php多维数组去重,该如何解决

php多维数组去重
php多维数组去重，怎样去掉name为a的多余的那一个呢？
Array
(
    [0] => Array
        (
            [id] => 79
            [name] => a
        )

    [1] => Array
        (
        
            [id] => 79
            [name] => a
        )
    [2] => Array
        (
            [id] => 78
            [name] => b
        )
    [3] => Array
        (

            [id] => 36
            [name] => c
        )
)
------解决思路----------------------

$ar = array (<br />  0 => <br />  array (<br />    'id' => '79',<br />    'name' => 'a',<br />  ),<br />  1 => <br />  array (<br />    'id' => '79',<br />    'name' => 'a',<br />  ),<br />  2 => <br />  array (<br />    'id' => '78',<br />    'name' => 'b',<br />  ),<br />  3 => <br />  array (<br />    'id' => '36',<br />    'name' => 'c',<br />  ),<br />);<br />foreach($ar as $k=>$f) {<br />  foreach($ar as $p=>$t) if($k != $p && $f == $t) unset($ar[$k]);<br />}<br />print_r($ar);

Array<br />(<br />    [1] => Array<br />        (<br />            [id] => 79<br />            [name] => a<br />        )<br /><br />    [2] => Array<br />        (<br />            [id] => 78<br />            [name] => b<br />        )<br /><br />    [3] => Array<br />        (<br />            [id] => 36<br />            [name] => c<br />        )<br /><br />)<br /><br />

------解决思路----------------------

<br />$arr=array(<br />     0=>array(<br />        'id'=>79,<br />        'name'=>'a'<br />         ),<br />     1=>array(<br />        'id'=>79,<br />        'name'=>'a'<br /><br />      ),<br />     2=>array(<br />        'id'=>78,<br />        'name'=>'b'<br />     ),<br />     3=>array(<br />        'id'=>36,<br />        'name'=>'c'<br />     ),<br />);<br />$item=array();<br />foreach($arr as $k=>$v){<br />    if(!isset($item[$v['id']])) $item[$v['id']]=$v;<br />}<br />print_r(array_values($item));<br />

<br />Array<br />(<br />    [0] => Array<br />        (<br />            [id] => 79<br />            [name] => a<br />        )<br /><br />    [1] => Array<br />        (<br />            [id] => 78<br />            [name] => b<br />        )<br /><br />    [2] => Array<br />        (<br />            [id] => 36<br />            [name] => c<br />        )<br /><br />)<br /><br />

------解决思路----------------------

<br /><?php<br /><br />$ar = array (<br />  0 => <br />  array (<br />    'id' => '79',<br />    'name' => 'a',<br />  ),<br />  1 => <br />  array (<br />    'id' => '79',<br />    'name' => 'a',<br />  ),<br />  2 => <br />  array (<br />    'id' => '78',<br />    'name' => 'b',<br />  ),<br />  3 => <br />  array (<br />    'id' => '36',<br />    'name' => 'c',<br />  ),<br />);<br /><br /><br />$temp =array();<br />$result =array();<br /><br />foreach($ar as $item){<br />	$temp[] = json_encode($item);<br />}<br /><br />$temp = array_unique($temp);<br /><br />foreach($temp as $item){<br />	$result[] = json_decode($item,true);<br />}<br /><br />var_dump($result);

 只是提供新思路  效率不高   勿用 

<br />array(3) {<br />  [0]=><br />  array(2) {<br />    ["id"]=><br />    string(2) "79"<br />    ["name"]=><br />    string(1) "a"<br />  }<br />  [1]=><br />  array(2) {<br />    ["id"]=><br />    string(2) "78"<br />    ["name"]=><br />    string(1) "b"<br />  }<br />  [2]=><br />  array(2) {<br />    ["id"]=><br />    string(2) "36"<br />    ["name"]=><br />    string(1) "c"<br />  }<br />}

------解决思路----------------------
SELECT DISTINCT(`id`) AS `id` , name FROM `TABLE`