davidlienhard/config

🐘 php library to get configuration data from json files

davidlienhard/config

🐘 php library to get configuration data from json/yaml files

Setup

You can install through composer with:

composer require davidlienhard/config:^2

Note: davidlienhard/config requires PHP 8.0

Examples

Setup

<?php declare(strict_types=1);
use DavidLienhard\Config\Config;

try {
    $config = new Config("path/to/config");
} catch (\Throwable $t) {
    echo "unable to setup config";
    exit(1);
}

Read Data

Example Config File: system.json

{
    "name": "test",
    "list1": {
        "key1": "value1",
        "key2": "value2",
        "key3": "value3",
        "key4": "value4"
    },
    "list2": [
        "value1",
        "value2",
        "value3",
        "value4"
    ]
}

get single value

<?php declare(strict_types=1);

echo $config->get("system", "name");
/* test */

echo $config->get("system", "list1", "key1");
/* value1 */

get single value with a specific type

<?php declare(strict_types=1);

echo $config->getAsString("system", "name");
/*
 if the value exists and is not an array, it will return a string in any case
 if the value is an array, this will throw an exception
 if the value does not exist this will return null
*/

the following methods do exists

• getAsString()
• getAsInt()
• getAsFloat()
• getAsBool()
• getAsArray()

get associative array

<?php declare(strict_types=1);

print_r($config->get("system", "list1"));
/*
    Array
    (
        [key1] => value1
        [key2] => value2
        [key3] => value3
        [key4] => value4
    )
*/

get numeric array

<?php declare(strict_types=1);

print_r($config->get("system", "list2"));
/*
    Array
    (
        [0] => value1
        [1] => value2
        [2] => value3
        [3] => value4
    )
*/

get not existing value

<?php declare(strict_types=1);

var_dump($config->get("system", "doesnotexist"));
/* NULL */

get data from not existing file

<?php declare(strict_types=1);

var_dump($config->get("doesnotexist"));
/* throws \Exception */

Parsers / Supported Filetypes

By default, this library contains two parsers. One for Json & one for Yaml/Yml files. If required it is possible to add a customer parser for othe filetypes, i.e. XML or INI. The custom parser must extend the class ParserAbstract and implement the Interface ParserInterface. A parser can be registered as follows:

<?php declare(strict_types=1);

try {
    $config->registerParser(\your\custom\parser::class);
} catch (ConfigException $e) {
    die("unable to register custom parser");
}

Exceptions

The library currently contains the following exceptions

• Config - Main Exception that is parent of all other exceptions
  • Conversion - Errors that happen during type conversion. eg trying to convert a string to an array
  • Mismatch - Trying to access configuration data that is not available
    • FileMismatch - Trying to access a file that does not exist
      • Parser - errors that happen when parsing files. usually through invalid files
    • KeyMismatch - Trying to access a key that does not exists, while the file is present

License

The MIT License (MIT). Please see LICENSE for more information.