3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = <<<POST wow, that film was #hilarious I #love turtles #YouTube has funny videos that I #love <3 POST; preg_match_all('/#(\w+)\b/', $string, $matches); var_dump(array_count_values($matches[0]));
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
array(3) { ["#hilarious"]=> int(1) ["#love"]=> int(2) ["#YouTube"]=> int(1) }

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228.97 ms | 403 KiB | 287 Q