有没有办法使用 PHP 从外部文档引用变量？

发布于 2024-08-19 04:19:14 字数 295 浏览 9 评论 0原文

我想使用 PHP 做一些小事情，但我需要知道如何从外部文档（例如 external.php）获取变量并在 PHP 文档（internal.php）的函数中使用它。我在想也许是这样的：

外部.php

$variable = "true";

代码内部.php 代码

if ($GETFROM{'/external.php'}['variable']) 
echo "It worked";

有没有可能的方法来做这样的事情？

原文

I wanted to use PHP do do a little thing, but I needed to know how to get a variable from an external document (say external.php) and use it in a function in a PHP document (internal.php).
I was thinking maybe something like this:

Code for external.php

$variable = "true";

Code for internal.php

if ($GETFROM{'/external.php'}['variable']) 
echo "It worked";

Is there any possible way to do something like this?

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溺孤伤于心 2024-08-26 04:19:14

为此使用 include 函数。在internal.php中

include 'external.php';
if($variable)
{
    echo "It worked";
}

注意：这对于配置文件或类或辅助函数的加载非常有用，但请尽量避免在源代码中的随机位置包含太多内容。这会使您的代码非常难以阅读。

Use the include function for that. In internal.php

include 'external.php';
if($variable)
{
    echo "It worked";
}

Note: This is great for configuration files or loading of classes or helper functions, but try to avoid too many includes in random places in your sourcecode. This can make your code very hard to read.

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怪我入戏太深 2024-08-26 04:19:14

如果您想将包含文件中的特定值直接包含到当前文档中的变量中，您还可以包含一个返回该值的 PHP 文件。

例如

inc.phpindex.php

<?php
    return "Hello, world!";
?>

：

<?php
    $var = include "inc.php";

    if(isset($var) && !empty($var)) {
        echo "It worked!\n";
        echo "Value: {$var}";
    }
    else {
        echo "It failed!";
    }
?>

If you want to include a specific value from an include file directly into a variable in your current document, you can also include a PHP file which returns the value.

For example:

inc.php

<?php
    return "Hello, world!";
?>

index.php

<?php
    $var = include "inc.php";

    if(isset($var) && !empty($var)) {
        echo "It worked!\n";
        echo "Value: {$var}";
    }
    else {
        echo "It failed!";
    }
?>

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