<?php
$classNames = array(
"Foo", // userland class
"StdClass", // class defined by php-src, but still not considered as internal
"ReflectionClass", // internal class
"ArrayObject", // internal class implementing Serializable
);
foreach($classNames as $className) {
print_r("-----------$className-----------");
var_dump(instanitateWithoutConstructorThroughUnserialize($className));
if (version_compare(PHP_VERSION, '5.4.0') >= 0) {
var_dump(instanitateWithoutConstructorThroughReflection($className));
}
print_r("----------------------");
}
function instanitateWithoutConstructorThroughUnserialize($className) {
return unserialize(sprintf('O:%d:"%s":0:{}', strlen($className), $className));
}
function instanitateWithoutConstructorThroughReflection($className) {
try {
$ref = new ReflectionClass($className);
return $ref->newInstanceWithoutConstructor();
} catch (ReflectionException $e) {
return $e;
}
}
class Foo {}
-----------Foo-----------object(Foo)#1 (0) {
}
object(Foo)#2 (0) {
}
---------------------------------StdClass-----------object(stdClass)#2 (0) {
}
object(stdClass)#1 (0) {
}
---------------------------------ReflectionClass-----------
Fatal error: Uncaught Exception: Unserialization of 'ReflectionClass' is not allowed in /in/4ZKKW:20
Stack trace:
#0 /in/4ZKKW(20): unserialize('O:15:"Reflectio...')
#1 /in/4ZKKW(12): instanitateWithoutConstructorThroughUnserialize('ReflectionClass')
#2 {main}
thrown in /in/4ZKKW on line 20
Process exited with code 255.
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
-----------Foo-----------object(Foo)#1 (0) {
}
object(Foo)#2 (0) {
}
---------------------------------StdClass-----------object(stdClass)#2 (0) {
}
object(stdClass)#1 (0) {
}
---------------------------------ReflectionClass-----------
Warning: Erroneous data format for unserializing 'ReflectionClass' in /in/4ZKKW on line 20
Notice: unserialize(): Error at offset 26 of 27 bytes in /in/4ZKKW on line 20
bool(false)
object(ReflectionClass)#2 (1) {
["name"]=>
string(0) ""
}
---------------------------------ArrayObject-----------
Fatal error: Uncaught UnexpectedValueException: Incomplete or ill-typed serialization data in /in/4ZKKW:20
Stack trace:
#0 [internal function]: ArrayObject->__unserialize(Array)
#1 /in/4ZKKW(20): unserialize('O:11:"ArrayObje...')
#2 /in/4ZKKW(12): instanitateWithoutConstructorThroughUnserialize('ArrayObject')
#3 {main}
thrown in /in/4ZKKW on line 20
Process exited with code 255.
Output for 7.3.32 - 7.3.33
-----------Foo-----------object(Foo)#1 (0) {
}
object(Foo)#2 (0) {
}
---------------------------------StdClass-----------object(stdClass)#2 (0) {
}
object(stdClass)#1 (0) {
}
---------------------------------ReflectionClass-----------object(ReflectionClass)#1 (1) {
["name"]=>
string(0) ""
}
object(ReflectionClass)#2 (1) {
["name"]=>
string(0) ""
}
---------------------------------ArrayObject-----------
Warning: Erroneous data format for unserializing 'ArrayObject' in /in/4ZKKW on line 20
bool(false)
object(ArrayObject)#1 (1) {
["storage":"ArrayObject":private]=>
array(0) {
}
}
----------------------