php 使用 $_POST 获取同一页面上的输入值
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Use $_POST to get input values on the same page
提问by Piccolo
Sorry if this is a rather basic question.
对不起，如果这是一个相当基本的问题。
I have a page with an HTML form. The code looks like this:
我有一个带有 HTML 表单的页面。代码如下所示：
<form action="submit.php" method="post">
Example value: <input name="example" type="text" />
Example value 2: <input name="example2" type="text" />
<input type="submit" />
</form>
Then in my file submit.php, I have the following:
然后在我的文件中submit.php，我有以下内容：
<?php
$example = $_POST['example'];
$example2 = $_POST['example2'];
echo $example . " " . $example2;
?>
However, I want to eliminate the use of the external file. I want the $_POST variables on the same page. How would I do this?
但是，我想消除外部文件的使用。我想要在同一页面上的 $_POST 变量。我该怎么做？
回答by KaeruCT
Put this on a php file:
把它放在一个 php 文件中：
<?php
if (isset($_POST['submit'])) {
$example = $_POST['example'];
$example2 = $_POST['example2'];
echo $example . " " . $example2;
}
?>
<form action="" method="post">
Example value: <input name="example" type="text" />
Example value 2: <input name="example2" type="text" />
<input name="submit" type="submit" />
</form>
It will execute the whole file as PHP. The first time you open it, $_POST['submit']won't be set because the form has not been sent.
Once you click on the submit button, it will print the information.
它会将整个文件作为 PHP 执行。第一次打开时，$_POST['submit']不会设置，因为表单尚未发送。单击提交按钮后，它将打印信息。
