您的位置：首页 > 编程语言 > PHP开发

PHP表单验证

2015-07-15 11:38 633 查看 
<!DOCTYPE html>
<html>
<head>
<title>Test Code</title>
</head>
<body>
<h1>
My PHP Test
<h1>
<?php
echo "<h1><span style=\"color:#ff0000;\">2015/7/15 上午</span></h1>";
echo "A Simple Form-data<br>";
#<a href="/demo/test_get.php?subject=PHP&web=W3school.com.cn">测试 $GET</a>
?>
<!--一个简单的HTML表单-->
<form action="<?php echo $_SERVER['PHP_SELF']?>"  method="post">
Name:
<input type="text" name="name">
<br>
E-mail:
<input type="text" name="email">
<br>
<input type="submit">
</form>
<?php
$name=$_REQUEST['name'];
echo $name;
?>
<?php
$nameErr = $emailErr = $genderErr = $websiteErr="";
$name=$email=$gender=$comment=$website="";
// 定义变量并设置为空值

if ($_SERVER["REQUEST_METHOD"] == "POST") {
if (empty($_POST["name"])) {
$nameErr = "姓名是必填的";
} else {
$name = test_input($_POST["name"]);
if(!preg_match("/^[a-zA-Z]*$/",$name)){
$nameErr="只允许字母和空格";
}
}

if (empty($_POST["email"])) {
$emailErr = "电邮是必填的";
} else {
$email = test_input($_POST["email"]);
//if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email))
if(!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email)){
$emailErr="无效的 Email 格式 ！";
}
}

if (empty($_POST["website"])) {
$website = "";
} else {
$website = test_input($_POST["website"]);
if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$website)) {
$websiteErr = "无效的 URL ！";
}
}

if (empty($_POST["comment"])) {
$comment = "";
} else {
$comment = test_input($_POST["comment"]);
}

if (empty($_POST["gender"])) {
$genderErr = "性别是必选的";
} else {
$gender = test_input($_POST["gender"]);
}
}

function test_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
<h2>表单验证实例</h2>
<span style="color:#FF0000;">*必填字段</span>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP-SELF"]);?>">
<p> 姓名 :
<input type="text" name="name" value="<?php echo $name;?>">
<span style="color:#FF0000"> * <?php echo $nameErr;?></span>
<p> 电邮 :
<input type="text" name="email" value="<?php echo $email;?>">
<span style="color:#FF0000"> * <?php echo $emailErr;?></span>
<p> 网址 :
<input type="text" name="website" value="<?php echo $website;?>">
<span style="color:#FF0000"> * <?php echo $websiteErr;?></span>
<p> 评论 ：
<textarea name="comment" rows="5" cols="40"><?php echo $comment;?></textarea>
<p> 性别 :
<input type="radio" name = "gender"
<?php if(isset($gender)&&$gender=="female") echo "Checked";?>
value="female">女性
<input type="radio" name = "gender"
<?php if(isset($gender)&&$gender=="male") echo "Checked";?>
value="male">男性
<span style="color:#FF0000"> *</span>
<p>
<input type="submit" name="submit" value="提交">
</form>
<?php
echo "<h2>您的输入：</h2>";
echo $name;
echo "<br>";
echo $email;
echo "<br>";
echo $website;
echo "<br>";
echo $comment;
echo "<br>";
echo $gender;
?>
<!--
（通过PHPtrim()函数）去除用户输入数据中不必要的字符（多余的空格、制表符、换行）
（通过 PHP stripslashes() 函数）删除用户输入数据中的反斜杠（\）
-->

</body>
</html>
内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理 点击这里给我发消息
标签： 
相关文章推荐
新的分享
章节导航