3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php class foo { function __construct() { $this->a = "hello"; $this->b = "hi"; $this->val = "howdy"; $val = "a"; echo $this->{$val}; // outputs "hello" echo "\n"; $val = "b"; echo $this->{$val}; // outputs "hi" echo "\n"; echo $this->val; //outputs "howdy" echo "\n"; echo $this->{"val"}; } } $foo = new foo();

Shows result from various feature-branches currently under review from the php developers. Contact me to have additional branches featured.

Output for Arrow functions
hello hi howdy howdy
Output for Object typehint
hello hi howdy howdy
Output for Array change keys
hello hi howdy howdy
Output for Lexical anon
hello hi howdy howdy
Output for Typed properties
hello hi howdy howdy

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page