3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<? php $input = array( array( 'tag_name' => 'google' ), array( 'tag_name' => 'technology' ) ); echo implode(', ', array_column($input, 'tag_name')); ?>
based on Ish2r
Output for 5.4.0 - 5.4.32
<? php $input = array( array( 'tag_name' => 'google' ), array( 'tag_name' => 'technology' ) ); echo implode(', ', array_column($input, 'tag_name')); ?>