<?php
// print_r($_POST);
$error = "";
$successMessage = "";
if($_POST){
if(!$_POST["email"]){
$error .= "An email address is required.<br>";
}
if(!$_POST["content"]){
$error .= "An content address is required.<br>";
}
if(!$_POST["sub"]){
$error .= "An subject address is required.<br>";
}
if($_POST['email'] && filter_var($_POST,FILTER_VALIDATE_EMAIL) === false ){
$error .= "The email is invalid.<br>";
}
if($error != ""){
$error = '<div class="alert alert-danger" role="alert"><p><strong>There were error(s) in your form</strong></p>'.$error.'</div>';
}
else{
$emailto = "[email protected]";
$subject = $_POST['sub'];
$content = $_POST['content'];
$headers = "From: ".$_POST['email'];
if(mail($emailto,$sub,$content,$headers)){
$successMessage = '<div class="alert alert-success" role="alert">Your message was sent we\'ll get back to you ASAP.</div>';
}
else{
$error = '<div class="alert alert-danger" role="alert"><p><strong>Your message couldn\'t be sent please try again!</div>';
}
}
}
?>
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Bootstrap demo</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" integrity="sha384-GJzZqFGwb1QTTN6wy59ffF1BuGJpLSa9DkKMp0DgiMDm4iYMj70gZWKYbI706tWS" crossorigin="anonymous">
</head>
<body>
<div class="container">
<h1>Get in touch!</h1>
<div id="error"><? echo $error.$successMessage; ?></div>
<form method="post">
<div class="mb-3">
<label for="email" class="form-label">Email address</label>
<input type="email" class="form-control" id="email" name="email" aria-describedby="emailHelp">
<div id="emailHelp" class="form-text">We'll never share your email with anyone else.</div>
</div>
<div class="mb-3">
<label for="subject" class="form-label">Subject</label>
<input type="text" class="form-control" id="subject" name="sub">
</div>
<div class="mb-3 form-check">
<input type="checkbox" class="form-check-input" id="exampleCheck1">
<label class="form-check-label" for="exampleCheck1">Check me out</label>
</div>
<div class="mb-3">
<label for="content" class="form-label">What would you like to ask us?</label>
<textarea class="form-control" id="content" name="content" rows="3"></textarea>
</div>
<button type="submit" id="submit" class="btn btn-primary">Submit</button>
</form>
</div>
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/umd/popper.min.js" integrity="sha384-wHAiFfRlMFy6i5SRaxvfOCifBUQy1xHdJ/yoi7FRNXMRBu5WHdZYu1hA6ZOblgut" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.min.js" integrity="sha384-B0UglyR+jN6CkvvICOB2joaf5I4l3gm9GU6Hc1og6Ls7i6U/mkkaduKaBhlAXv9k" crossorigin="anonymous"></script>
<!-- <script type="text/javascript">
$("form").submit(function(e){
// e.preventDefault();
var error = "";
if($("#email").val() == ""){
error += "The email field is required.<br>";
}
if($("#subject").val() == ""){
error += "The subject field is required.<br>";
}
if($("#content").val() == ""){
error += "The content field is required.";
}
if(error != ""){
$("#error").html('<div class="alert alert-danger" role="alert"><p><strong>There were error(s) in your form</strong></p>'+error+'</div>');
return false;
}
else{
return true;
// $("form").unbind("submit").submit();
}
});
</script> -->
</body>
</html>
我创建了一个简单的表单，其中包含电子邮件、关于和主题字段以及一个提交按钮。当这些字段留空时，错误应该显示在屏幕顶部但错误没有出现。我已经注释掉了底部的 javascript 代码做同样的工作，但 PHP 代码不工作。有人可以帮我找出我的代码中的问题吗？