內容為空效果圖為：
填寫內容效果圖：
下面是驗證程序的代碼：
<!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="必填郵件";
}else{
$email=test_input($_POST['email']);
}
if(empty($_POST['web'])){
$weberr="必填網址";
}else{
$web=test_input($_POST['web']);
}
if(empty($_POST['comment'])){
$commenterr="必填備注";
}else{
$comment=test_input($_POST['comment']);
}
if(empty($_POST['gender'])){
$gendererr="必填備注";
}else{
$gender=test_input($_POST['gender']);
}
}
?>
<h1>表單驗證</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 "*".$emailerr;?></span>
<br/>
網址：<input type="text" name="web"/><span class="red"><?php echo "*".$weberr;?></span>
<br/>
備注：<textarea rows="10" cols="40" name="comment"></textarea><span class="red"><?php echo "*".$commenterr;?></span>
<br/>
性別：<input type="radio" name="gender" value="男"/>男<input type="radio" name="gender" value="女"/>女<span class="red"><?php echo "*".$gendererr;?></span>
<br/>
<input type="submit" value="提交驗證"/>
</form>
<?php
echo "名字".$name;
echo "<br/>";
echo "E-mail：".$email;
echo "<br/>";
echo "網址：".$web;
echo "<br/>";
echo "備注：".$comment;
echo "<br/>";
echo "性別：".$gender;
echo "<br/>";
?>
</body>
</html>
以上就是小編為大家帶來的PHP表單驗證內容是否為空的實現代碼全部內容了，希望大家多多支持~
