源代碼:

<?php
// 定義變量并默認設(shè)置為空值
$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 表單驗證實例</h2>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>"> 
   名字: <input type="text" name="name">

E-mail: <input type="text" name="email">

網(wǎng)址: <input type="text" name="website">

備注: <textarea name="comment" rows="5" cols="40"></textarea>

性別:
   <input type="radio" name="gender" value="female">女
   <input type="radio" name="gender" value="male">男

<?php
echo "<h2>您輸入的內(nèi)容是:</h2>";
echo $name;
echo "
";
echo $email;
echo "
";
echo $website;
echo "
";
echo $comment;
echo "
";
echo $gender;
?>

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源代碼:

運行結(jié)果：