3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = '["userdomain.ltd"], ["test.com"]'; var_export( array_column(json_decode("[$str]"), 0) );
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
array ( 0 => 'userdomain.ltd', 1 => 'test.com', )
preferences:
103.77 ms | 402 KiB | 123 Q