Online PHP editor | refs for ChVr3

<?php $input = array( array( 'tag_name' => 'google' ), array( 'tag_name' => 'technology' ) ); $letters = array(); foreach ($input as $value) { $letters = array_merge($letters, $value["tag_name"]); } echo implode(', ', $letters); //$ids = array_column($input, 'tag_name'); //$output = implode(',', $ids);