PHP 表单（2）-表单完成

来源：互联网发布：青天白日t恤淘宝编辑：程序博客网时间：2024/06/05 16:29

>PHP验证名字

$name = test_input($_POST["name"]);if (!preg_match("/^[a-zA-Z ]*$/",$name)) {  $nameErr = "只允许字母和空格！"; }

preg_match()检索匹配，正则表达式（有待详解）

>PHP验证E-mail

$email = test_input($_POST["email"]);if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email)) {  $emailErr = "无效的 email 格式！"; }

>验证URL

$website = test_input($_POST["website"]);if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$website)) {  $websiteErr = "无效的 URL"; }

>实例执行

<body> <?php// 定义变量并设置为空值$nameErr = $emailErr = $genderErr = $websiteErr = "";$name = $email = $gender = $comment = $website = "";if ($_SERVER["REQUEST_METHOD"] == "POST") {   if (empty($_POST["name"])) {     $nameErr = "姓名是必填的";   } else {     $name = test_input($_POST["name"]);     // 检查姓名是否包含字母和空白字符     if (!preg_match("/^[a-zA-Z ]*$/",$name)) {       $nameErr = "只允许字母和空格";      }   }      if (empty($_POST["email"])) {     $emailErr = "电邮是必填的";   } else {     $email = test_input($_POST["email"]);     // 检查电子邮件地址语法是否有效     if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email)) {       $emailErr = "无效的 email 格式";      }   }        if (empty($_POST["website"])) {     $website = "";   } else {     $website = test_input($_POST["website"]);     // 检查 URL 地址语法是否有效（正则表达式也允许 URL 中的斜杠）     if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$website)) {       $websiteErr = "无效的 URL";      }   }   if (empty($_POST["comment"])) {     $comment = "";   } else {     $comment = test_input($_POST["comment"]);   }   if (empty($_POST["gender"])) {     $genderErr = "性别是必选的";   } else {     $gender = test_input($_POST["gender"]);   }}function test_input($data) {   $data = trim($data);   $data = stripslashes($data);   $data = htmlspecialchars($data);   return $data;}?><h2>PHP 验证实例</h2><p><span class="error">* 必需的字段</span></p><form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">    姓名：<input type="text" name="name">   <span class="error">* <?php echo $nameErr;?></span>   <br><br>   电邮：<input type="text" name="email">   <span class="error">* <?php echo $emailErr;?></span>   <br><br>   网址：<input type="text" name="website">   <span class="error"><?php echo $websiteErr;?></span>   <br><br>   评论：<textarea name="comment" rows="5" cols="40"></textarea>   <br><br>   性别：   <input type="radio" name="gender" value="female">女性   <input type="radio" name="gender" value="male">男性   <span class="error">* <?php echo $genderErr;?></span>   <br><br>   <input type="submit" name="submit" value="提交"> </form><?phpecho "<h2>您的输入：</h2>";echo $name;echo "<br>";echo $email;echo "<br>";echo $website;echo "<br>";echo $comment;echo "<br>";echo $gender;?></body>

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**PHP** 表单（2）-表单完成

PHP 表单（2）-表单完成