caridea-filter

Caridea is a miniscule PHP application library. This shrimpy fellow is what you'd use when you just want some helping hands and not a full-blown framework.

This is its value sanitation library.

Installation

You can install this library using Composer:

$ composer require caridea/filter

• The master branch (version 3.x) of this project requires PHP 7.1 and the mbstring extension.
• Version 2.x of this project requires PHP 7.0 and the mbstring extension.

Compliance

Releases of this library will conform to Semantic Versioning.

Our code is intended to comply with PSR-1, PSR-2, and PSR-4. If you find any issues related to standards compliance, please send a pull request!

Documentation

• Head over to Read the Docs

Examples

Just a few quick examples. Let's define a set of filters for a person record.

// let's pretend this came from $_POST
$input = [
    'name' => 'john smith  ',
    'birthday' => '1990-01-01__',
    'bio' => "Mistakenly written on Windows\r\nThat's a problem.  ",
    'friends' => 'Jane'
];

$registry = new \Caridea\Filter\Registry(); // you can register your own filters if you choose
$b = $registry->builder();
$b->always('name')->then('trim')->then('titlecase'); // always() will run chain even if missing from input
$b->field('birthday')->then('regex', '/[^0-9-]/', '');
$b->field('bio')->then('trim')->then('nl'); // convert to UNIX newlines
$b->always('species')->then('default', 'Homo sapiens');
$b->field('friends')->then('array')->each('trim'); // each() will run the filter on every element
// by default, all fields you don't specify are dropped.
// but! otherwise() can specify a fallback chain for any non-declared fields.
// $b->otherwise('trim')->then('default', null);
$filter = $b->build();
$output = $filter($input);
var_dump($output);

array(5) {
  'name' =>
  string(10) "John Smith"
  'birthday' =>
  string(10) "1990-01-01"
  'bio' =>
  string(47) "Mistakenly written on Windows
That's a problem."
  'species' =>
  string(12) "Homo sapiens"
  'friends' =>
  array(1) {
    [0] =>
    string(4) "Jane"
  }
}

You can also supply one or more Reducers which are intended to combine and rewrite multiple values at once.

// let's pretend this came from $_POST
$input = [
    'username' => '  doublecompile  ',
    'id-0' => '1',
    'id-5' => '4',
    'id-1' => '9'
];

$registry = new \Caridea\Filter\Registry();
$b = $registry->builder();
$b->always('username')->then('trim');
$b->reducer(Combiners::appender('ids', 'id-'));
$filter = $b->build();
$output = $filter($input);
var_dump($output);

array(2) {
  'username' =>
  string(13) "doublecompile"
  'ids' =>
  array(3) {
    [0] =>
    string(1) "1"
    [1] =>
    string(1) "4"
    [2] =>
    string(1) "9"
  }
}

The Filter class itself is a Reducer.