

    $columnCount = mysqli_num_fields($result);

    // Prepare SQLscript for dumping data for each table
    for ($i = 0; $i < $columnCount; $i ++) {
        while ($row = mysqli_fetch_row($result)) {
            $sqlScript .= "INSERT INTO $table VALUES(";
            for ($j = 0; $j < $columnCount; $j ++) {
                $row[$j] = $row[$j];

                if (isset($row[$j])) {
                    $sqlScript .= '"' . $row[$j] . '"';
                } else {
                    $sqlScript .= '""';
                }
                if ($j < ($columnCount - 1)) {
                    $sqlScript .= ',';
                }
            }
            $sqlScript .= ");\n";
        }
    }

    $sqlScript .= "\n"; 
}

if(!empty($sqlScript))
{
    // Save the SQL script to a backup file
    $backup_file_name = $database_name . '_backup_' . time() . '.sql';
    $fileHandler = fopen($backup_file_name, 'w+');
    $number_of_lines = fwrite($fileHandler, $sqlScript);
    fclose($fileHandler);

    // Download the SQL backup file to the browser
    header('Content-Description: File Transfer');
    header('Content-Type: application/octet-stream');
    header('Content-Disposition: attachment; filename=' . basename($backup_file_name));
    header('Content-Transfer-Encoding: binary');
    header('Expires: 0');
    header('Cache-Control: must-revalidate');
    header('Pragma: public');
    header('Content-Length: ' . filesize($backup_file_name));
    ob_clean();
    flush();
    readfile($backup_file_name);
    exec('rm ' . $backup_file_name); 
}

?>