PHP二維數組 去除特定重複值的有關問題

來源:互聯網
上載者:User
【求助】PHP二維數組 去除特定重複值的問題
原數組:
$arr = array(
array('id' => 1,'name' => 'aaa','uid'=>1),
array('id' => 2,'name' => 'bbb','uid'=>2),
array('id' => 3,'name' => 'ccc','uid'=>3),
array('id' => 4,'name' => 'ddd','uid'=>4),
array('id' => 5,'name' => 'ccc','uid'=>3),
array('id' => 6,'name' => 'bbb','uid'=>2),
array('id' => 7,'name' => 'bbb','uid'=>2),
array('id' => 8,'name' => 'fff','uid'=>6),
array('id' => 9,'name' => 'ccc','uid'=>3),
array('id' => 10,'name' => 'bbb','uid'=>2),
array('id' => 11,'name' => 'ddd','uid'=>4),
array('id' => 12,'name' => 'eee','uid'=>5),
array('id' => 13,'name' => 'fff','uid'=>6),
);

問題描敘:想擷取$arr中id為 1,3,5,7,9的值,但是‘name’和‘uid’的值不能有重複。舉例:id==3對應的name==ccc,但是id==5對應的 name==ccc,所以不取id為5的這一條,取它的下一條 id=6的值,如果id=6的值,和前面的還有重複,則再取下一條,以此類推。

如果想要取id為1,3,5,7,9的值,則想要的結果是:
$arr_new = array(
array('id' => 1,'name' => 'aaa','uid'=>1),
array('id' => 3,'name' => 'ccc','uid'=>3),
array('id' => 6,'name' => 'bbb','uid'=>2),
array('id' => 8,'name' => 'fff','uid'=>6),
); PHP 二維數組遞迴取值

分享到:


------解決方案--------------------
這個是演算法處理的方式有問題 他會遍曆當前已經取的資料 然後如果查到已經有了 則取下一條 -- 這種演算法的目的 是用來統計人數的 一個人發多張貼 也只算一個 如果要解決 只要把遍曆當前查詢的資料部分的代碼注釋即可
------解決方案--------------------
這個意思?
$arr = array( 
array('id' => 1,'name' => 'aaa','uid'=>1),
array('id' => 2,'name' => 'bbb','uid'=>2),
array('id' => 3,'name' => 'ccc','uid'=>3),
array('id' => 4,'name' => 'ddd','uid'=>4),
array('id' => 5,'name' => 'ccc','uid'=>3),
array('id' => 6,'name' => 'bbb','uid'=>2),
array('id' => 7,'name' => 'bbb','uid'=>2),
array('id' => 8,'name' => 'fff','uid'=>6),
array('id' => 9,'name' => 'ccc','uid'=>3),
array('id' => 10,'name' => 'bbb','uid'=>2),
array('id' => 11,'name' => 'ddd','uid'=>4),
array('id' => 12,'name' => 'eee','uid'=>5),
array('id' => 13,'name' => 'fff','uid'=>6),
);
$id = array(1,3,5,7,9);

foreach($arr as $v) $a[$v['id']] = $v;

$t = array();
foreach($id as $k) {
if(! in_array($a[$k]['name'], $t)) {
$res[] = $a[$k];
$t[] = $a[$k]['name'];
}else {
for($i=$k+1; $i if(! in_array($a[$i]['name'], $t)) {
$res[] = $a[$i];
$t[] = $a[$i]['name'];
break;
}
}
}
print_r($res);
Array
(
[0] => Array
(
[id] => 1
[name] => aaa
[uid] => 1
)

[1] => Array
(
[id] => 3
[name] => ccc
[uid] => 3
)

[2] => Array
(
[id] => 6
[name] => bbb
[uid] => 2
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