可否根据下面的两个数组来判断趋势

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Release： 2016-06-13 12:36:08

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能否根据下面的两个数组来判断趋势？

      <br />
               $old_rank = array(<br />
			"1"=>array('uid'=>132,'use_score'=>61570),<br />
			"2"=>array('uid'=>121,'use_score'=>50932),<br />
			"3"=>array('uid'=>145,'use_score'=>46789),<br />
			"4"=>array('uid'=>100,'use_score'=>39089),<br />
			"5"=>array('uid'=>167,'use_score'=>29089)<br />
		);<br />
		$new_rank = array(<br />
			"1"=>array('uid'=>132,'use_score'=>61570),<br />
			"2"=>array('uid'=>145,'use_score'=>51932),<br />
			"3"=>array('uid'=>121,'use_score'=>50932),<br />
			"4"=>array('uid'=>167,'use_score'=>40089),<br />
			"5"=>array('uid'=>100,'use_score'=>39089)<br />
		);<br />

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这样的两个数组，怎么进行比对得出排名的趋势，比如用户145排名上升一位了，121排名下降一位了，132排名保持不变。

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