PHP表单验证内容是否为空的实现代码
2018-09-07 21:39
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：
<!doctype html> <html> <head> <meta http-equiv=conent-type content=text/html charset=utf-8/> <style> .red{ color:red; } </style> </head> <body> <?php function test_input($data){ $data=trim($data); $data=stripslashes($data); $data=htmlspecialchars($data); return $data; } ?> <?php $name=$email=$web=$comment=$gender=; $nameerr=$emailerr=$weberr=$commenterr=$gendererr=; if($_SERVER[REQUEST_METHOD]==POST){ if(empty($_POST[name])){ $nameerr=必填名字; }else{ $name=test_input($_POST[name]); } if(empty($_POST[email])){ $emailerr=必填邮件; }else{ $email=test_input($_POST[email]); } if(empty($_POST[web])){ $weberr=必填网址; }else{ $web=test_input($_POST[web]); } if(empty($_POST[comment])){ $commenterr=必填备注; }else{ $comment=test_input($_POST[comment]); } if(empty($_POST[gender])){ $gendererr=必填备注; }else{ $gender=test_input($_POST[gender]); } } ?> <h1>表单验证</h1> <span class=red>*必填字段</span> <form method=POST action=<?php echo htmlspecialchars($_SERVER[PHP_SELF]);?>> 名字：<input type=text name=name/><span class=red><?php echo *.$nameerr;?></span> <br/> E-mail：<input type=text name=email/><span class=red><?php echo *.$emailerr;?></span> <br/> 网址：<input type=text name=web/><span class=red><?php echo *.$weberr;?></span> <br/> 备注：<textarea rows=10 cols=40 name=comment></textarea><span class=red><?php echo *.$commenterr;?></span> <br/> 性别：<input type=radio name=gender value=男/>男<input type=radio name=gender value=女/>女<span class=red><?php echo *.$gendererr;?></span> <br/> <input type=submit value=提交验证/> </form> <?php echo 名字.$name; echo <br/>; echo E-mail：.$email; echo <br/>; echo 网址：.$web; echo <br/>; echo 备注：.$comment; echo <br/>; echo 性别：.$gender; echo <br/>; ?> </body> </html>
以上就是小编为大家带来的PHP表单验证内容是否为空的实现代码全部内容了，希望大家多多支持脚本之家~
上一篇：PHP目录操作实例总结