C:/xampp/htdocs/moodle/lib/simpletestlib/compatibility.php

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<?php
class SimpleTestCompatibility {
    
    function copy($object) {
        if (version_compare(phpversion(), '5') >= 0) {
            eval('$copy = clone $object;');
            return $copy;
        }
        return $object;
    }
    
    function isIdentical($first, $second) {
        if (version_compare(phpversion(), '5') >= 0) {
            return SimpleTestCompatibility::_isIdenticalType($first, $second);
        }
        if ($first != $second) {
            return false;
        }
        return ($first === $second);
    }
    
    function _isIdenticalType($first, $second) {
        if (gettype($first) != gettype($second)) {
            return false;
        }
        if (is_object($first) && is_object($second)) {
            if (get_class($first) != get_class($second)) {
                return false;
            }
            return SimpleTestCompatibility::_isArrayOfIdenticalTypes(
                    get_object_vars($first),
                    get_object_vars($second));
        }
        if (is_array($first) && is_array($second)) {
            return SimpleTestCompatibility::_isArrayOfIdenticalTypes($first, $second);
        }
        if ($first !== $second) {
            return false;
        }
        return true;
    }
    
    function _isArrayOfIdenticalTypes($first, $second) {
        if (array_keys($first) != array_keys($second)) {
            return false;
        }
        foreach (array_keys($first) as $key) {
            $is_identical = SimpleTestCompatibility::_isIdenticalType(
                    $first[$key],
                    $second[$key]);
            if (! $is_identical) {
                return false;
            }
        }
        return true;
    }
    
    function isReference(&$first, &$second) {
        if (version_compare(phpversion(), '5', '>=') && is_object($first)) {
            return ($first === $second);
        }
        if (is_object($first) && is_object($second)) {
            $id = uniqid("test");
            $first->$id = true;
            $is_ref = isset($second->$id);
            unset($first->$id);
            return $is_ref;
        }
        $temp = $first;
        $first = uniqid("test");
        $is_ref = ($first === $second);
        $first = $temp;
        return $is_ref;
    }
    
    function isA($object, $class) {
        if (version_compare(phpversion(), '5') >= 0) {
            if (! class_exists($class, false)) {
                if (function_exists('interface_exists')) {
                    if (! interface_exists($class, false))  {
                        return false;
                    }
                }
            }
            eval("\$is_a = \$object instanceof $class;");
            return $is_a;
        }
        if (function_exists('is_a')) {
            return is_a($object, $class);
        }
        return ((strtolower($class) == get_class($object))
                or (is_subclass_of($object, $class)));
    }
    
    function setTimeout($handle, $timeout) {
        if (function_exists('stream_set_timeout')) {
            stream_set_timeout($handle, $timeout, 0);
        } elseif (function_exists('socket_set_timeout')) {
            socket_set_timeout($handle, $timeout, 0);
        } elseif (function_exists('set_socket_timeout')) {
            set_socket_timeout($handle, $timeout, 0);
        }
    }
}
?>