Question

我从DB PDO结果中获得了这个数组，在那儿用户打了个招呼，在那里，我从DB PDO结果中得到了这个数组，用户在这里做了一些反馈，因此可以重复项目，因为反馈既可以是评论或建议

我的数据库查询

$this->sql = $this->dbh->query("SELECT idProject, title, excerpt 
FROM projects AS up
JOIN comments AS co ON up.idProject = co.idProjectComment 
WHERE co.idUserComment = $id");
$this->results = $this->sql->fetchAll(PDO::FETCH_ASSOC);

我的结果

print_r($this->results);
Array
(
[0] => Array
    (
        [idProject] => 25
        [title] => Lorem Ipsum
        [excerpt] => Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut...
    )

[1] => Array
    (
        [idProject] => 25
        [title] => Lorem Ipsum
        [excerpt] => Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut...
    )

[2] => Array
    (
        [idProject] => 25
        [title] => Lorem Ipsum
        [excerpt] => Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut...
    )

[3] => Array
    (
        [idProject] => 27
        [title] => Lorem Ipsum
        [excerpt] => Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut...
    )

[4] => Array
    (
        [idProject] => 28
        [title] => Lorem Ipsum
        [excerpt] => Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut...
    )

[5] => Array
    (
        [idProject] => 28
        [title] => Lorem Ipsum
        [excerpt] => Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut...
    )

)

如您所见，我有重复的项目，但是我需要摆脱重复的项目

任何人都可以帮我提取一个项目而不提取重复的项目

我只想获得项目25、27和28

谢谢！

编辑：添加了Mysql标记+ for循环

$this->json['projects'] = array();

        for($i=0; count($this->results) > $i; $i++){

            $this->json['projects'][$i]['projectId']    = $this->results[$i]['idProject'];
            $this->json['projects'][$i]['title']        = $this->results[$i]['title'];
            $this->json['projects'][$i]['excerpt']      = $this->results[$i]['excerpt'];

        }

return json_encode($this->json, JSON_PRETTY_PRINT);

Answer 1

在SQL查询中，在SELECT之后添加DISTINCT

从重复项中清除阵列

1 个答案: