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run code in 200+ php & hhvm versions
Bugs & Features
<?php $array = []; $array["a"] =& $array["b"]; $array["b"] = 1; var_dump($array);

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

Output for Arrow functions
array(2) { ["b"]=> &int(1) ["a"]=> &int(1) }
Output for Object typehint
array(2) { ["b"]=> &int(1) ["a"]=> &int(1) }
Output for Array change keys
array(2) { ["a"]=> &int(1) ["b"]=> &int(1) }
Output for Lexical anon
array(2) { ["a"]=> &int(1) ["b"]=> &int(1) }
Output for Typed properties
array(2) { ["a"]=> &int(1) ["b"]=> &int(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