通过 HTML 表单传递 PHP 变量值
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Pass a PHP variable value through an HTML form
提问by user2642907
In a html form I have a variable $var = "some value";.
在 html 表单中，我有一个变量$var = "some value";。
I want to call this variable after the form posted. The form is posted on the same page.
我想在表单发布后调用这个变量。该表格张贴在同一页面上。
I want to call here
我想在这里打电话
if (isset($_POST['save_exit']))
{
echo $var;
}
But the variable is not printing. Where I have to use the code GLOBAL ??
但是变量没有打印。我必须在哪里使用代码 GLOBAL ??
回答by Charaf JRA
EDIT:After your comments, I understand that you want to pass variable through your form.
编辑：在您发表评论后，我知道您想通过表单传递变量。
You can do this using hidden field:
您可以使用隐藏字段执行此操作：
<input type='hidden' name='var' value='<?php echo "$var";?>'/>
In PHP action File:
在 PHP 操作文件中：
<?php
if(isset($_POST['var'])) $var=$_POST['var'];
?>
Or using sessions: In your first page:
或使用会话：在您的第一页中：
$_SESSION['var']=$var;
start_session();should be placed at the beginning of your php page.
start_session();应该放在你的php页面的开头。
In PHP action File:
在 PHP 操作文件中：
if(isset($_SESSION['var'])) $var=$_SESSION['var'];
First Answer:
第一个答案：
You can also use $GLOBALS:
您还可以使用$GLOBALS：
if (isset($_POST['save_exit']))
{
echo $GLOBALS['var'];
}
Check this documentationfor more informations.
查看此文档以获取更多信息。
回答by Alex Rashkov
Try that
试试看
First place
第一名
global $var;
$var = 'value';
Second place
第二个地方
global $var;
if (isset($_POST['save_exit']))
{
echo $var;
}
Or if you want to be more explicit you can use the globals array:
或者，如果您想更明确，您可以使用 globals 数组：
$GLOBALS['var'] = 'test';
// after that
echo $GLOBALS['var'];
And here is third options which has nothing to do with PHP global that is due to the lack of clarity and information in the question. So if you have form in HTML and you want to pass "variable"/value to another PHP script you have to do the following:
这是第三个选项，与 PHP global 无关，这是由于问题中缺乏清晰度和信息。因此，如果您有 HTML 格式的表单，并且想将“变量”/值传递给另一个 PHP 脚本，则必须执行以下操作：
HTML form
HTML 表单
<form action="script.php" method="post">
<input type="text" value="<?php echo $var?>" name="var" />
<input type="submit" value="Send" />
</form>
PHP script ("script.php")
PHP 脚本（“script.php”）
<?php
$var = $_POST['var'];
echo $var;
?>
