案例：PHP案例     状态：不可编辑再运行    进入竖版
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​x
 
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​
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<!DOCTYPE HTML>
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<html>
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<head>
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</head>
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<body>
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​
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<?php
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// define variables and set to empty values
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$name = $email = $gender = $comment = $website = "";
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​
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if ($_SERVER["REQUEST_METHOD"] == "POST") {
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   $name = test_input($_POST["name"]);
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   $email = test_input($_POST["email"]);
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   $website = test_input($_POST["website"]);
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   $comment = test_input($_POST["comment"]);
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   $gender = test_input($_POST["gender"]);
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}
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​
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function test_input($data) {
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   $data = trim($data);
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   $data = stripslashes($data);
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   $data = htmlspecialchars($data);
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   return $data;
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}
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?>
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​
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<h2>PHP 验证实例</h2>
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<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
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   姓名：<input type="text" name="name">
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   <br><br>
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   电邮：<input type="text" name="email">
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   <br><br>
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   网址：<input type="text" name="website">
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   <br><br>
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   评论：<textarea name="comment" rows="5" cols="40"></textarea>
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   <br><br>
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   性别：
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   <input type="radio" name="gender" value="female">女性
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   <input type="radio" name="gender" value="male">男性
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   <br><br>
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   <input type="submit" name="submit" value="提交">
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</form>
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​
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<?php
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echo "<h2>您的输入：</h2>";
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echo $name;
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echo "<br>";