我有一個html表單,我要3個字段爲必填字段。如果用戶沒有填寫這些字段中的任何一個,則表單不應該被提交,並且它應該告訴用戶填寫必填字段。我用過PDO,我不知道該怎麼做。如果有人能幫助我。在下面我已經給我的HTML和PHP文件。使用PHP PDO的html表單中的必填字段
HTML:
<html>
<head>
<title>Data Insertion</title>
</head>
<body>
<p><span class="Error">* required field.</span></p>
<form method="post" action="su.php">
<h2>Please Fill In Details</h2>
<label for="name">Name </label>
<input type="text" Placeholder="Enter your name" name="name" id="name" />
<span class="Error">*</span>
<br />
<br />
<label for="age">Age </label>
<input type="text" name="age" id="age" placeholder="Enter your age" />
<br />
<br />
<label for="mailid">MailId </label>
<input type="text" name="mailid" id="mailid" placeholder="Enter your Mail Id" />
<span class="Error">*</span>
<br />
<br />
<label for="gender">Gender </label>
<br />
<label for="male">Male </label>
<input type="radio" name="gender" id="gender" value="Male" id="male" />
<label for="female">Female </label>
<input type="radio" name="gender" id="gender" value="Female" id="female" />
<br />
<br />
<label for="qualification">Qualification </label>
<select name="qualification" value="Qualification" id="qualification">
<option value="B.E">SSLC</option>
<option value="P.G">HSC</option>
<option value="SSLC">UG</option>
<option value="HSC">PG</option>
</select>
<br /><br />
<label for="hobbies">Hobbies </label>
<br />
<input type="checkbox" name="hobbies" id="hobbies" value="Cricket" />Cricket
<input type="checkbox" name="hobbies" id="hobbies" value="Music" />Music
<input type="checkbox" name="hobbies" id="hobbies" value="Swimming" />Swimming
<br /><br />
<label for="textarea">Address </label>
<br />
<textarea name="address" id="textarea" rows="15" cols="30"></textarea>
<span class="Error">*</span>
<br /><br />
<input type="submit" name="submit" value="Submit" />
</form>
</body>
</html>
PHP:
<?php
$servername = 'localhost';
$username = 'root';
$password = '';
try {
$conn = new PDO("mysql:host=$servername;dbname=testing", $username, $password);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
if(isset($_POST['submit'])){
$name = $_POST['name'];
$age = $_POST['age'];
$mailid = $_POST['mailid'];
$gender = $_POST['qualification'];
$hobbies = $_POST['address'];
if($name !='' || $mailid !='' || $address !=''){
$sql = "Insert into user (Name, Age, MailId, Gender, Qualification, Hobbies, Address)
values ('".$_POST["name"]."', '".$_POST["age"]."', '".$_POST["mailid"]."', '".$_POST["gender"]."', '".$_POST["qualification"]."', '".$_POST["hobbies"]."', '".$_POST["address"]."')";
$conn->exec($sql);
echo "Thank you for registering";
} else {
echo "<p>Insertion failed <br/> Please enter the required fields !";
}}
}
catch(PODException $e)
{
echo $sql . "<br>" . $e->getMessage();
}
?>
你必須使用JavaScript的。 – Jens
即使您可以使用html5屬性。 –
我想用PHP來做到這一點。不想使用「必需的屬性」。 –