3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $input = array( array( 'tag_name' => 'google' ), array( 'tag_name' => 'technology' ) ); $flat = call_user_func_array('array_merge', $input); echo implode(',', $flat);
based on pcfuf
Output for 4.3.0 - 7.2.0
technology