3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $var1 = 'Hello World'; $var2 = ''; $var2 =& $var1; debug_zval_dump($var1);
based on e31sB

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

Output for Arrow functions
string(11) "Hello World" refcount(1)
Output for Object typehint
string(11) "Hello World" refcount(1)
Output for Array change keys
string(11) "Hello World" refcount(1)
Output for Lexical anon
string(11) "Hello World" refcount(1)
Output for Typed properties
string(11) "Hello World" refcount(1)

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