这样的二维数组合并并去掉重复值，该如何做

这样的二维数组合并并去掉重复值，该怎么做
这样的二维数组合并并去掉重复值（attr_id，attr_name，attr_value三个字段都相同的则保留一个去除一个）

PHP code

<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Array(    [0] => Array        (            [attr_id] => 16950            [attr_name] => 台式机CPU品牌            [attr_value] => AMD        )    [1] => Array        (            [attr_id] => 16951            [attr_name] => 台式机操作系统            [attr_value] => Linux        ))Array(    [0] => Array        (            [attr_id] => 16955            [attr_name] => 售后服务            [attr_value] => 一年        ))

------解决方案--------------------
function array_multi_unique($ar) {
$ar = array_map('serialize', $ar);
$ar = array_unique($ar);
return array_map('unserialize', $ar);
}

print_r( array_multi_unique($a) );
------解决方案--------------------
在唠叨老大的基础上改改

PHP code

<?php $new = Array(    '0' => Array        (            'attr_id' => '16950',            'attr_name' => '台式机CPU品牌',            'attr_value' => 'AMD',            'attr_type' => 1,            'belong' => 'goods_sku'        ),    '1' => Array        (            'attr_id' => '16951',            'attr_name' => '台式机操作系统',            'attr_value' => 'Linux',            'attr_type' => 2,            'belong' => 'goods_sku'        ),    '2' => Array        (            'attr_id' => '16955',            'attr_name' => '售后服务',            'attr_value' => '一年',            'attr_type' => 2,            'belong' => 'goods_sku'        ),    '3' => Array        (            'attr_id' => '16950',            'attr_name' => '台式机CPU品牌',            'attr_value' => 'AMD',            'attr_type' => 1,            'belong' => 'goods'        ));// 老大的基础上改改function array_multi_unique($ar, $filter=array()) {    if(!empty($filter)) {        $_v = array_fill_keys($filter, ' ');        $_ar = array();        foreach($ar as $k => $v) {            $_ar[$k] = array_intersect_key($v, $_v);        }    } else {        $_ar = $ar;    }    $_ar = array_map('serialize', $_ar);    $_ar = array_unique($_ar);    $_ar = array_map('unserialize', $_ar);    if(!empty($filter)) {                return array_intersect_key($ar, $_ar);    } else {        return $_ar;    }}print_r(array_multi_unique($new, array('attr_id', 'attr_name', 'attr_value')));<div class="clear">
                 
              
              
        
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