create and validate a registration form
PROGRAM:
<!DOCTYPE
HTML>
<html>
<head>
<style>
.error
{color: #FF0000;}
</style>
</head>
<body>
<?php
/*
define variables and set to empty values */
$nameErr
= $emailError = $mobileError ="";
$name
= $email = $mobile = "";
if
($_SERVER["REQUEST_METHOD"] == "POST") {
if (empty($_POST["name"])) {
$nameErr = "Name is required";
}
else {
$name =
test_input($_POST["name"]);
/* check if name only contains letters and
whitespace */
if (!preg_match("/^[a-zA-Z ]*$/",$name))
{
$nameErr = "Only letters and white
space allowed";
}
}
if (empty($_POST["name"])) {
$mobileError = "Name is
required";
} else {
$mobile =
test_input($_POST["mobile"]);
/* check if name only contains letters and
whitespace */
if (!preg_match('/^[0-9]{10}+$/', $mobile))
{
$mobileError = "10 digit
Number";
}
}
if (empty($_POST["email"])) {
$emailError = "Email is
required";
} else {
$email =
test_input($_POST["email"]);
/* check if e-mail address is well-formed
*/
if (!filter_var($email,
FILTER_VALIDATE_EMAIL)) {
$emailError = "Invalid email
format";
}
}
}
function
test_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
<form
method="post" action="<?php echo
htmlspecialchars($_SERVER["PHP_SELF"]);?>">
Name: <input type="text"
name="name" value="<?php echo $name;?>">
<span class="error">*
<?php echo $nameErr;?></span>
<br><br>
Mobile: <input type="text"
name="mobile" value="<?php echo $mobile;?>">
<span class="error">*
<?php echo $mobileError;?></span>
<br><br>
E-mail: <input type="text"
name="email" value="<?php echo $email;?>">
<span class="error">*
<?php echo $emailError;?></span>
<br><br>
<input type="submit"
name="submit" value="Submit">
</form>
</body>
</html>
OUTPUT:
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