pharext\Cli\Args::parse PHP Метод

    public function parse($argc, array $argv)
    {
        for ($f = false, $p = 0, $i = 0; $i < $argc; ++$i) {
            $o = $argv[$i];
            if ($o[0] === "-" && strlen($o) > 2 && $o[1] !== "-") {
                // multiple short opts, e.g. -vps
                $argc += strlen($o) - 2;
                array_splice($argv, $i, 1, array_map(function ($s) {
                    return "-{$s}";
                }, str_split(substr($o, 1))));
                $o = $argv[$i];
            } elseif ($o[0] === "-" && strlen($o) > 2 && $o[1] === "-" && 0 < ($eq = strpos($o, "="))) {
                // long opt with argument, e.g. --foo=bar
                $argc++;
                array_splice($argv, $i, 1, [substr($o, 0, $eq++), substr($o, $eq)]);
                $o = $argv[$i];
            } elseif ($o === "--") {
                // only positional args following
                $f = true;
                continue;
            }
            if ($f || !isset($this->spec[$o])) {
                if ($o[0] !== "-" && isset($this->spec["--{$p}"])) {
                    $this[$p] = $o;
                    if (!$this->optIsMulti($p)) {
                        ++$p;
                    }
                } else {
                    (yield sprintf("Unknown option %s", $o));
                }
            } elseif (!$this->optAcceptsArg($o)) {
                $this[$o] = true;
            } elseif ($i + 1 < $argc && !isset($this->spec[$argv[$i + 1]])) {
                $this[$o] = $argv[++$i];
            } elseif ($this->optRequiresArg($o)) {
                (yield sprintf("Option --%s requires an argument", $this->optLongName($o)));
            } else {
                // OPTARG
                $this[$o] = $this->optDefaultArg($o);
            }
            if ($this->optHalts($o)) {
                return;
            }
        }
    }

 public function testValidate()
 {
     $this->args->compile([["r", "required-option", "This option is required", CliArgs::REQUIRED | CliArgs::NOARG]]);
     foreach ($this->args->parse(0, []) as $error) {
         throw new \Exception("Unexpected parse error: {$error}");
     }
     foreach ($this->args->validate() as $error) {
         $this->assertStringMatchesFormat("%srequired-option%srequired", $error);
     }
     $this->assertTrue(isset($error));
 }