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@ 2015-10-16T11:28:02Z

<?php

function strict()
{
    $backtrace = debug_backtrace(0, 2);

    if (false === $backtrace || count($backtrace) !== 2) {
        throw new \RuntimeException('strict() must be called from within a function');
    }

    $expectedTypes = func_get_args();
    $receivedTypes = array_map('gettype', $backtrace[1]['args']);

    if (count($expectedTypes) !== count($receivedTypes)) {
        throw new \InvalidArgumentException('Got ' . count($receivedTypes) . ' arguments, expected ' . count($expectedTypes));
    }

    for ($i = 0; $i < count($expectedTypes); $i++) {
        if ($expectedTypes[$i] !== $receivedTypes[$i]) {
            throw new \InvalidArgumentException('Expected argument ' . ($i + 1) . ' to be of type ' . $expectedTypes[$i] . ', received ' . $receivedTypes[$i]);
        }
    }
}

function myargs($a, $b)
{
    strict('string', 'integer');

    echo 'Hello'.PHP_EOL;
}

myargs('hello', 4);
myargs(4, 'oof');

Output for git.master, git.master_jit, rfc.property-hooks: Hello Fatal error: Uncaught InvalidArgumentException: Expected argument 1 to be of type string, received integer in /in/GHGNf:20 Stack trace: #0 /in/GHGNf(27): strict('string', 'integer') #1 /in/GHGNf(33): myargs(4, 'oof') #2 {main} thrown in /in/GHGNf on line 20
Process exited with code 255.

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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