Check If a File Was Included or Loaded

Check if a file was included or loaded

Quoted from: How to know if php script is called via require_once()?

I was looking for a way to determine if a file have been included or called directly, all from within the file. At some point in my quest I passed through this thread. Checking various other threads on this and other sites and pages from the PHP manual I got enlightened and came up with this piece of code:

if (basename(__FILE__) == basename($_SERVER["SCRIPT_FILENAME"])) {
  echo "called directly";
} else {
  echo "included/required";
}

In essence it compares if the name of the current file (the one that
could be included) is the same as the file that is beeing executed.

Credit: @Interwebs Cowboy

PHP: Check if a file is loaded directly instead of including?

If you use

define('APP_RAN'); 

in the file that includes it and then put

if(!defined('APP_RAN')){ die(); }

or alternatively

defined('APP_RAN') or die();

(which is easier to read)

in included files it would die if you access them directly.

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It would probably be better to put all of your included files above your DocumentRoot though.

For example, if your index page is at

/my/server/domain/public_html

You should put the included files in

/my/server/domain/

Is there any way to know if the file was included or loaded directly?

There are many ways, bound to be a duplicate. One way if you're not using any URL rewriting, is to check the name of the file against the file that is called. Here's one way to do that:

if(basename(__FILE__) == basename($_SERVER['PHP_SELF'])) {
    //direct
} else {
    //included
}

1. __FILE__ returns the actual file path on disk of the file, such as /var/www/mysite/GetCategories.php
2. $_SERVER['PHP_SELF'] returns the current file loaded from the webserver, such as /includes/GetCategories.php or /index.php

If they are the same, then it was loaded directly. If they are not the same then the file from 2 above included the file from 1.

How to know if a JS file is loaded on server side?

Since the script is requested from your server every time a user loads a browser-page you can track who and how often that path is requested.

A simple approach is that it will be present in you request log files. So you can create a script and read your log files every so often.

A second approach is to setup a special rule/location in nginx/apache/which-ever-server-you-are-running

A third approach is to serve the script via CDN that has all these attributes built in (ie. CloudFront)

Check if a file exists before loading it

In order to see whether or not a file exists in internal local storage of the app use:

import 'dart:io' as io;
var syncPath = await path;

// for a file
await io.File(syncPath).exists();
io.File(syncPath).existsSync();

// for a directory
await io.Directory(syncPath).exists();
io.Directory(syncPath).existsSync();

Check if an include (or require) exists

I believe file_exists does work with relative paths, though you could also try something along these lines...

if(!@include("script.php")) throw new Exception("Failed to include 'script.php'");

... needless to say, you may substitute the exception for any error handling method of your choosing. The idea here is that the if-statement verifies whether the file could be included, and any error messages normally outputted by include is supressed by prefixing it with @.

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