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--TEST-- Bug #66121 - UTF-8 lookbehinds match bytes instead of characters --FILE-- <?php // Sinhala characters var_dump(preg_replace('/(?<!ක)/u', '*', 'ක')); var_dump(preg_replace('/(?<!ක)/u', '*', 'ම')); // English characters var_dump(preg_replace('/(?<!k)/u', '*', 'k')); var_dump(preg_replace('/(?<!k)/u', '*', 'm')); // Sinhala characters preg_match_all('/(?<!ක)/u', 'ම', $matches, PREG_OFFSET_CAPTURE); var_dump($matches); // invalid UTF-8 var_dump(preg_replace('/(?<!ක)/u', '*', "\xFCක")); var_dump(preg_replace('/(?<!ක)/u', '*', "ක\xFC")); var_dump(preg_match_all('/(?<!ක)/u', "\xFCම", $matches, PREG_OFFSET_CAPTURE)); var_dump(preg_match_all('/(?<!ක)/u', "\xFCම", $matches, PREG_OFFSET_CAPTURE)); ?> --EXPECT-- string(4) "*ක" string(5) "*ම*" string(2) "*k" string(3) "*m*" array(1) { [0]=> array(2) { [0]=> array(2) { [0]=> string(0) "" [1]=> int(0) } [1]=> array(2) { [0]=> string(0) "" [1]=> int(3) } } } NULL NULL bool(false) bool(false)