3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = "<!-- static comment--> <a href='/dir1/dir2/DYNAMIC'> STRING1 STRING2 </a>"; $pattern ="# comment-->\n\s*<a href...dir1.dir2..*?>\s*([\w]+)\s*([\w]+)#s"; preg_match($pattern, $string, $match); var_dump($match[1]);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: Undefined array key 1 in /in/I6cVN on line 10 NULL
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.5 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined offset: 1 in /in/I6cVN on line 10 NULL
Output for 7.3.32 - 7.3.33
NULL
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
Notice: Undefined offset: 1 in /in/I6cVN on line 10 NULL

preferences:
233.52 ms | 402 KiB | 310 Q