<!DOCTYPE HTML>
<html>
<head>
<title>form</title>
<style type="text/css">
.err{
color: red;
}
</style>
</head>
<body>
<?php
$name = $email = $website = $commet = $gender = $nameErr = $emailErr = $genderErr = '';
if($_SERVER['REQUEST_METHOD'] == "POST"){
if(empty($_POST['name'])){
$nameErr = "姓名为必填项";
}else{
$name = test_input($_POST['name']);
if(!preg_match("/^[a-zA-Z ]*$/" , $name)){
$nameErr = "姓名只允许字母和空格";
}
}
if(empty($_POST['email'])){
$emailErr = "邮件为必填项";
}else{
$email = test_input($_POST['email']);
if(!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/" , $email)){
$emailErr = "邮件格式不正确";
}
}
if(empty($_POST['gender'])){
$genderErr = "性别为必选项";
}else{
$gender = test_input($_POST['gender']);
}
$website = empty($_POST['website'])?'':test_input($_POST['website']);
$commet = empty($_POST['commet'])?'':test_input($_POST['commet']);
}
function test_input($str){
$str = trim($str);
$str = stripslashes($str);
$str = htmlspecialchars($str);
return $str;
}
?>
<form action="<?php echo htmlspecialchars($_SERVER['PHP_SELF']); ?>" method="post">
<p>姓名：<input type="text" name="name" value="<?php echo $name;?>"/><span class="err">* <?php echo $nameErr; ?> </span></p>
<p>邮件：<input type="text" name="email" value="<?php echo $email;?>" /><span class="err">* <?php echo $emailErr; ?></span></p>
<p>网址：<input type="text" name="website" value="<?php echo $website;?>"/></p>
<p>评论：<textarea name="commet" id="" cols="30" rows="10"><?php echo $commet;?></textarea></p>
<p>性别
<label><input type="radio" name="gender" value="female" <?php if(isset($gender) && $gender=="female") echo 'checked'; ?>/>女性</label>
<label><input type="radio" name="gender" value="male" <?php if(isset($gender) && $gender == 'male') echo 'checked'?>/>男性</label>
<span class="err">* <?php echo $genderErr; ?></span>
</p>
<button>提交</button>
</form>
<hr />
<?php echo $name;?>
<br />
<?php echo $email;?>
<br />
<?php echo $website;?>
<br />
<?php echo $commet;?>
<br />
<?php echo $gender;?>
</body>
</html>
<?php
?>