vendor/sebastian/environment/src/Runtime.php

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<?php
/*
 * This file is part of the Environment package.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace SebastianBergmann\Environment;

/**
 * Utility class for HHVM/PHP environment handling.
 */
class Runtime
{
    /**
     * @var string
     */
    private static $binary;

    /**
     * Returns true when Xdebug is supported or
     * the runtime used is PHPDBG (PHP >= 7.0).
     *
     * @return bool
     */
    public function canCollectCodeCoverage()
    {
        return $this->hasXdebug() || $this->hasPHPDBGCodeCoverage();
    }

    /**
     * Returns the path to the binary of the current runtime.
     * Appends ' --php' to the path when the runtime is HHVM.
     *
     * @return string
     */
    public function getBinary()
    {
        // HHVM
        if (self::$binary === null && $this->isHHVM()) {
            if ((self::$binary = getenv('PHP_BINARY')) === false) {
                self::$binary = PHP_BINARY;
            }

            self::$binary = escapeshellarg(self::$binary) . ' --php';
        }

        // PHP >= 5.4.0
        if (self::$binary === null && defined('PHP_BINARY')) {
            if (PHP_BINARY !== '') {
                self::$binary = escapeshellarg(PHP_BINARY);
            }
        }

        // PHP < 5.4.0
        if (self::$binary === null) {
            if (PHP_SAPI == 'cli' && isset($_SERVER['_'])) {