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<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Process;

use Symfony\Component\Process\Exception\RuntimeException;

/**
 * PhpProcess runs a PHP script in an independent process.
 *
 * $p = new PhpProcess('<?php echo "foo"; ?>');
 * $p->run();
 * print $p->getOutput()."\n";
 *
 * @author Fabien Potencier <fabien@symfony.com>
 *
 * @api
 */
class PhpProcess extends Process
{
    private $executableFinder;

    /**
     * Constructor.
     *
     * @param string  $script  The PHP script to run (as a string)
     * @param string  $cwd     The working directory
     * @param array   $env     The environment variables
     * @param integer $timeout The timeout in seconds
     * @param array   $options An array of options for proc_open
     *
     * @api
     */
    public function __construct($script, $cwd = null, array $env = array(), $timeout = 60, array $options = array())
    {
        parent::__construct(null, $cwd, $env, $script, $timeout, $options);

        $this->executableFinder = new PhpExecutableFinder();
    }

    /**
     * Sets the path to the PHP binary to use.
     *
     * @api
     */
    public function setPhpBinary($php)
    {
        $this->setCommandLine($php);
    }

    /**
     * {@inheritdoc}
     */
    public function start($callback = null)
    {
        if (null === $this->getCommandLine()) {
            if (false === $php = $this->executableFinder->find()) {
                throw new RuntimeException('Unable to find the PHP executable.');
            }
            $this->setCommandLine($php);
        }

        parent::start($callback);
    }
}