PHP表单验证内容是否为空的实现代码
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2024-03-04 11:48:17
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:
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>
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