urlencode在preg_replace中

preg_replace_callback

$str = preg_replace_callback(
    \"\'\\(look: (.{1,80})\\)\'Ui\",
    create_function(
        \'$matches\',
        \'return \\\'(look: <a href=\"dict.php?process=word&q=\'.urlencode($matches[1]).\'\">\'.
          $matches[1].\'</a>)\\\';\'
    ),
    $str);

$str = preg_replace_callback(
    \"\'\\(look: (.{1,80})\\)\'Ui\",
    function($matches) {
        return \"(look: <a href=\\\"dict.php?process=word&q=\".urlencode($matches[1]).\"\\\">\".
               $matches[1].\"</a>)\";
    },
    $str);