3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php // Source: https://bugs.php.net/bug.php?id=64417 trait aa { private $container = array(); public function offsetSet($offset, $value) { if (is_null($offset)) { $this->container[] = $value; } else { $this->container[$offset] = $value; } } public function offsetExists($offset) { return isset($this->container[$offset]); } public function offsetUnset($offset) { unset($this->container[$offset]); } public function &offsetGet($offset) { $result = null; if (isset($this->container[$offset])) { $result = &$this->container[$offset]; } return $result; } } class obj implements ArrayAccess { use aa; } $o = new obj; $o['x'] = 1; ++$o['x']; echo $o['x'], "\n";
Output for 5.4.0 - 5.4.10, 5.4.14 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
2
Output for 5.4.11 - 5.4.13
Fatal error: Declaration of & aa::offsetGet($offset) must be compatible with ArrayAccess::offsetGet($offset) in /in/rsXrR on line 30
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected T_STRING in /in/rsXrR on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_STRING in /in/rsXrR on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/rsXrR on line 4
Process exited with code 255.