PhpCsFixer\Linter\ProcessLinter::__construct PHP Method

    public function __construct($executable = null)
    {
        if (null === $executable) {
            $executableFinder = new PhpExecutableFinder();
            $executable = $executableFinder->find(false);
            if (false === $executable) {
                throw new UnavailableLinterException('Cannot find PHP executable.');
            }
            if ('phpdbg' === PHP_SAPI) {
                if (false === strpos($executable, 'phpdbg')) {
                    throw new UnavailableLinterException('Automatically found PHP executable is non-standard phpdbg. Could not find proper PHP executable.');
                }
                // automatically found executable is `phpdbg`, let us try to fallback to regular `php`
                $executable = str_replace('phpdbg', 'php', $executable);
                if (!is_executable($executable)) {
                    throw new UnavailableLinterException('Automatically found PHP executable is phpdbg. Could not find proper PHP executable.');
                }
            }
        }
        $this->executable = $executable;
        $this->fileRemoval = new FileRemoval();
    }