PHP二维数组去除特定重复值的有关问题

程序员文章站 2022-06-13 14:10:52

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【求助】PHP二维数组去除特定重复值的问题
原数组：
$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),
);

问题描叙：想获取$arr中id为 1,3,5,7,9的值，但是‘name’和‘uid’的值不能有重复。举例：id==3对应的name==ccc，但是id==5对应的 name==ccc，所以不取id为5的这一条，取它的下一条 id=6的值，如果id=6的值，和前面的还有重复，则再取下一条，以此类推。

如果想要取id为1,3,5,7,9的值，则想要的结果是：
$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 二维数组递归取值

分享到：
------解决方案--------------------
这个是算法处理的方式有问题他会遍历当前已经取的数据然后如果查到已经有了则取下一条 -- 这种算法的目的是用来统计人数的一个人发多张贴也只算一个如果要解决只要把遍历当前查询的数据部分的代码注释即可
------解决方案--------------------
这个意思？

$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