Online PHP editor | output for oEYJC

@ 2014-04-08T13:27:43Z

<?php

define('TYPEHINT_PCRE', '/^Argument (\d)+ passed to (?:(\w+)::)?(\w+)\(\) must be an instance of (\w+), (\w+) given/');

class Typehint
{

    private static $Typehints = array(
        'boolean'   => 'is_bool',
        'int'       => 'is_int',
        'integer'   => 'is_int',
        'float'     => 'is_float',
        'string'    => 'is_string',
        'resrouce'  => 'is_resource'
    );

    private function __Constrct() {}

    public static function initializeHandler()
    {

        set_error_handler('Typehint::handleTypehint', E_ALL);

        return TRUE;
    }

    private static function getTypehintedArgument($ThBackTrace, $ThFunction, $ThArgIndex, &$ThArgValue)
    {

        foreach ($ThBackTrace as $ThTrace)
        {

            // Match the function; Note we could do more defensive error checking.
            if (isset($ThTrace['function']) && $ThTrace['function'] == $ThFunction)
            {

                $ThArgValue = $ThTrace['args'][$ThArgIndex - 1];

                return TRUE;
            }
        }

        return FALSE;
    }

    public static function handleTypehint($ErrLevel, $ErrMessage, $ErrFile, $ErrLine)
    {

        if ($ErrLevel == E_RECOVERABLE_ERROR)
        {

            if (preg_match(TYPEHINT_PCRE, $ErrMessage, $ErrMatches))
            {

                list($ErrMatch, $ThArgIndex, $ThClass, $ThFunction, $ThHint, $ThType) = $ErrMatches;

                if (isset(self::$Typehints[$ThHint]))
                {

                    $ThBacktrace = debug_backtrace();
                    $ThArgValue  = NULL;

                    if (self::getTypehintedArgument($ThBacktrace, $ThFunction, $ThArgIndex, $ThArgValue))
                    {

                        if (call_user_func(self::$Typehints[$ThHint], $ThArgValue))
                        {

                            return TRUE;
                        }
                    }
                }
            }
        }

        throw new ErrorException($ErrMessage, 0, $ErrLevel, $ErrFile, $ErrLine);
    }
}

Typehint::initializeHandler();


function test(int $number) {
    echo $number;
}

test(5);
test("5");

Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: 55
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28: 5 Fatal error: Uncaught exception 'ErrorException' with message 'Argument 1 passed to test() must be an instance of int, string given, called in /in/oEYJC on line 88 and defined' in /in/oEYJC:83 Stack trace: #0 /in/oEYJC(83): Typehint::handleTypehint(4096, 'Argument 1 pass...', '/in/oEYJC', 83, Array) #1 /in/oEYJC(88): test('5') #2 {main} thrown in /in/oEYJC on line 83
Process exited with code 255.
Output for 5.2.2 - 5.2.17: 5 Fatal error: Uncaught exception 'ErrorException' with message 'Argument 1 passed to test() must be an instance of int, string given, called in /in/oEYJC on line 88 and defined' in /in/oEYJC:83 Stack trace: #0 /in/oEYJC(83): Typehint::handleTypehint('5') #1 /in/oEYJC(88): test() #2 {main} thrown in /in/oEYJC on line 83
Process exited with code 255.
Output for 5.2.0 - 5.2.1: Catchable fatal error: Argument 1 passed to test() must be an instance of int, integer given, called in /in/oEYJC on line 87 and defined in /in/oEYJC on line 83
Process exited with code 255.
Output for 5.1.0 - 5.1.6: Fatal error: Argument 1 passed to test() must be an object of class int, called in /in/oEYJC on line 87 and defined in /in/oEYJC on line 83
Process exited with code 255.
Output for 5.0.0 - 5.0.5: Warning: set_error_handler() expects the argument (Typehint::handleTypehint) to be a valid callback in /in/oEYJC on line 22 Fatal error: Argument 1 must be an object of class int in /in/oEYJC on line 83
Process exited with code 255.
Output for 4.4.2 - 4.4.9: Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/oEYJC on line 8
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1: Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/oEYJC on line 8
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/oEYJC on line 8
Process exited with code 255.

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