3v4l.org

run code in 500+ PHP versions simultaneously
<?php $str = 'I1:1;I2:2;I8:2;NA1:5;IA1:[1,2,3,4,5];S1:asadada;SA1:[1,2,3,4,5];SA1:[1,2,3,4,5];'; preg_match_all('/;(.+?)\:/',$str,$matches); print_r($matches[1]);
Output for 7.1.25 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.32, 8.3.0 - 8.3.33, 8.4.1 - 8.4.24, 8.5.0 - 8.5.9
Array ( [0] => I2 [1] => I8 [2] => NA1 [3] => IA1 [4] => S1 [5] => SA1 [6] => SA1 )
preferences:
114.36 ms | 1555 KiB | 4 Q