php - 如果语句不填充错误数组 php

Question

好吧，我想要完成的是让 php 一次吐出多个错误，这样用户就不会感到厌烦。

示例:检查一项检查用户名是否存在，检查两项检查密码是否匹配，检查三项检查密码是否为 8 个字符或更多。用户在注册表中输入不存在的用户名、不匹配的密码和只有 5 个字符长的密码。那将是三个不同的错误。我试图一次输出所有三个，以便用户立即看到问题所在。在这种情况下，不必输出每个人和用户必须返回更改，然后再返回更改，然后再返回更改。

我感觉我的 if 语句设置有误。我知道这是一个用户错误，但我不知道它是什么。发生的情况是当我只触发一个错误时它工作得很好，但如果我触发多个错误数组是空的。

if(isset($_POST['rsn']) && isset($_POST['pw']) && isset($_POST['con_pw'])){

$rsn =  preg_replace('/\s+/u', '', $_POST['rsn']);

$pw = $_POST['pw'];

$hashed_pw = password_hash($pw, PASSWORD_BCRYPT);

$con_pw = $_POST['con_pw'];

$query = $conn->prepare("SELECT rsn, rank_num, active FROM users WHERE rsn = :rsn");

$query->execute(array(":rsn" => $rsn));

$error = array();

while($row = $query->fetch(PDO::FETCH_ASSOC)){

    $db_rsn = $row['rsn'];

    $rank_num = $row['rank_num'];

    $active = $row['active'];

    if($rsn != $db_rsn){

        $error[] = "Sorry, but the rsn: $rsn doesn\'t exist in or database";

        if($pw != $con_pw){

            $error[] = "Sorry, but your passwords dont match";

            if($pw < 8){

                $error[] = "Sorry, but your password must be 8 or more characters";

                if($rank_num != "7" || $rank_num != "8" || $rank_num != "9" || $rank_num != "10" || $rank_num != "11" || $rank_num != "12"){

                    $error[] = "Sorry, but you dont have the permissions to register";

                }

            }

        }

    }

}

print_r($error);//output = array()

var_dump($error);//output = array(0)

这不是我合并问题区域时的全部代码。其余代码只是一个 foreach 循环迭代错误如果它不为空如果它是将用户插入 db

Answer 1

我不确定您为什么在提取查询期间使用 while 循环。如果你一次显示所有错误，那么你可以使用下面的代码:(虽然没有测试)让我知道它的工作与否。

if(isset($_POST['rsn']) && isset($_POST['pw']) && isset($_POST['con_pw'])){

$rsn =  preg_replace('/\s+/u', '', $_POST['rsn']);

$pw = $_POST['pw'];

$hashed_pw = password_hash($pw, PASSWORD_BCRYPT);

$con_pw = $_POST['con_pw'];

$query = $conn->prepare("SELECT rsn, rank_num, active FROM users WHERE rsn = :rsn");

$query->execute(array(":rsn" => $rsn));

$error = array();

while($row = $query->fetch(PDO::FETCH_ASSOC)){

    $db_rsn = $row['rsn'];

    $rank_num = $row['rank_num'];

    $active = $row['active'];
    }
    if($rsn != $db_rsn){

        $error[] = "Sorry, but the rsn: $rsn doesn\'t exist in or database";
   }

   if($pw != $con_pw){

            $error[] = "Sorry, but your passwords dont match";
   }

   if($pw < 8){

                $error[] = "Sorry, but your password must be 8 or more characters";
   }

   if($rank_num != "7" || $rank_num != "8" || $rank_num != "9" || $rank_num != "10" || $rank_num != "11" || $rank_num != "12"){

                    $error[] = "Sorry, but you dont have the permissions to register";

   }

}


print_r($error);//output

var_dump($error);//output