我正在练习 PHP 和数据库创建，并且想根据输入错误更改我的消息。我不知道如何将更改后的消息传递回去，并且希望得到任何帮助。
这是我的注册页面
<main>
<h1>Signup<h1>
<h3>
<?php
echo $errorMsg;
?>
<h3>
<form action="includes/signup.inc.php" method="post">
<input type="text" name="uid" placeholder="Username">
<input type="text" name="mail" placeholder="E-mail">
<input type="password" name="pwd" placeholder="Password">
<input type="password" name="pwd_repeat" placeholder="Repeat Password">
<button type="submit" name="signup-submit">Submit</button>
<form>
</main>
这是我的处理页面
if(isset($_POST['signup-submit'])){
require 'dbh.inc.php';
$Name = $_POST['uid'];
$Email= $_POST['mail'];
$Password = $_POST['pwd'];
$PasswordRepeat = $_POST['pwd_repeat'];
if(empty($Name) || empty($Email) || empty($Password) || empty($PasswordRepeat)){
header("Location: ../signup.php?error=emptyfields=1"); //Check if any field is empty
exit();
}
else if(!filter_var($Email, FILTER_VALIDATE_EMAIL) && !preg_match("/^[a-zA-Z0-9]*$/", $Name)){
header("Location: ../signup.php?error=invalidamil&uid"); //Check if username and email is valid input
exit();
}
else if(!filter_var($Email, FILTER_VALIDATE_EMAIL)){
header("Location: ../signup.php?error=invalidamil&uid=".$Name); //Check if email is valid input
exit();
}
else if($Password !== $PasswordRepeat){
header("Location: ../signup.php?error=passwordCheck&uid=".$Name."&mail=".$Email); // Check if passwords don't match
exit();
}
$sql2 = "SELECT UserName FROM dbo.MainTable WHERE UserName = ?";
$params2 = array($Name, SQLSRV_PARAM_IN);
$stmt2 = sqlsrv_query($conn, $sql2, $params2);
if($stmt2 === false)
{
die(print_r(sqlsrv_errors(), true));
exit();
}
我不确定在哪里放置更改消息变量，因为我无法让它在 if 语句中工作。
胡子哥哥