3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $post_data = array('hoge' => 'hoge', 'piyo' => 'piyo'); echo "{$post_data['hoge']}_{$post_data['fuga']}_{$post_data['piyo']}";
Output for 5.3.0 - 7.1.0
Notice: Undefined index: fuga in /in/t6ShM on line 5 hoge__piyo
Output for 4.3.0 - 5.2.17
Notice: Undefined index: fuga in /in/t6ShM on line 5 hoge__piyo