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<?php $pattern = '[a-z\d+#.-]+'; // Borrowed from @Hamza. $tags =<<<TAGS gggd hfhfghg;hfhdfh fgjfgjgf;hfhdfh;hfhdfh fgjgfj;hfhdfh;hfhdfh;hfhdfh hfhdfh;hfhdfh;hfhdfh;hfhdfh;hfhdfh hfhdfh;hfhdfh;hfhdfh;hfhdfh;hfhdfh;hfhdfh hfhdfh;hfhdfh;hfhdfh;hfhdfh;hfhdfh;hfhdfh;hfhdfh hfhdfh;hfhdfh;hfhdfh;hfhdfh;hfhdfh;hfhdfh;hfhdfh;hfhdfh TAGS; $prevChar = ';'; $count = 0; $len = strlen($tags); $allowedChars = ';abcdefghijklmnopqrstuvwxyz0123456789#.-'; for ($i = 0; $i < $len; $i++) { $current = $tags[$i]; if ($current === ';') { $count++; continue; } if ($current === $prevChar) { $count = 0; break; } if (strpos($allowedChars, $current) === false) { $count = 0; break; } $prevChar = $current; } var_dump($count); if (preg_match('/'.$pattern.'/', $tags)) { var_dump(substr_count($tags, ';')); }
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
int(0) int(28)