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run code in 300+ PHP versions simultaneously

@ 2015-10-20T10:59:27Z

<?php
/**
 * A polyfill library with PHP 7's improved way of doing integer division
 *
 * @author Michael Cullum <m@michaelcullum.com>
 * @license http://www.opensource.org/licenses/mit-license.html MIT License
 * @copyright 2015 Michael Cullum
 */
namespace {
    if (!function_exists('intdiv')) {
        function intdiv($dividend, $divisor)
        {
            $dividend = (int) $dividend;
            $divisor = (int) $divisor;
            if ($divisor === 0) {
                throw new DivisionByZeroError('Division by zero');
            }
            if ($divisor === -1 && $dividend == ~PHP_INT_MAX) {
                throw new ArithmeticError('Division of PHP_INT_MIN by -1 is not an integer');
            }
            $dividend = ($dividend - $dividend % $divisor);
            return ((int) ($dividend / $divisor));
        }
    }
    if (!class_exists('ArithmeticError') || !class_exists('DivisionByZeroError')) {
        if (!class_exists('Throwable')) {
            class Throwable extends \Exception
            {
                public function __toString()
                {
                    return $this->getMessage();
                }
            }
        }
        if (!class_exists('Error')) {
            class Error extends Throwable
            {
                public function __toString()
                {
                    return $this->getMessage();
                }
            }
        }
        if (!class_exists('ArithmeticError')) {
            class ArithmeticError extends Error
            {
                public function __toString()
                {
                    return $this->getMessage();
                }
            }
        }
        if (!class_exists('DivisionByZeroError')) {
            class DivisionByZeroError extends Error
            {
                public function __toString()
                {
                    return $this->getMessage();
                }
            }
        }
    }
    foreach (array('Error', 'ArithmeticError', 'DivisionByZeroError') as $class) {
        print_r(class_implements($class));
        if (!count(array_intersect(array('Exception', 'Throwable'), class_implements($class)))) {
            throw new \RuntimeException('A class named \''.$class.'\' is already defined that cannot be thrown.');
        }
    }
}

Output for 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: Array ( [Stringable] => Stringable [Throwable] => Throwable ) Array ( [Throwable] => Throwable [Stringable] => Stringable ) Array ( [Stringable] => Stringable [Throwable] => Throwable )
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Array ( [Stringable] => Stringable [Throwable] => Throwable ) Array ( [Throwable] => Throwable [Stringable] => Stringable ) Array ( [Stringable] => Stringable [Throwable] => Throwable )
Output for 8.0.0 - 8.0.13: Array ( [Throwable] => Throwable [Stringable] => Stringable ) Array ( [Stringable] => Stringable [Throwable] => Throwable ) Array ( [Throwable] => Throwable [Stringable] => Stringable )
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33: Array ( [Throwable] => Throwable ) Array ( [Throwable] => Throwable ) Array ( [Throwable] => Throwable )
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28: Array ( ) Fatal error: Uncaught exception 'RuntimeException' with message 'A class named 'Error' is already defined that cannot be thrown.' in /in/rZLLA:66 Stack trace: #0 {main} thrown in /in/rZLLA on line 66
Process exited with code 255.

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