oct sub radio strip mon sla size site
- <!DOCTYPE html><html>
- <head>
- <style>.error{color: #FF0000;
- }
- </style>
- </head>
- <body><?php
- // 定义变量并设置为空值
- $nameErr = $emailErr = $genderErr = $websiteErr = null;$name = $email = $gender = $comment = $website = null;if($_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><?php
- echo "<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>
- </html>
表单验证实例
来源: http://www.bubuko.com/infodetail-2103278.html