README

Environment variable loader and retriever for PHP.
Sanitization/Filters can be applied on retrieval if filter extension is loaded.
Using env to configure application is one of the 12 postulates.

Installation

composer require adhocore/env

Usage

Loading

use Ahc\Env\Loader;

// Load env variables from .env file to `putenv` by default:
(new Loader)->load('/project/root/.env');

// Pass in boolean second param to control if the env should be reloaded:
(new Loader)->load('/project/root/.env', true);

// Load to $_SERVER global:
(new Loader)->load('/project/root/.env', true, Loader::SERVER);

// Load to $_ENV global and putenv():
(new Loader)->load('/project/root/.env', true, Loader::ENV | Loader::PUTENV);

// Load to all targets:
(new Loader)->load('/project/root/.env', true, Loader::ALL);

Always wrap complex values within double quotes in .env file. Eg: APP_KEY="K&^¢*&D(?<µ}^(P\]X"

ENV Format

Supports # or ; comments. Literal double quote should be escaped like "". See more examples below:

# comment line
a=1
b="2"
c=$3#
; also comment line
d="lol"
# empty
e=
# f is `"6"`
f=""6""
1_2=one_two
# empty too
E=""
A_B=Apple Ball
x=Y

Reference is possible like so:

MAIN=1
REF=${MAIN}/2
REF2=${REF}/3
# below will not be parsed as INV is not resolved
REF3=${INV}

Retrieving

use Ahc\Env\Retriever;

// Retrieve:
echo Retriever::getEnv($key);

// Default value:
echo Retriever::getEnv('PAYMENT_GATEWAY', 'stripe');

// Sanitization (pass third and optionally fourth parameters):
echo Retriever::getEnv('MYSQL_PORT', 3306, FILTER_VALIDATE_INT);

// Or you can use `env()` which is alias of `Retriever::getEnv()`:
echo env('THE_KEY');

See filter_var for more on sanitizing/filtering values!

Benchmark

If you are interested here is a simple benchmark.

Consideration

By default this library only loads env to putenv(). Be cautious exposing confidential credentials into $_ENV and $_SERVER which bug/error catchers may log.

Although this libray is already fast enough, in production you might want to boost performance a little by loading if only required:

if (!getenv('<LAST_ENV_APP_SHOULD_BE_AWARE_OF>')) {
    // Override false :)
    (new Loader)->load('/project/root/.env', false);
}

For example if your app last introduced FB_APP_ID env, but this value is not already hard set in the machine, it would be loaded via .env file else you are already covered.

Credits

This project is release managed by please.

adhocore / env

Maintainers

Details