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<!DOCTYPE HTML>
<html>
<head>
<style>
.error {color: #FF0000;}
</style>
</head>
<body>
<?php
function test_input($data) {
$data = trim($data);
#$data = stripslashes($data); // Do not do this if you do not addslashes() before sending.
$data = htmlspecialchars($data);
return $data;
}
$error = NULL;
// define variables and set to empty values
$nameErr = $emailErr = $genderErr = $websiteErr = "";
$name = $email = $gender = $comment = $website = "";
if ($_SERVER["REQUEST_METHOD"] == "GET") {
$error = false;
if (empty($_GET["name"])) {
$nameErr = "Name is required";
$error = true;
} else {
$name = test_input($_GET["name"]);
}
if (empty($_GET["email"])) {
$emailErr = "Email is required";
$error = true;
} else {
$email = test_input($_GET["email"]);
}
if (empty($_GET["website"])) {
$website = "";
} else {
$website = test_input($_GET["website"]);
}
if (empty($_GET["comment"])) {
$comment = "";
} else {
$comment = test_input($_GET["comment"]);
}
if (empty($_GET["gender"])) {
$genderErr = "Gender is required";
$error = true;
} else {
$gender = test_input($_GET["gender"]);
}
}
if ($error === false) {
echo "<h2>Your Input:</h2>";
echo $name;
echo "<br>";
echo $email;
echo "<br>";
echo $website;
echo "<br>";
echo $comment;
echo "<br>";
echo $gender;
} else {
?>
<form method="GET" action="<?=htmlspecialchars($_SERVER["PHP_SELF"])?>">
Name: <input type="text" name="name" value="<?php echo $name;?>">
<span class="error">* <?php echo $nameErr;?></span>
<br><br>
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>
Comment: <textarea name="comment" rows="5" cols="40"><?php echo $comment;?></textarea>
<br><br>
Gender:
<input type="radio" name="gender" value="female"<?php if ($gender=="female") echo " checked";?>>Female
<input type="radio" name="gender" value="male"<?php if ($gender=="male") echo " checked";?>>Male
<input type="radio" name="gender" value="other"<?php if ($gender=="other") echo " checked";?>>Other
<span class="error">* <?php echo $genderErr;?></span>
<br><br>
<input type="submit" name="submit" value="Submit">
</form>
<?php
}
?>
</body>
</html>