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<?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 git.master_jit, git.master, rfc.property-hooks
'THIS SENTENCE SHOULD BE SELECTED' --- 'THIS SENTENCE SHOULD BE SELECTED' --- 'THIS SENTENCE SHOULD BE SELECTED' ---

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