php中必须表单

来源：互联网发布：田岛绣花软件9.0 编辑：程序博客网时间：2024/05/18 00:38

<html>
<head>
<title></title>
<meta charset="utf-8">
<style>
.error
{
color:red;
}

</style>
</head>
<body>
<?php
//首先是获取表单中的值，怎样来获取
$nameErr=$emailErr=$webErr="";
$email=$name=$website="";
//$_POST["fname"]是从name=“fname”的表单中获取数据
if($_SERVER["REQUEST_METHOD"]=="POST")//第一步是确定form是哪一个是利用提交方式进行确定的
{
if(empty($_POST["fname"]))
{
//显然可以知道是empty是一个函数，使用来判断一个表单内是不是填为空
$nameErr="Name is Required";
}
else
{
$name=$_POST["fname"];
}
if(empty($_POST['email']))
{
$emailErr="Email is Require";
}
else
{
$email=$_POST['email'];
}
if(empty($_POST['web']))
{
$webErr='Website is require';
}
else
{
$website=$_POST['web'];
}
}
?>
<h3>PHP表单验证实例</h3>
<p>*必填字段*</p>
<form method="post" action="<?php echo htmlspecialchars($_SERVER['PHP_SELF']);?>">
Name:<input type="text" name="fname"><span class="error">
<?php echo $nameErr;?>
</span>
<br/>
E-mail:<input type="text" name="email">
<span class='error'><?php echo $emailErr;?></span>
<br/>
Website:<input type="text" name="web">
<br/>
<label>comment:</label><textarea name="comment" rows="5" cols="40"></textarea>
<br>
Gender:<input type="radio" name="gender" value="female">Female
<input type="radio" name="gender" value="male">Male
<br/>
<input type="submit" name="submit" value="Submit">
</form>
</body>
</html>

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