3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $input = array( array( 'tag_name' => 'google' ), array( 'tag_name' => 'technology' ) ); $letters = array(); foreach ($input as $value['tag_name']) { $letters = array_merge($letters, $value); } echo implode(', ', $letters);
based on AXZK6
Output for 4.3.0 - 7.2.0
Notice: Array to string conversion in /in/DOVSq on line 16 Array