如何添加PHP验证到我的联系人
问题描述：
我用css，html，javascript和一个小小的php做了一个网站。我把它托管在托管网站上，但是我在表单的服务器端验证方面存在问题。如何添加PHP验证到我的联系人
这只是一个简单的联系形式：
名 姓 电子邮件 消息（文本域） 提交按钮
我有JavaScript验证，它工作正常。除非输入了正确数量的字符，否则表单根本不会提交，但显然，如果用户禁用了js，则该表单无用。我也终于得到了表格，通过电子邮件发送给我的个人电子邮件...但显然我需要服务器端验证。
今天是我第一天真的进入php，我希望今天完成php验证，但是我观看的所有视频中，我只是更加困惑。所有我想要做的只是让它，以便如果用户已禁用JavaScript无论出于何种原因，或者如果他将字段留空，表单将不会提交...
Anyeay，我正在研究这一切今天的一天，打算让表格发送到我的电子邮件，我终于完成了。然后意识到我没有服务器端验证。我花了几个小时研究它，并尝试它无济于事。任何人都可以给我上面描述的那种形式的php验证代码吗？这是我的企业网站，所以越早我可以有一个工作联系表格，更好的...
这是我做的html联系表。
<form action="message_sent.php" method="POST" onSubmit="return validateTextbox();">
<p class="message">
<div class="row">
<label for="firstname"><!--First Name (Required):--> </label>
<input type="text" id="firstname" name="first_name" size="40" placeholder="First Name (Required)"></br> </br> </div>
<div class="row">
<label for="lastname"><!--Last Name (Required):--> </label>
<input type="text" id="lastname" name="last_name" size="40" placeholder="Last Name (Required)"/> </br> </br></div>
<div class="row">
<label for="email"><!--Your Email (Required):--></label>
<input type="email" id="email" name="email" size="40" placeholder="Email (Required)"/> </br> </br></div>
<!--<p class="yourMessage">Your Message (10 Character Minimum):</p>-->
<textarea id="theform" rows="30" cols="80" name="message" placeholder="Your Message (10 Character Minimum):"></textarea></br>
</p>
<input type="submit" name="submit" onclick="return val();" value="SUBMIT">
</form>
</body>
</html>
这里是JavaScript验证：
/*============================ CONTACT US PAGE ==========================*/
function validateTextbox() {
var box = document.getElementById("firstname");
var box2 = document.getElementById("lastname");
var box3 = document.getElementById("email");
var box4 = document.getElementById("theForm");
if (box.value.length < 1 || box2.value.length < 1 || box3.value.length < 5){
alert("You must enter a value");
box.focus();
box.style.border = "solid 3px red";
box2.focus();
box2.style.border = "solid 3px red";
box3.focus();
box3.style.border = "solid 3px red";
return false;
}
}
function val(){
if(document.getElementById("theform").value.length < 10
&& document.getElementById("theform").value.length > 0){
alert("You must enter at least 50 characters. Tell us what you need so we can better assist you.");
return false;
}
else if(document.getElementById("theform").value.length === 0){
alert("You cannot submit an empty form.");
theform.focus();
theform.style.border = "solid 3px red";
return false;
}
}
/*function val(){
if(document.getElementById("theform").value==null || document.getElementById("theform").value==""){
alert("The Message field cannot be blank.");
return false;
}
*/
/*
*/
/*=======================|| box4.value.length < 70) ================================================ */
/*========= CONTACT PAGE========================================*/
/*
function contactPage(){
alert("This Contact Form is NOT OPERATIONAL.");
这里是PHP提交成功页面...我曾经有过的形式发送到我的邮箱代码：
<?php
$first_name=$_POST['first_name'];
$last_name=$_POST['last_name'];
$email=$_POST['email'];
$message=$_POST['message'];
$to="[email protected]";
$subject="A visitor has sent you a new message";
$body="You have received a message from: \n\n
First Name: $first_name\n
Last Name: $last_name\n
Email: $email\n\n
MESSAGE: $message";
mail($to, $subject, $body);
print "<p>Message Sent! <a href='index.html'>Click. here</a> to return to the homepage</p>"
?>
答
这只是一个基本的空检查验证。
PHP中的验证并不是非常困难。
if ($_SERVER["REQUEST_METHOD"] == "POST") {
if(trim($_POST['firstname']) === ''){
echo 'Please enter firstname';
}
}
您还可以了解一些验证这里 http://www.w3schools.com/php/php_form_validation.asp
+0
好的，我在第一篇文章中添加了我的代码。这是html，javascript和pbp代码 – Shutter
答
简单而完整的例子：
<!DOCTYPE HTML>
<html>
<head>
<style>
.error {color: #FF0000;}
</style>
</head>
<body>
<?php
//Define variable as empty to avoid "undefined variable error".
$FnameErr = $LnameErr = $emailErr = ""; //Each variable contain error string of specific field.
$fname = $lname = $email = $message = ""; //Main inputed data of specific field
if ($_SERVER["REQUEST_METHOD"] == "POST") { //check if request is posted.
//First name check
if (empty($_POST["fname"])) { // check if empty then assign a error string in spacific variable
$FnameErr = "First Name is required";
}else{ // if not empty then store as right data
$fname = filter_data($_POST["fname"]); //filter with unexpected special char and trim.
}
//Last name
if (empty($_POST["lname"])) { // check if empty then assign a error string in spacific variable
$LnameErr = "Last Name is required";
}else{ // if not empty then store as right data
$lname = filter_data($_POST["lname"]); //filter with unexpected special char and trim.
}
//email
if (empty($_POST["email"])) { // check if empty then assign a error string in spacific variable
$emailErr = "Email is required";
} else {
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) { // validate email with php build-in fucntion.
$emailErr = "Invalid email format";
}else{ // if not empty and valide email then store as right data
$email = filter_data($_POST["email"]); //filter with unexpected special char and trim.
}
}
//message with no validation
if (empty($_POST["message"])) {
$message = "";
} else {
$message = filter_data($_POST["message"]);
}
//Database query
if($FnameErr =="" && $LnameErr =="" && $emailErr==""){
//MYSQL insert statement that you know
// $sql = "INSERT INTO tablename .................."; values = $fname; $lname; $email; $message;
}
}
// A function to trim data and remove special charecter
function filter_data($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
First Name: <input type="text" name="fname" value="">
<span class="error">* <?php echo $FnameErr;?></span><br><br>
Last Name: <input type="text" name="lname" value="">
<span class="error">* <?php echo $LnameErr;?></span><br><br>
E-mail: <input type="text" name="email" value="">
<span class="error">* <?php echo $emailErr;?></span>
<br><br>
Message: <textarea name="message" rows="5" cols="40"></textarea>
<br><br>
<input type="submit" name="submit" value="Submit">
</form>
<?php
echo "<h2>Your Input:</h2>";
echo $fname;
echo "<br>";
echo $lname;
echo "<br>";
echo $email;
echo "<br>";
echo $message;
?>
</body>
</html>
请发表您的POST代码，并显示到目前为止你已经尝试过的情况。我们可以纠正并加强它。 –