3v4l.org

run code in 300+ PHP versions simultaneously
<?php $ary1 = array( array( 'sn' => '123', 'name' => 'whatever', ), array( 'sn' => '234', 'name' => 'whatever', ), ); $ary2 = array( array( 'sn' => '123', 'gender' => 'male', ), array( 'sn' => '234', 'gender' => 'female', ), ); $res = []; foreach (array_merge($ary1, $ary2) as $a) { $res[$a['sn']] = array_merge($res[$a['sn']], $a) ?? $a; } var_dump($res);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: Undefined array key 123 in /in/1SE0o on line 27 Fatal error: Uncaught TypeError: array_merge(): Argument #1 must be of type array, null given in /in/1SE0o:27 Stack trace: #0 /in/1SE0o(27): array_merge(NULL, Array) #1 {main} thrown in /in/1SE0o on line 27
Process exited with code 255.
Output for 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined offset: 123 in /in/1SE0o on line 27 Warning: array_merge(): Expected parameter 1 to be an array, null given in /in/1SE0o on line 27 Notice: Undefined offset: 234 in /in/1SE0o on line 27 Warning: array_merge(): Expected parameter 1 to be an array, null given in /in/1SE0o on line 27 array(2) { [123]=> array(3) { ["sn"]=> string(3) "123" ["name"]=> string(8) "whatever" ["gender"]=> string(4) "male" } [234]=> array(3) { ["sn"]=> string(3) "234" ["name"]=> string(8) "whatever" ["gender"]=> string(6) "female" } }
Output for 7.3.32 - 7.3.33
Warning: array_merge(): Expected parameter 1 to be an array, null given in /in/1SE0o on line 27 Warning: array_merge(): Expected parameter 1 to be an array, null given in /in/1SE0o on line 27 array(2) { [123]=> array(3) { ["sn"]=> string(3) "123" ["name"]=> string(8) "whatever" ["gender"]=> string(4) "male" } [234]=> array(3) { ["sn"]=> string(3) "234" ["name"]=> string(8) "whatever" ["gender"]=> string(6) "female" } }
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33
Notice: Undefined offset: 123 in /in/1SE0o on line 27 Warning: array_merge(): Argument #1 is not an array in /in/1SE0o on line 27 Notice: Undefined offset: 234 in /in/1SE0o on line 27 Warning: array_merge(): Argument #1 is not an array in /in/1SE0o on line 27 array(2) { [123]=> array(3) { ["sn"]=> string(3) "123" ["name"]=> string(8) "whatever" ["gender"]=> string(4) "male" } [234]=> array(3) { ["sn"]=> string(3) "234" ["name"]=> string(8) "whatever" ["gender"]=> string(6) "female" } }
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Parse error: syntax error, unexpected '?' in /in/1SE0o on line 27
Process exited with code 255.

preferences:
228.07 ms | 402 KiB | 327 Q