preg_replace_callback 中 function($match) use ($ten), 里面的 use 是什么意义

$string = "Some numbers: one: 1; two: 2; three: 3 end";<br />$ten = 10;<br />$newstring = preg_replace_callback(<br />    '/(\\d+)/',<br />    function($match) use ($ten) { return (($match[0] + $ten)); },<br />    $string<br />    );<br />echo $newstring; 

$string = "Some numbers: one: 1; two: 2; three: 3 end";<br />$ten = 10;<br />$newstring = preg_replace_callback(<br />    '/(\\d+)/',<br />    create_function('$match', "return \$match[0] + $ten;"),<br />    $string<br />    );<br />echo $newstring;