3v4l.org

run code in 300+ PHP versions simultaneously
<?php $records = array( array( 'id' => 2135, 'first_name' => 'John', 'last_name' => 'Doe' ), array( 'id' => -1, 'first_name' => 'Sally', 'last_name' => 'Smith' ), array( 'id' => -2, 'first_name' => 'Jane', 'last_name' => 'Jones' ), ); $firstNames = array_column($records, null, 'id'); print_r($firstNames);

preferences:
52.22 ms | 402 KiB | 5 Q