3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array( '1st' => 'a', '2nd' => 'b', '3rd' => 'b' ); foreach($array as &$value) { if($value === 'a') { $array['1st'] = '1'; $array['2nd'] = '2'; array_splice($array, 0, 0, array('x')); //array pointer 초기화 //array_splice($array, count($array), 0, array('y')); //array pointer 초기화 } var_dump($value); } unset($value);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
string(1) "1" string(1) "b"
Output for 5.6.0 - 5.6.28
string(1) "1" string(1) "2" string(1) "b"
Output for 5.5.0 - 5.5.35
string(1) "1" string(1) "x" string(1) "1" string(1) "2" string(1) "b"
preferences:
184.95 ms | 401 KiB | 214 Q