Create .ZIP archive in PHP

ZIPMaker.php

<?php
/**
 * @Author  Shaharia Azam
 * @Author URL  http://www.shahariaazam.com
 *
 * @Description this function will make a .zip folder by adding multiple files.
 * @link    http://php.net/manual/en/book.zip.php
 *
 * @param array $SourceFiles
 * @param string $ZipDestination
 * @param bool $overwrite
 *
 * @return bool
 */
/* creates a compressed zip file */
function ZipMaker($SourceFiles = array(),$ZipDestination = '',$overwrite = false) {
    //Overwrite the existing ZIP if it's exist already
    if(file_exists($ZipDestination) && !$overwrite) { return false; }
    $valid_files = array();
    if(is_array($SourceFiles)) {
        foreach($SourceFiles as $file) {
            //Whether the file is exists or not
            if(file_exists($file)) {
                $valid_files[] = $file;
            }
        }
    }
    //Perform action on valid files
    if(count($valid_files)) {
        //create the archive
        $zip = new ZipArchive();
        if($zip->open($ZipDestination,$overwrite ? ZIPARCHIVE::OVERWRITE : ZIPARCHIVE::CREATE) !== true) {
            return false;
        }
        //add the files
        foreach($valid_files as $file) {
            $zip->addFile($file,$file);
        }
        $zip->close();

        //double check that Zip created and exists at last
        return file_exists($ZipDestination);
    }
    else
    {
        return false;
    }
}
$AddToZip = array(
    'forZip1.txt',
    'forZip2.txt'
);

/**
 * Now perform execution
 */
$result = ZipMaker($AddToZip,'newZip.zip');
var_dump($result);