PHP无限循环问题答案

【问题标题】：PHP infinite loop issuePHP无限循环问题
【发布时间】：2014-09-03 08:52:48
【问题描述】：

我可以让正确的代码工作，但我希望能够使用对象和方法，但这是行不通的。重复数据库中的相同条目，直到查询崩溃。我看到其他人在 while 语句中有查询，但我认为我使用的方法应该只查询语句一次，但我可能错了。谢谢。

<?php
include '/functions/MySQL.php';
$MySQL = new MySQL;
$con = mysqli_connect("host","user","password","db");
$result = mysqli_query($con,"SELECT * FROM reportLogger WHERE Moderator='jackginger'");
while($row = mysqli_fetch_array($MySQL->getReports('jackginger'))) {
    $time           = $row['Time'];
    $moderator      = $row['Moderator'];
    $reason         = $row['Reason'];

    // Now for each looped row

    echo "<tr><td>".$time."</td><td>".$moderator."</td><td>".$reason."</td></tr>";
}
?>

分班

public function __construct(){
        $this->con = mysqli_connect("localhost","root","pass","Minecraft");
        // Check connection
        if (mysqli_connect_errno()) {
            echo "Failed to connect to MySQL: " . mysqli_connect_error();
        }
    }

    public function getUUID($username) {
        $result = mysqli_query($this->con,"SELECT UUID FROM loginLogger WHERE Username='" . $username . "'");
        return mysqli_fetch_array($result)[0];
    }

    public function getReports($username) {
        $result = mysqli_query($this->con,"SELECT * FROM reportLogger WHERE UUID='" . $this->getUUID($username) . "'");
        return $result;
    }

【问题讨论】：

您需要将$MySQL->getReports('jackginger') 存储在一个单独的变量中，然后用mysqli_fetch_array($your_temp_var) 调用它。
仅仅是因为查询被一遍又一遍地调用吗？
是的，原因是因为您告诉 $row 等于 mysqli 将获取的第一个元素。如果它有多个项目，它将继续获取第一个项目并且永远不会停止。即使它只有一项，它也会继续获取，因为它永远不会到达 $row === false;

标签： php mysql database mysqli

【解决方案1】：

每次您调用 while($row = mysqli_fetch_array($MySQL->getReports('jackginger'))) 时，您都在进行新的查询，因此它会一遍又一遍地获取相同的内容。

解决方案可能是：

<?php
include '/functions/MySQL.php';
$MySQL = new MySQL;
$con = mysqli_connect("host","user","password","db");
$result = mysqli_query($con,"SELECT * FROM reportLogger WHERE Moderator='jackginger'");
$store = $MySQL->getReports('jackginger');
while($row = mysqli_fetch_array($store)) {
    $time           = $row['Time'];
    $moderator      = $row['Moderator'];
    $reason         = $row['Reason'];

    // Now for each looped row

    echo "<tr><td>".$time."</td><td>".$moderator."</td><td>".$reason."</td></tr>";
}
?>

【讨论】：