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<?php
/**
* base include file for SimpleTest
* @package SimpleTest
* @version $Id: compatibility.php 1532 2006-12-01 12:28:55Z xue $
*/
/**
* Static methods for compatibility between different
* PHP versions.
* @package SimpleTest
*/
class SimpleTestCompatibility {
/**
* Creates a copy whether in PHP5 or PHP4.
* @param object $object Thing to copy.
* @return object A copy.
* @access public
* @static
*/
static function copy($object) {
if (version_compare(phpversion(), '5') >= 0) {
eval('$copy = clone $object;');
return $copy;
}
return $object;
}
/**
* Identity test. Drops back to equality + types for PHP5
* objects as the === operator counts as the
* stronger reference constraint.
* @param mixed $first Test subject.
* @param mixed $second Comparison object.
* @return boolean True if identical.
* @access public
* @static
*/
static function isIdentical($first, $second) {
if ($first != $second) {
return false;
}
if (version_compare(phpversion(), '5') >= 0) {
return SimpleTestCompatibility::_isIdenticalType($first, $second);
}
return ($first === $second);
}
/**
* Recursive type test.
* @param mixed $first Test subject.
* @param mixed $second Comparison object.
* @return boolean True if same type.
* @access private
* @static
*/
static function _isIdenticalType($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);
}
return true;
}
/**
* Recursive type test for each element of an array.
* @param mixed $first Test subject.
* @param mixed $second Comparison object.
* @return boolean True if identical.
* @access private
* @static
*/
static function _isArrayOfIdenticalTypes($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;
}
/**
* Test for two variables being aliases.
* @param mixed $first Test subject.
* @param mixed $second Comparison object.
* @return boolean True if same.
* @access public
* @static
*/
static function isReference($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;
}
/**
* Test to see if an object is a member of a
* class hiearchy.
* @param object $object Object to test.
* @param string $class Root name of hiearchy.
* @return boolean True if class in hiearchy.
* @access public
* @static
*/
static function isA($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)));
}
/**
* Sets a socket timeout for each chunk.
* @param resource $handle Socket handle.
* @param integer $timeout Limit in seconds.
* @access public
* @static
*/
static function setTimeout($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);
}
}
/**
* Gets the current stack trace topmost first.
* @return array List of stack frames.
* @access public
* @static
*/
static function getStackTrace() {
if (function_exists('debug_backtrace')) {
return array_reverse(debug_backtrace());
}
return array();
}
}
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