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<?php $search = 'a\' UNION (SELECT 1, fname, username, password FROM users);--'; $keywords = ["SELECT", "FROM", "WHERE", "LIKE", "AND", "OR", "ON","UNION", "JOIN"]; //sprintf requires textual percent signs to be escaped as %% $query = 'SELECT * FROM shopping WHERE title LIKE \'%%%s%%\''; foreach ($keywords as $w) { if (false !== stripos($search, $w)) { //found a keyword build the replacement capture groups. $patterns = '/\b(' . implode('|', $keywords) . ')\b/i'; $query = preg_replace($patterns, '$1JERRY', $query); break; } } printf($query, $search);
Output for git.master, git.master_jit, rfc.property-hooks
SELECTJERRY * FROMJERRY shopping WHEREJERRY title LIKEJERRY '%a' UNION (SELECT 1, fname, username, password FROM users);--%'

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