3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ /** * This class is a hand written simplified version of PHP native `ArrayObject` * class, to show that it behaves differently than the PHP native implementation. */ class CustomArrayObject implements ArrayAccess, IteratorAggregate, Countable, Serializable { private $array; public function __construct(array $array = null) { $this->array = $array ?: array(); } public function offsetExists($offset) { return array_key_exists($offset, $this->array); } public function offsetGet($offset) { return $this->array[$offset]; } public function offsetSet($offset, $value) { if (null === $offset) { $this->array[] = $value; } else { $this->array[$offset] = $value; } } public function offsetUnset($offset) { unset($this->array[$offset]); } public function getIterator() { return new ArrayIterator($this->array); } public function count() { return count($this->array); } public function serialize() { return serialize($this->array); } public function unserialize($serialized) { $this->array = (array) unserialize((string) $serialized); } } $array = array('foo' => 'bar', 'nulled' => null); $native = new ArrayObject($array); $custom = new CustomArrayObject($array); foreach (array('array' => $array, 'native' => $native, 'custom' => $custom) as $type => $collection) { echo 'Using the ' . $type .' implementation'.PHP_EOL; var_dump(isset($collection['missing']) || array_key_exists('missing', $collection)); }
Output for 5.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Using the array implementation bool(false) Using the native implementation bool(false) Using the custom implementation bool(false)
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.1.0 - 5.2.17
Parse error: syntax error, unexpected ':' in /in/tHtsF on line 23
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/tHtsF on line 21
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/tHtsF on line 17
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting '{' in /in/tHtsF on line 17
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/tHtsF on line 17
Process exited with code 255.