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1 <?php
2 /**
3 * base include file for SimpleTest
4 * @package SimpleTest
5 * @version $Id: compatibility.php,v 1.11 2006/11/08 16:15:06 lastcraft Exp $
6 */
8 /**
9 * Static methods for compatibility between different
10 * PHP versions.
11 * @package SimpleTest
13 class SimpleTestCompatibility {
15 /**
16 * Creates a copy whether in PHP5 or PHP4.
17 * @param object $object Thing to copy.
18 * @return object A copy.
19 * @access public
20 * @static
22 function copy($object) {
23 if (version_compare(phpversion(), '5') >= 0) {
24 eval('$copy = clone $object;');
25 return $copy;
27 return $object;
30 /**
31 * Identity test. Drops back to equality + types for PHP5
32 * objects as the === operator counts as the
33 * stronger reference constraint.
34 * @param mixed $first Test subject.
35 * @param mixed $second Comparison object.
36 * @return boolean True if identical.
37 * @access public
38 * @static
40 function isIdentical($first, $second) {
41 if ($first != $second) {
42 return false;
44 if (version_compare(phpversion(), '5') >= 0) {
45 return SimpleTestCompatibility::_isIdenticalType($first, $second);
47 return ($first === $second);
50 /**
51 * Recursive type test.
52 * @param mixed $first Test subject.
53 * @param mixed $second Comparison object.
54 * @return boolean True if same type.
55 * @access private
56 * @static
58 function _isIdenticalType($first, $second) {
59 if (gettype($first) != gettype($second)) {
60 return false;
62 if (is_object($first) && is_object($second)) {
63 if (get_class($first) != get_class($second)) {
64 return false;
66 return SimpleTestCompatibility::_isArrayOfIdenticalTypes(
67 get_object_vars($first),
68 get_object_vars($second));
70 if (is_array($first) && is_array($second)) {
71 return SimpleTestCompatibility::_isArrayOfIdenticalTypes($first, $second);
73 if ($first !== $second) {
74 return false;
76 return true;
79 /**
80 * Recursive type test for each element of an array.
81 * @param mixed $first Test subject.
82 * @param mixed $second Comparison object.
83 * @return boolean True if identical.
84 * @access private
85 * @static
87 function _isArrayOfIdenticalTypes($first, $second) {
88 if (array_keys($first) != array_keys($second)) {
89 return false;
91 foreach (array_keys($first) as $key) {
92 $is_identical = SimpleTestCompatibility::_isIdenticalType(
93 $first[$key],
94 $second[$key]);
95 if (! $is_identical) {
96 return false;
99 return true;
103 * Test for two variables being aliases.
104 * @param mixed $first Test subject.
105 * @param mixed $second Comparison object.
106 * @return boolean True if same.
107 * @access public
108 * @static
110 function isReference(&$first, &$second) {
111 if (version_compare(phpversion(), '5', '>=') && is_object($first)) {
112 return ($first === $second);
114 if (is_object($first) && is_object($second)) {
115 $id = uniqid("test");
116 $first->$id = true;
117 $is_ref = isset($second->$id);
118 unset($first->$id);
119 return $is_ref;
121 $temp = $first;
122 $first = uniqid("test");
123 $is_ref = ($first === $second);
124 $first = $temp;
125 return $is_ref;
129 * Test to see if an object is a member of a
130 * class hiearchy.
131 * @param object $object Object to test.
132 * @param string $class Root name of hiearchy.
133 * @return boolean True if class in hiearchy.
134 * @access public
135 * @static
137 function isA($object, $class) {
138 if (version_compare(phpversion(), '5') >= 0) {
139 if (! class_exists($class, false)) {
140 if (function_exists('interface_exists')) {
141 if (! interface_exists($class, false)) {
142 return false;
146 eval("\$is_a = \$object instanceof $class;");
147 return $is_a;
149 if (function_exists('is_a')) {
150 return is_a($object, $class);
152 return ((strtolower($class) == get_class($object))
153 or (is_subclass_of($object, $class)));
157 * Sets a socket timeout for each chunk.
158 * @param resource $handle Socket handle.
159 * @param integer $timeout Limit in seconds.
160 * @access public
161 * @static
163 function setTimeout($handle, $timeout) {
164 if (function_exists('stream_set_timeout')) {
165 stream_set_timeout($handle, $timeout, 0);
166 } elseif (function_exists('socket_set_timeout')) {
167 socket_set_timeout($handle, $timeout, 0);
168 } elseif (function_exists('set_socket_timeout')) {
169 set_socket_timeout($handle, $timeout, 0);