PHP library for simple configuration management -- Created by Chris Kankiewicz (@PHLAK)

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Introduction

Config is a simple PHP configuration management library supporting multiple configuration file formats and an expressive API.

Supported file formats:

• PHP
• INI
• JSON
• TOML
• YAML
• XML

Requirements

• PHP >= 7.1

Install with Composer

composer require phlak/config

Initializing the Client

First, import Config:

use PHLAK\Config\Config;

Then instantiate the class:

$config = new Config($context, $prefix = null);

Where $context is one of the following:

• A path to a supported file type
• A directory path containing one or more supported file types
• An array of configuration options

And $prefix is a string to be used as a key prefix for options of this Config object.

Configuration File Formats

PHP

A PHP configuration file must have the .php file extension, be a valid PHP file and and return a valid PHP array.

Example PHP file

<?php

return [
    'driver' => 'mysql',
    'drivers' => [
        'sqlite' => [
            'database' => 'database.sqlite',
            'prefix' => ''
        ],
        'mysql' => [
            'host' => 'localhost',
            'database' => 'blog',
            'username' => 'blogger',
            'password' => 'hunter2',
            'charset' => 'utf8',
            'prefix' => ''
        ]
    ]
];

INI

An INI configuration file must have the .ini file extension and be a valid INI file.

Example INI file

driver = mysql

[drivers]

sqlite[database] =  database.sqlite
sqlite[prefix] =

mysql[host] = localhost
mysql[database] = blog
mysql[username] = blogger
mysql[password] = hunter2
mysql[charset] = utf8
mysql[prefix] =

JSON

A JSON configuration file must have the .json file extension and contain a valid JSON object.

Example JSON file

{
    "driver": "mysql",
    "drivers": {
        "sqlite": {
            "database": "database.sqlite",
            "prefix": ""
        },
        "mysql": {
            "host": "localhost",
            "database": "blog",
            "username": "blogger",
            "password": "hunter2",
            "charset": "utf8",
            "prefix": ""
        }
    }
}

TOML

A TOML configuration file must have the .toml file extension and be a valid TOML file.

Example TOML file

driver = 'mysql'

[drivers.sqlite]
database = 'database.sqlite'
prefix = ''

[drivers.mysql]
host = 'localhost'
database = 'blog'
username = 'blogger'
password = 'hunter2'
charset = 'utf8'
prefix = ''

YAML

A YAML configuration file must have the .yaml file extension, be a valid YAML file.

Example YAML file

driver: mysql

drivers:

  sqlite:
    database: database.sqlite
    prefix:

  mysql:
    host: localhost
    database: blog
    username: blogger
    password: hunter2
    charset: utf8
    prefix:

XML

A XML configuration file must have the .xml file extension and contain valid XML.

Example XML file

<?xml version='1.0'?>

<database>
    <driver>mysql</driver>
    <drivers>
        <sqlite>
            <database>database.sqlite</database>
            <prefix></prefix>
        </sqlite>
        <mysql>
            <host>localhost</host>
            <database>blog</database>
            <username>blogger</username>
            <password>hunter2</password>
            <charset>utf8</charset>
            <prefix></prefix>
        </mysql>
    </drivers>
</database>

Usage

__construct

Create a new Config object.

Config::__construct( mixed $context [, string $prefix = null ] ) : Config

$context

Raw array of configuration options or path to a configuration file or directory containing one or more configuration files

$prefix

A key under which the loaded config will be nested

Examples

Create a new Config object from a YAML file.

$config = new Config('path/to/conifg.yaml');

Create a new Config object from a directory of config files.

$config = new Config('path/to/conifgs/');

Create a new Config object from an array.

$config = new Config([
    'hostname' => 'localhost',
    'port' => 12345
]);

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set

Store a config value with a specified key.

Config::set( string $key, mixed $value ) : bool

$key

Unique configuration option key

$value

Config item value

Example

$config->set('hostname', 'localhost');
$config->set('port', 12345);

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get

Retrieve a configuration option via a provided key.

Config::get( string $key [, mixed $default = null ] ) : mixed

$key

Unique configuration option key

$value

Config item value

Examples

// Return the hostname option value or null if not found.
$config->get('hostname');

Define a default value to return if the option is not set.

// Returns 'localhost' if hostname option is not set
$config->get('hostname', 'localhost');

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has

Check for the existence of a configuration item.

Config::has( string $key ) : bool

$key

Unique configuration option key

Example

$config = new Config([
    'hostname' => 'localhost'
]);

$config->has('hostname'); // Returns true
$config->has('port');     // Returns false

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append

Append a value onto an existing array configuration option.

Config::append( string $key, mixed $value ) : bool

$key

Unique configuration option key

$value

Config item value

Example

Append baz to the tags config item array.

$config->set('tags', ['foo', 'bar'])
$config->append('tags', 'baz'); // ['foo', 'bar', 'baz']

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prepend

Prepend a value onto an existing array configuration option.

Config::append( string $key, mixed $value ) : bool

$key

Unique configuration option key

$value

Config item value

Example

Prepend baz to the tags config item array.

$config->set('tags', ['foo', 'bar'])
$config->append('tags', 'baz'); // ['baz', 'foo', 'bar']

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unset

Unset a configuration option via a provided key.

Config::unset( string $key ) : bool

$key

Unique configuration option key

Example

$config->unset('hostname');

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load

Load configuration options from a file or directory.

Config::load( string $path [, string $prefix = null [, bool $override = true ]] ) : self

$path

Path to configuration file or directory

$prefix

A key under which the loaded config will be nested

$override

Whether or not to override existing options with values from the loaded file

Examples

Load a single additional file.

$conifg->load('path/to/config.php');

Load an additional file with a prefix.

$config->load('databaes.php', 'database');

Load an additional file without overriding existing values.

$config->load('additional-options.php', null, false);

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merge

Merge another Config object into this one.

Config::merge( Config $config [, bool $override = true ] ) : self

$config

Instance of Config

$override

Whether or not to override existing options with values from the merged config object

Examples

Merge $anotherConfig into $config and override values in $config with values from $anotherConfig.

$anotherConfig = new Config('some/config.php');

$config->merge($anotherConfig);

Merge $anotherConfig into $config without overriding any values. Duplicate values in $anotherConfig will be lost.

$anotherConfig = new Config('some/config.php');

$config->merge($anotherConfig, false);

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split

Split a sub-array of configuration options into it's own Config object.

Config::split( string $key ) : Config

$key

Unique configuration option key

Example

$config = new Config([
    'foo' => 'foo',
    'bar' => [
        'baz' => 'barbaz'
    ],
]);

$barConfig = $config->split('bar');

$barConfig->get('baz');  // Returns 'barbaz'

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toArray

Return the entire configuration as an array.

Config::toArray( void ) : array

Example

$config = new Config(['foo' => 'foo']);

$config->toArray(); // Returns ['foo' => 'foo']

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Troubleshooting

For general help and support join our GitHub Discussion or reach out on Twitter.

Please report bugs to the GitHub Issue Tracker.

Copyright

This project is liscensed under the MIT License.