我现在正在学习PHP并处理表单。我有一项任务要创建一个表单，在同一页面上创建一个GET和一个POST，并将结果发布在每个表单下面的同一页面
我创建了一个if/else语句，但可能我做得不对。
<div>
<h1>POST Method Form</h1>
<form method="POST" action="<?php echo $_SERVER['PHP_SELF']; ?>" >
First Name:<br>
<input type="text" name="firstname"><br>
Last Name:<br>
<input type="text" name="lastname"><br>
E-mail: <input type="text" name="email"><br>
Database Utilized: <br>
<input type="checkbox" name="dba" value="SQL Server">SQL Server<br>
<input type="checkbox" name="dba" value="Oracle">Oracle<br>
<input type="checkbox" name="dba" value="Access">Microsoft Access<br>
<br>
<input type="submit" name="postsubmit" value="Submit">
</form>
<br>
<h1>Database Consulting POST Form Results</h1>
<p>
<?php
if (isset($_POST['postsubmit'])) {
$firstname = $_POST['firstname'];
$lastname = $_POST['laststname'];
$email = $_POST['email'];
$dba = $_POST['dba'];
echo $firstname; <br>
echo $lastname; <br>
echo $email; <br>
echo $dba; <br>
}
else {
echo "Please enter correct values in form and hit submit";
}
?>
</p>
<br>
<h1>GET Method Form</h1>
<form method="GET" action="<?php echo $_SERVER['PHP_SELF']; ?>" >
First name:<br>
<input type="text" name="firstname_get"><br>
Last name:<br>
<input type="text" name="lastname_get"><br>
E-mail: <input type="text" name="email_get"><br>
Database Utilized<br>
<input type="checkbox" name="dba_get" value="SQL Server">SQL Server<br>
<input type="checkbox" name="dba_get" value="Oracle">Oracle<br>
<input type="checkbox" name="dba_get" value="Access">Microsoft Access<br>
<br>
<input type="submit" name="getsubmit" value="Submit">
</form>
<br>
<br>
<h1>Database Consulting GET Form Results</h1>
<p>
<?php
if (isset($_GET['getsubmit'])) {
$firstname_get = $_GET['firstname'];
$lastname_get = $_GET['laststname'];
$email_get = $_GET['email'];
$dba_get = $_GET['dba'];
echo $firstname_get; <br>
echo $lastname_get; <br>
echo $email_get; <br>
echo $dba_get; <br>
}
else {
echo "Please enter correct values in form and hit submit";
}
?>
</p>
</div>
您将$_GET['lastname']拼错为$_GET['laststname']，将您的操作更改为action=""，并将您的<br>包含在回声语句中，如echo $firstname .'<br>';而不是echo $firstname; <br>
<h1>POST Method Form</h1>
<form method="POST" action="" >
First Name:<br>
<input type="text" name="firstname"><br>
Last Name:<br>
<input type="text" name="lastname"><br>
E-mail: <input type="text" name="email"><br>
Database Utilized: <br>
<input type="checkbox" name="dba[]" value="SQL Server">SQL Server<br>
<input type="checkbox" name="dba[]" value="Oracle">Oracle<br>
<input type="checkbox" name="dba[]" value="Access">Microsoft Access<br>
<br>
<input type="submit" name="postsubmit" value="Submit">
</form>
<br>
<h1>Database Consulting POST Form Results</h1>
<p>
<?php
if (isset($_POST['postsubmit'])) {
$firstname = $_POST['firstname'];
$lastname = $_POST['lastname'];
$email = $_POST['email'];
$dba = $_POST['dba'];
echo $firstname .'<br>';
echo $lastname .'<br>';
echo $email .'<br>';
foreach ($dba as $database) {
echo $database .'<br>';
}
}
else {
echo "Please enter correct values in form and hit submit";
}
?>
</p>
首先，我建议有一个名为action的隐藏字段，如：
<input type="hidden" name="action" value="submituserinfo" />
然后将php逻辑放在顶部而不是底部，在页面显示之前进行处理！你的PHP_SELF交易很好。但你的逻辑错了。正确的逻辑应该是：
if(isset($_REQUEST['action']) && $_REQUEST['action']=='submituserinfo'){
//analyze the data
if($errors){
//set a var to show errors below
}else{
//enter the data, whatever
}
}
这应该会让你朝着正确的方向开始。如果将编码放在文档的开头，则可以更好地处理输出，甚至可以根据成功或错误使用header（）进行重定向。