$t = array (
array(
'cid' => 123,
'hits' => 200,
),
array(
'cid' => 456,
'hits' => 100,
),
array(
'cid' => 789,
'hits' => 300,
),
array(
'cid' => 123,
'hits' => 600,
),
array(
'cid' => 456,
'hits' => 500,
),
array(
'cid' => 789,
'hits' => 700,
),
);数组中有很多值是重复的cid,他们对应的hits不一样,希望进行cid排重,hits累加,再按照hits倒序排列,输出结果如下:$t = array (
array(
'cid' => 789,
'hits' => 1000,
),
array(
'cid' => 123,
'hits' => 800,
),
array(
'cid' => 456,
'hits' => 600,
),
);多谢大家了!
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($ar);
Array
(
[0] => Array
(
[cid] => 789
[hits] => 1000
) [1] => Array
(
[cid] => 123
[hits] => 800
) [2] => Array
(
[cid] => 456
[hits] => 600
))
array(
'cid' => 123,
'hits' => 200,
),
array(
'cid' => 456,
'hits' => 100,
),
array(
'cid' => 789,
'hits' => 300,
),
array(
'cid' => 123,
'hits' => 600,
),
array(
'cid' => 456,
'hits' => 500,
),
array(
'cid' => 789,
'hits' => 700,
),
);$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);Array
(
[0] => Array
(
[cid] => 789
[hits] => 1000
) [1] => Array
(
[cid] => 123
[hits] => 800
) [2] => Array
(
[cid] => 456
[hits] => 600
))