能否根据下面的两个数组来判断趋势?
$old_rank = array(
"1"=>array('uid'=>132,'use_score'=>61570),
"2"=>array('uid'=>121,'use_score'=>50932),
"3"=>array('uid'=>145,'use_score'=>46789),
"4"=>array('uid'=>100,'use_score'=>39089),
"5"=>array('uid'=>167,'use_score'=>29089)
);
$new_rank = array(
"1"=>array('uid'=>132,'use_score'=>61570),
"2"=>array('uid'=>145,'use_score'=>51932),
"3"=>array('uid'=>121,'use_score'=>50932),
"4"=>array('uid'=>167,'use_score'=>40089),
"5"=>array('uid'=>100,'use_score'=>39089)
);
$old_rank = array(132 排名 1 0
"1"=>array('uid'=>132,'use_score'=>61570),
"2"=>array('uid'=>121,'use_score'=>50932),
"3"=>array('uid'=>145,'use_score'=>46789),
"4"=>array('uid'=>100,'use_score'=>39089),
"5"=>array('uid'=>167,'use_score'=>29089)
);
$new_rank = array(
"1"=>array('uid'=>132,'use_score'=>61570),
"2"=>array('uid'=>145,'use_score'=>51932),
"3"=>array('uid'=>121,'use_score'=>50932),
"4"=>array('uid'=>167,'use_score'=>40089),
"5"=>array('uid'=>100,'use_score'=>39089)
);
foreach($old_rank as $k=>$v) $old[$v['uid']] = $k;
foreach($new_rank as $k=>$v) $new[$v['uid']] = $k;
foreach($new as $k=>$v)
echo "$k 排名 $v " . ($v - $old[$k]) . '<br>';