builder.php

<?php
/**
 * Created by PhpStorm.
 * User: Andrew
 * Date: 2014.01.25.
 * Time: 8:56
 */

class BuildPhar
{
    private $_sourceDirectory = null;
    private $_stubFile        = null;
    private $_outputDirectory = null;
    private $_pharFileName    = null;

    /**
     * @param $_sourceDirectory       // This is the directory where your project is stored.
     * @param $stubFile               // Name the entry point for your phar file. This file have to be within the source
     *                                   directory.
     * @param null $_outputDirectory  // Directory where the phar file will be placed.
     * @param string $pharFileName    // Name of your final *.phar file.
     */
    public function __construct($_sourceDirectory, $stubFile, $_outputDirectory = null, $pharFileName = 'myPhar.phar') {

        if ((file_exists($_sourceDirectory) === false) || (is_dir($_sourceDirectory) === false)) {
            throw new Exception('No valid source directory given.');
        }
        $this->_sourceDirectory = $_sourceDirectory;

        if (file_exists($this->_sourceDirectory.'/'.$stubFile) === false) {
            throw new Exception('Your given stub file doesn\'t exists.');
        }

        $this->_stubFile = $stubFile;

        if(empty($pharFileName) === true) {
            throw new Exception('Your given output name for your phar-file is empty.');
        }
        $this->_pharFileName = $pharFileName;

        if ((empty($_outputDirectory) === true) || (file_exists($_outputDirectory) === false) || (is_dir($_outputDirectory) === false)) {

            if ($_outputDirectory !== null) {
                trigger_error ( 'Your output directory is invalid. We set the fallback to: "'.dirname(__FILE__).'".', E_USER_WARNING);
            }

            $this->_outputDirectory = dirname(__FILE__);
        } else {
            $this->_outputDirectory = $_outputDirectory;
        }

        $this->prepareBuildDirectory();
        $this->buildPhar();
    }

    private function prepareBuildDirectory() {
        if (preg_match('/.phar$/', $this->_pharFileName) == FALSE) {
            $this->_pharFileName .= '.phar';
        }

        if (file_exists($this->_pharFileName) === true) {
            unlink($this->_pharFileName);
        }
    }

    private function buildPhar() {
        $phar = new Phar($this->_outputDirectory.'/'.$this->_pharFileName);
        $phar->buildFromDirectory($this->_sourceDirectory);
        $phar->setDefaultStub($this->_stubFile);
    }
}

$builder = new BuildPhar(
    dirname(__FILE__).'/src',
    'Modulizer.php',
    dirname(__FILE__).'/build',
    'Modulizer.phar'
);