3v4l.org

run code in 300+ PHP versions simultaneously
<?php $_POST['foo'] = ''; $_POST['bar'] = ''; $_POST['baz'] = ''; // fields $fields = [['Label_Field' => 'foo']]; // just labels $labels = array_column($fields, 'Label_Field'); // filter $_POST by keys which are in $labels $data = array_filter($_POST, fn($k) => in_array($k, $labels), ARRAY_FILTER_USE_KEY); print_r($data);
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Array ( [foo] => )
Output for 7.3.0 - 7.3.33
Parse error: syntax error, unexpected '=>' (T_DOUBLE_ARROW), expecting ')' in /in/vna02 on line 14
Process exited with code 255.

preferences:
128.2 ms | 401 KiB | 150 Q