php-filter

A lightweight and easy method to filter arrays

map a callback onto your array

$data = ['a' => '   Foo '];
print_r(prepare($data)->map('trim')->getData()); // ['a' => 'Foo']

or apply a specific callback to one of the elements

$data = ['a' => 'foo', 'b' => 'bar'];
print_r(prepare($data)->apply(['a' => 'ucfirst'])->getData()); // ['a' => 'Foo', 'b' => 'bar']

only allow particular keys

$data = ['name' => '  foo ', 'age' => null, 'test' => false, 'quatz' => null];
print_r(prepare($data)->allowOnly(['name'])->getData()); // ['name' => '  foo ']

set defaults for missing or already filtered elements

$data = [];
print_r(prepare($data)->applyDefaults(['name' => 'Foo'])->getData()); // ['name' => 'Foo']

filter false / null / empty

$data = ['name' => '  foo ', 'age' => null, 'test' => false, 'quatz' => null];
print_r(prepare($data)->filter()->getData()); // ['name' => '  foo ']

filter by a own callback

$data = ['name' => '  foo ', 'age' => null, 'test' => false, 'quatz' => null];
print_r(prepare($data)->filterBy(function($v, $k) {
    return !empty($v);
})->getData()); // ['name' => '  foo ']

filter by specific rules (see the rule chapter below for further informations)

$rules = [
    'name' => 'string',
    'age'  => 'int(40, 100)',
    'foo'  => 'string(a+b+)',
    'bar'  => 'string(5)'
];

$data = ['name' => 'Foo', 'age' => 42, 'foo' => 'abb', 'bar' => 'quatz'];
print_r(prepare($data)->filterByRules($rules)->getData()); // ['name' => 'Foo', 'age' => 42, 'foo' => 'abb', 'bar' => 'quatz']

or filter by your own pattern

$pattern = [
    'name' => '#^\w+$#',
    'age'  => '#\d{2}#'
];

$data = ['name' => 'Foo', 'age' => 42];
print_r(prepare($data)->filterByPattern($pattern)->getData()); // ['name' => 'Foo', 'age' => 42]

---

Rules

Rules are one of

• <type>(<min>, <max>) whereby <min> and <max> are integers
• <type>(<limit>) whereby <limit> is an integer
• <type>(<pattern>) whereby <pattern> is a valid regex
• or only <type>

for <type> the following types are valid:

• numeric
• int(eger)
• float|double|real|decimal
• bool(ean)
• string
• array
• object|class