新手教程在线编辑器

demo_form_validation_escapechar.php:

<!DOCTYPE HTML>  
<html>
<head>
</head>
<body>

<?php
// 定义变量并设置为空值
$name = $email = $gender = $comment = $website = "";

if ($_SERVER["REQUEST_METHOD"] == "POST") {
  $name = test_input($_POST["name"]);
  $email = test_input($_POST["email"]);
  $website = test_input($_POST["website"]);
  $comment = test_input($_POST["comment"]);
  $gender = test_input($_POST["gender"]);
}

function test_input($data) {
  $data = trim($data);
  $data = stripslashes($data);
  $data = htmlspecialchars($data);
  return $data;
}
?>

<h2>PHP 表单验证示例</h2>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">  
  姓名: <input type="text" name="name">
  <br><br>
  E-mail: <input type="text" name="email">
  <br><br>
  网址: <input type="text" name="website">
  <br><br>
  评论: <textarea name="comment" rows="5" cols="40"></textarea>
  <br><br>
  性别:
  <input type="radio" name="gender" value="female">女
  <input type="radio" name="gender" value="male">男
  <input type="radio" name="gender" value="other">其他
  <br><br>
  <input type="submit" name="submit" value="提交">  
</form>

<?php
echo "<h2>以下是你输出的内容:</h2>";
echo $name;
echo "<br>";
echo $email;
echo "<br>";
echo $website;
echo "<br>";
echo $comment;
echo "<br>";
echo $gender;
?>

</body>
</html>