在循环中返回函数

时间:2013-08-18 01:33:56

标签: php loops

我有一个函数,它检查一个查询,然后使用while循环来提取数据,我想返回这些数据,但我仍然希望它增加,但我读到返回终止一个函数,因此会使它无法增加。有没有解决的办法?

$this->messages = array();
while($row = $data) {
                $this->messages[$i]['id'] = $row['id'];
                $this->messages[$i]['title'] = $row['title'];
                $this->messages[$i]['message'] = $row['message'];
                $i++;

这个循环在函数内部,我想继续,直到循环完成,但是我不能返回任何值..是否有解决这个问题?

谢谢

编辑:

<?php

function Message($username){

            $query = "SELECT * FROM msg WHERE `to` = '".$this->userid."' && `to_viewed` = '0' && `to_deleted` = '0' ORDER BY `created` DESC";   
            $stmt = $this->connection->prepare($query);
            $stmt->execute();

    $data = $stmt->fetch(PDO::FETCH_ASSOC);
    $num_rows = $stmt->fetchColumn();

        if($num_rows) {
            $i=0;
            $this->messages = array();
            while($row = $data) {
// want to return these 3 for each result
                $this->messages[$i]['id'] = $row['id'];
                $this->messages[$i]['title'] = $row['title'];
                $this->messages[$i]['message'] = $row['message'];

                $i++;
            }
        } else {
            return 1; 
        }
    }

?>

1 个答案:

答案 0 :(得分:4)

使用PDO::fetchAll(),它返回所有结果的数组,而不是一次返回一行:

function Message($username){

    $query = "SELECT * FROM msg WHERE `to` = '".$this->userid."' && `to_viewed` = '0' && `to_deleted` = '0' ORDER BY `created` DESC";   
    $stmt = $this->connection->prepare($query);
    $stmt->execute();
    $this->messages = $stmt->fetchAll(PDO::FETCH_ASSOC);
    return $this->messages;
}

但要教你一些循环(一个CS 101概念 - 人们学习如何编程会发生什么?),这是你自己编写代码的方法:

    $stmt->execute();
    $this->messages = array();
    while ($row = $stmt->fetch(PDO::FETCH_ASSOC));
        $this->messages[] = $row;
    }
    return $this->messages;