3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $input = array( array( '1' => '2', '2' => '3' ), array( '1' => '3', '2' => '2' ) ); echo implode(', ', array_map(function ($entry) { return $entry['tag_name']; }, $input));
based on ltBZ0
Output for 5.3.0 - 7.2.0
Notice: Undefined index: tag_name in /in/2kX32 on line 15 Notice: Undefined index: tag_name in /in/2kX32 on line 15 ,
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION, expecting ')' in /in/2kX32 on line 14
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION, expecting ')' in /in/2kX32 on line 14
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/2kX32 on line 14
Process exited with code 255.