php数组的排重、累加、排序处理，50分全部送上！
- PHP code
$t = array ( array( 'cid' => 123, 'hits' => 200, ), array( 'cid' => 456, 'hits' => 100, ), array( 'cid' => 789, 'hits' => 300, ), array( 'cid' => 123, 'hits' => 600, ), array( 'cid' => 456, 'hits' => 500, ), array( 'cid' => 789, 'hits' => 700, ),);
数组中有很多值是重复的cid，他们对应的hits不一样，希望进行cid排重，hits累加，再按照hits倒序排列，输出结果如下：
- PHP code
$t = array ( array( 'cid' => 789, 'hits' => 1000, ), array( 'cid' => 123, 'hits' => 800, ), array( 'cid' => 456, 'hits' => 600, ),);
多谢大家了！
[解决办法]
- PHP code
foreach($t as $v){ if(!$ar[$v['cid']]) $ar[$v['cid']]=$v; else $ar[$v['cid']]['hits']+=$v['hits']; }foreach($ar as $v) $k[]=$v[hits];array_multisort($k,SORT_DESC,$ar);print_r($ar);
[解决办法]
- PHP code
$t = array ( array( 'cid' => 123, 'hits' => 200, ), array( 'cid' => 456, 'hits' => 100, ), array( 'cid' => 789, 'hits' => 300, ), array( 'cid' => 123, 'hits' => 600, ), array( 'cid' => 456, 'hits' => 500, ), array( 'cid' => 789, 'hits' => 700, ),);$r = array();foreach($t as $v) { if(!isset($r[$v['cid']])) $r[$v['cid']] = $v; else $r[$v['cid']]['hits'] += $v['hits'];}usort($r, create_function('$a,$b', 'return $a["hits"]<$b["hits"];'));print_r($r);