How to Define and Use Global Constants in Laravel 5.1 on Linux

Note: This guide assumes Laravel version 5.1.

Method 1 (works locally, may fail on server)

Create a constants.php file in the config directory with the following content:

<code>&lt;?php
return [
    'URI' => 'baidu.com',
];
</code>

Access the constant using:

<code>echo Config::get('constants.URI');</code>

Method 2 (requires file permission change)

Add a require statement at the end of bootstrap/autoload.php :

<code>require __DIR__.'/constants.php';</code>

Create constants.php under the bootstrap directory with:

<code>&lt;?php
define('URI', 'xxx.com.cn');
</code>

Use the constant with:

<code>echo URI;</code>

On Linux servers, ensure the constants.php file has permission 755 for it to work.