可否根据下面的两个数组来判断趋势

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 />

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。

php

分享到： array('uid'=>132,'use_score'=>61570), ..." data-pics="">
------解决方案--------------------

$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 />
$new_rank = array(<br />
  "1"=>array('uid'=>132,'use_score'=>61570),<br />
  "2"=>array('uid'=>145,'use_score'=>51932),<br />
  "3"=>array('uid'=>121,'use_score'=>50932),<br />
  "4"=>array('uid'=>167,'use_score'=>40089),<br />
  "5"=>array('uid'=>100,'use_score'=>39089)<br />
);<br />
foreach($old_rank as $k=>$v) $old[$v['uid']] = $k;<br />
foreach($new_rank as $k=>$v) $new[$v['uid']] = $k;<br />
<br />
foreach($new as $k=>$v)<br />
  echo "$k 排名 $v " . ($v - $old[$k]) . '<br>';<br />

132 排名 1 0
145 排名 2 -1
121 排名 3 1
167 排名 4 -1
100 排名 5 1