3v4l.org

run code in 500+ PHP versions simultaneously
<?php $tests = [ 'Blah blah blah. THIS SENTENCE SHOULD BE SELECTED [bbcode] text', 'THIS SENTENCE SHOULD BE SELECTED [bbcode] text', 'A trick sentence. And another. THIS SENTENCE SHOULD BE SELECTED [bbcode]] text' ]; foreach ($tests as $test) { var_export(preg_match('/ *\K[^.]+?(?=\s+\[bbcode])/i', $test, $m) ? $m[0] : 'no match'); echo "\n---\n"; }
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
'THIS SENTENCE SHOULD BE SELECTED' --- 'THIS SENTENCE SHOULD BE SELECTED' --- 'THIS SENTENCE SHOULD BE SELECTED' ---
preferences:
97.44 ms | 1285 KiB | 4 Q