3v4l.org

run code in 300+ PHP versions simultaneously
<?php $search = preg_quote('test'); $pattern = '#([^ ]+ )?'.$search.'( [^ ]+)?#'; $res = preg_match_all($pattern,'write your test data here',$regs); var_dump($regs); $res = preg_match_all($pattern,'test data here',$regs); var_dump($regs); $res = preg_match_all($pattern,'write your test',$regs); var_dump($regs); $res = preg_match_all($pattern,'not found at all',$regs); var_dump($regs); $res = preg_match_all($pattern,'write your test data found more than once test here ',$regs); var_dump($regs);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(3) { [0]=> array(1) { [0]=> string(14) "your test data" } [1]=> array(1) { [0]=> string(5) "your " } [2]=> array(1) { [0]=> string(5) " data" } } array(3) { [0]=> array(1) { [0]=> string(9) "test data" } [1]=> array(1) { [0]=> string(0) "" } [2]=> array(1) { [0]=> string(5) " data" } } array(3) { [0]=> array(1) { [0]=> string(9) "your test" } [1]=> array(1) { [0]=> string(5) "your " } [2]=> array(1) { [0]=> string(0) "" } } array(3) { [0]=> array(0) { } [1]=> array(0) { } [2]=> array(0) { } } array(3) { [0]=> array(2) { [0]=> string(14) "your test data" [1]=> string(14) "once test here" } [1]=> array(2) { [0]=> string(5) "your " [1]=> string(5) "once " } [2]=> array(2) { [0]=> string(5) " data" [1]=> string(5) " here" } }

preferences:
254.82 ms | 408 KiB | 355 Q