3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [ ['user_id' => 82, 'ac_type' => 1], ['user_id' => 80, 'ac_type' => 5], ['user_id' => 76, 'ac_type' => 1], ['user_id' => 82, 'ac_type' => 2], ['user_id' => 80, 'ac_type' => 5] ]; foreach ($array as $a) { $result[$a['user_id']] ??= $a; // only store if first occurrence of user_id } var_export(array_values($result)); // re-index and print
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
array ( 0 => array ( 'user_id' => 82, 'ac_type' => 1, ), 1 => array ( 'user_id' => 80, 'ac_type' => 5, ), 2 => array ( 'user_id' => 76, 'ac_type' => 1, ), )
preferences:
75.74 ms | 407 KiB | 5 Q