README

Quickly retrieve your PHP data.

From

/config
  /database
    database.php
    option.php
  app.php

To

$fetch = new Fetch('config');

$command = $fetch->from('database.option.initial-command');

Summary

• Prerequistes
• Installation
• Examples of uses
• Prototype ready
• Methods definitions
• MIT licence

Prerequisites

• PHP version >= 7.0.0

Installation

In your project folder:

composer require khalyomede/fetch:1.*

Examples of uses

All the examples below assume we are on the root (inside the index.php file) and we have the following arborescence:

/config
  /database
    database.php
    option.php
  app.php
index.php

• Example 1: fetching a data from a simple file
• Example 2: fetching a data by traversing multiple folders
• Example 3: fetching a data inside nested keys
• Example 4: fetching some data using a specific key
• Example 5: fetching faster using cache
• Example 6: using a function before actually fetching the data

Example 1: fetching a data from a simple file

All the configuration file should return a PHP array.

Let us assume the file app.php contains:

return [
  'name' => 'My app',
  'charset' => 'utf-8'
];

We can fetch the charset using:

use Khalyomede\Fetch;

$fetch = new Fetch( __DIR__ . '/config' );

$charset = $fetch->from('app.charset');

print_r($charset);

This will display

utf-8

Example 2: fetching a data by traversing multiple folders

All the configuration files should return a PHP array.

Let us assume the file option.php contains:

return [
  'initial-command' => "SET names 'utf-8'"
];

use Khalyomede\Fetch;

$fetch = new Fetch( __DIR__ . '/config' );

$initial_command = $fetch->from('database.option.initial-command');

print_r($initial_command);

Will display

SET names 'utf-8'

Example 3: fetching a data inside nested keys

All configuration files should return a PHP array.

Let us assume the file option.php contains:

return [
  'cache' => [
    'strategy' => 'cache-first'
  ]
];

use Khalyomede\Fetch;

$fetch = new Fetch( __DIR__ . '/config' );

$strategy = $fetch->from('database.option.cache.strategy');

print_r($stategy);

Will display:

cache-first

Example 4: fetching some data using a specific key

All configuration files should return PHP array.

Let us assume the file option.php contains:

return [
  'cache' => [
    'strategy' => 'cache-first'
  ],
  'timeout' => 12.5
];

use Khalyomede\Fetch;

$fetch = new Fetch( __DIR__ . '/config' );

$data = $fetch->from('database.option');

print_r($data);

Will display:

Array
(
  [cache] => Array
    (
      [strategy] => cache-first
    )
  [timeout] => 12.5
)

Example 5: fetching faster using cache

Let us assume a new folder has been created, called cache. Here is the updated arborescence:

/config
  /database
    option.php
  app.php
/cache
index.php

use Khalyomede\Fetch;

$fetch = new Fetch( __DIR__ . '/config' );

$fetch->usingCache( __DIR__ . '/cache' );

$charset = $fetch->from('app.charset');

The first fetching might be slow, but the subsequent fetches will be much more faster while the cached data is not removed.

Note

This library will not handles the cache removing.

Tips

Think to disable the cache when you are in development mode as your configuration file will changed a lot and might be outdated without updating to the new value. This tips features Laravel 5 debug helper.

use Khalyomede\Fetch;

// ...

$fetch = new Fetch( base_path() . '/config' );

if( config('app.debug') !== true ) {
  $fetch->usingCache( base_path() . '/' )
}

$language = $fetch->from('app.locale');

Warning

The cache might be outdated if you use it without clearing it after an update of your configuration data.

Example 6: using a function before actually fetching the data

You can apply "middleware" function before fetching/caching the data if needed.

use Khalyomede\Fetch;

$fetch = new Fetch( __DIR__ . '/config' );

$remove_dashes = function ($data) {
  return str_replace('-', '', $data);
};

$charset = $fetch->across($remove_dashes)->from('app.charset');

print_r($charset);

Will display

utf8

Note

The anonymous takes only one parameter and it can be frustrating. Use use statement to help you pass more arguments and overcome this constraint:

use Khalyomede\Fetch;

$fetch = new Fetch( __DIR__ . '/config' );

$now = (new DateTime())->format('Y-m-d');

$charset = $fetch->across(function($data) use($now) {
  return "$data ($now)";
})->from('app.charset');

print_r($charset);

Will display

utf-8 (2018-03-03)

Note 2

Once the function is set, it is applyied for any further fetches. If you want to remove the function, you can use uncross() to do so:

use Khalyomede\Fetch;

$fetch = new Fetch( __DIR__ . '/config' );

$fetch->across(function($data) {
  return str_replace('-', '', $data);
});

$charset = $fetch->from('app.charset'); 

print_r($charset);

$fetch->uncross(); // or $fetch->uncross()->from('...');

$timeout = $fetch->from('database.option.timeout');

print_r($timeout);

Will display

utf8
12.5

Prototype ready

This class lets you extend its functionality to your needs without having to dive into the source code. For example:

$fetch->prototype('exists', function($path) {
  $exists = false;

  try {
    $this->from($path);

    $exists = true;
  }
  catch(Exception $e) {}

  return $exists;
});

if($fetch->exists('test')) {
  echo $fetch->from('test');
}
else {
  echo 'this configuration does not exists';
}

For more information, check khalyomede/prototype documentation.

Methods definitions

• across()
• construct()
• crypt()
• decrypt()
• disableCache()
• enableCache()
• from()
• uncross()
• usingCache()

construct()

Sets the default folder to fetch the data from.

public function __construct(string $folder_path): Fetch

Exceptions

InvalidArgumentException:

• If the folder path does not exists
• If the folder path is not a folder

from()

Fetch the data from the given path.

public function from(string $path): mixed

Exceptions

InvalidArgumentException:

• If the path is empty
• If one of the key is empty (for example: "database.option.")
• If the targeted configuration file does not return an array
• If the path targets an non existing key

UnexpectedValueException:

• If the cache folder has not been specifyied when the cache mode has been enabled

RuntimeException:

• If the targeted configuration file is not available is read mode
• If the cached data file is not available in read mode

usingCache()

Specify the folder for storing the cached data and enable the cache mode.

public function usingCache(string $cache_folder_path): Fetch

Exceptions

InvalidArgumentException:

• If the folder does not exists
• If the path does not target a folder

enableCache()

Enable the cache mode.

public function enableCache(): Fetch

disableCache()

Disable the cache mode.

public function disableCache(): Fetch

encrypt()

Useful when you need to get the same files name to perform additional processes from a path.

public function encrypt(string $string): string

decrypt()

Useful when you want to get the original path used for storing the cached file using the cached file name.

public function decrypt(string $string): string

Note

Do not include the file extension (.php) when decrypting using the file name.

across()

Apply a function (which should be an anonymous, i.e. a closure) before fetching or caching the data. The function should have only one parameter, which will be filled with the fetched data.

public function across(callable $function): Fetch

Exceptions

InvalidArgumentException:

• If the function is not an anonymous function (i.e. a closure)
• If the function does not have exactly one parameter
• If the function does not have exactly one required parameter

ReflectionException:

• Check the package website for more information

uncross()

Removes the previously set function (made by Fetch::across).

public function uncross(): Fetch

MIT Licence

Fetch

Copyright © 2018 Khalyomede

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the oftware, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN CTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.