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@ 2015-10-16T11:27:09Z

<?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', 'int');

    echo 'Hello';
}

myargs('hello', 4);

Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 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: Fatal error: Uncaught InvalidArgumentException: Expected argument 2 to be of type int, received integer in /in/m4bee:20 Stack trace: #0 /in/m4bee(27): strict('string', 'int') #1 /in/m4bee(32): myargs('hello', 4) #2 {main} thrown in /in/m4bee on line 20
Process exited with code 255.
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28: Fatal error: Uncaught exception 'InvalidArgumentException' with message 'Expected argument 2 to be of type int, received integer' in /in/m4bee:20 Stack trace: #0 /in/m4bee(27): strict('string', 'int') #1 /in/m4bee(32): myargs('hello', 4) #2 {main} thrown in /in/m4bee on line 20
Process exited with code 255.

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