run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump(json_encode("{a: 1.3320000}"));

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

Output for Array change keys
string(16) ""{a: 1.3320000}""
Output for Lexical anon
string(16) ""{a: 1.3320000}""
Output for Typed properties
string(16) ""{a: 1.3320000}""

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