Code:
<html> <head> <style>
.error {color: #FF0000;}
</style> </head> <body> <?php
$nameErr = $emailErr = $genderErr = $websiteErr = $nokpErr = "";
$name = $email = $gender = $nokp = $website = "";
if ($_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["email"])) {
$emailErr = "Email is required";
} else {
$email = test_input($_POST["email"]);
// check if e-mail address is well-formed
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
$emailErr = "Invalid email format";
}
}
if (empty($_POST["website"])) {
$website = "";
} else {
$website = test_input($_POST["website"]);
if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$website)) {
$websiteErr = "Invalid URL";
}
}
if (empty($_POST["nokp"])) {
$nokpErr = "";
} else {
$nokp = test_input($_POST["nokp"]);
if (!preg_match("/^[1-9][0-9]{0-17}$/",$nokp)) {
$nokpErr = "Only number is allowed";
}}
if (empty($_POST["gender"])) {
$genderErr = "Gender is required";
} else {
$gender = test_input($_POST["gender"]);
}
}
function test_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?> <h2>PHP Form</h2> <p><span class="error">* required field.</span></p> <form method="post" action="https://bytes.com/<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>"> <p>Name:
<input type="text" name="name" value="<?php echo $name;?>"> <span class="error">* <?php echo $nameErr;?></span> </p> <p>No KP:
<input name="nokp" type="text" id="nokp" value="<?php echo $nokp;?>" size="12"> <span class="error">* <?php echo $nokpErr;?></span></p> <p>
E-mail: <input type="text" name="email" value="<?php echo $email;?>"> <span class="error">* <?php echo $emailErr;?></span> <br><br>
Website: <input type="text" name="website" value="<?php echo $website;?>"> <span class="error"><?php echo $websiteErr;?></span><br><br>
Gender:
<input type="radio" name="gender" <?php if (isset($gender) && $gender=="female") echo "checked";?> value="male">Male
<input type="radio" name="gender" <?php if (isset($gender) && $gender=="male") echo "checked";?> value="female">Female
<span class="error">* <?php echo $genderErr;?></span> <br><br> <button type="submit" value="Submit">Submit</button> <button type="reset" value="Reset">Reset</button> </p> </form> <?php
echo "<h2>Your Input:</h2>";
echo $name;
echo "<br>";
echo $nokp;
echo "<br>";
echo $email;
echo "<br>";
echo $website;
echo "<br>";
echo $gender;
?> </body> </html>
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