求助array数组的操作

Question

$a=array(1=>array{"name"=>"张三", "score"=>"7"},
         2=>array{"name"=>"李四", "score"=>"3"},
         3=>array{"name"=>"王五", "score"=>"6"},
         4=>array{"name"=>"刘六", "score"=>"9"},
         5=>array{"name"=>"张三", "score"=>"2"},
         6=>array{"name"=>"李四", "score"=>"8"}
);
比如我现在有这样一个数组，我想做到张三李四的score都叠加，去掉重复项目，然后按score在递减排序该怎么弄？最终变成类似于这样$a=array(1=>array{"name"=>"李四", "score"=>"11"},
         2=>array{"name"=>"张三", "score"=>"9"},        
         3=>array{"name"=>"刘六", "score"=>"9"},
         4=>array{"name"=>"王五", "score"=>"6"}
);

Answer 1

重复相加就用循环吧 
排序
function orderScore($x,$y)
{
  if($x['score']==$y['score']){return 0;}
  if($x['score']>$y['score']){return 1;}
  if($x['score']<$y['score']){return -1;}
}
ursort($a,'orderScore');我的思路，不知道对不对。、

Answer 2

$a=array(1=>array("name"=>"张三", "score"=>"7"),
         2=>array("name"=>"李四", "score"=>"3"),
         3=>array("name"=>"王五", "score"=>"6"),
         4=>array("name"=>"刘六", "score"=>"9"),
         5=>array("name"=>"张三", "score"=>"2"),
         6=>array("name"=>"李四", "score"=>"8")
);$r = array();
foreach($a as $v) {
  if(isset($r[$v['name']])) $r[$v['name']]['score'] += $v['score'];
  else $r[$v['name']] = $v;
}
print_r($r);
Array
(
    [张三] => Array
        (
            [name] => 张三
            [score] => 9
        )    [李四] => Array
        (
            [name] => 李四
            [score] => 11
        )    [王五] => Array
        (
            [name] => 王五
            [score] => 6
        )    [刘六] => Array
        (
            [name] => 刘六
            [score] => 9
        ))

Answer 3

可否再详细点  ursort是什么函数？ 我不是很懂。希望不吝赐教，非常感谢。

Answer 4

<?php
$a=array(1=>array("name"=>"张三", "score"=>"7"),
         2=>array("name"=>"李四", "score"=>"3"),
         3=>array("name"=>"王五", "score"=>"6"),
         4=>array("name"=>"刘六", "score"=>"9"),
         5=>array("name"=>"张三", "score"=>"2"),
         6=>array("name"=>"李四", "score"=>"8")
);
$count = count($a);$r = array();//新数组用来存入a的值foreach($a as $v) {
  if(isset($r[$v['name']])) $r[$v['name']]['score'] += $v['score'];
  else $r[$v['name']] = $v;
}$a = $r;function orderScore($x,$y)
{
  if($x['score']==$y['score']){return 0;}
  if($x['score']>$y['score']){return -1;}
  if($x['score']<$y['score']){return 1;}
}
usort($a,'orderScore');
print_r($a);
?> 借用二楼的方法,高手很多啊，鸭梨很大。。
完整代码.....