PHP表单验证内容是否为空

内容为空效果图为：

填写内容效果图：

下面是验证程序的代码：

 1 <!doctype html>
 2 <html>
 3 <head>
 4 <meta http-equiv="conent-type" content="text/html" charset="utf-8"/>
 5 <style>
 6 .red{
 7 color:red;
 8 }
 9 </style>
10 </head>
11 <body>
12 <?php
13 function test_input($data){
14     $data=trim($data);
15     $data=stripslashes($data);
16     $data=htmlspecialchars($data);
17     return $data;
18 }
19 ?>
20 <?php
21 $name=$email=$web=$comment=$gender="";
22 $nameerr=$emailerr=$weberr=$commenterr=$gendererr="";
23 if($_SERVER['REQUEST_METHOD']=="POST"){
24     if(empty($_POST['name'])){
25         $nameerr="必填名字";
26     }else{
27         $name=test_input($_POST['name']);
28     }
29     if(empty($_POST['email'])){
30         $emailerr="必填邮件";
31     }else{
32         $email=test_input($_POST['email']);
33     }
34     if(empty($_POST['web'])){
35         $weberr="必填网址";
36     }else{
37         $web=test_input($_POST['web']);
38     }
39     if(empty($_POST['comment'])){
40         $commenterr="必填备注";
41     }else{
42         $comment=test_input($_POST['comment']);
43     }
44     if(empty($_POST['gender'])){
45         $gendererr="必填备注";
46     }else{
47         $gender=test_input($_POST['gender']);
48     }
49 }
50 ?>
51 <h1>表单验证</h1>
52 <span class="red">*必填字段</span>
53 <form method="POST" action="<?php echo htmlspecialchars($_SERVER['PHP_SELF']);?>">
54 名字：<input type="text" name="name"/><span class="red"><?php echo "*".$nameerr;?></span>
55 <br/>
56 E-mail：<input type="text" name="email"/><span class="red"><?php echo "*".$emailerr;?></span>
57 <br/>
58 网址：<input type="text" name="web"/><span class="red"><?php echo "*".$weberr;?></span>
59 <br/>
60 备注：<textarea rows="10" cols="40" name="comment"></textarea><span class="red"><?php echo "*".$commenterr;?></span>
61 <br/>
62 性别：<input type="radio" name="gender" value="男"/>男<input type="radio" name="gender" value="女"/>女<span class="red"><?php echo "*".$gendererr;?></span>
63 <br/>
64 <input type="submit" value="提交验证"/>
65 </form>
66 <?php
67 echo "名字".$name;
68 echo "<br/>";
69 echo "E-mail：".$email;
70 echo "<br/>";
71 echo "网址：".$web;
72 echo "<br/>";
73 echo "备注：".$comment;
74 echo "<br/>";
75 echo "性别：".$gender;
76 echo "<br/>";
77 ?>
78 </body>
79 </html>
表单验证程序

 

posted @ 2016-08-17 14:04  超级怪蜀黍  阅读(1169)  评论(0)  编辑  收藏  举报