README

This adds functions about array. If you feel like there few php built-in functions about array, this will be useful.

Installation

if you're using Composer to manage dependencies, you can include the following in your composer.json file:

"require": {
    "mitsuru793/array-helper-function
}

Then, after running composer update or php composer.phar update, you can load the class using Composer's autoloading:

require 'vendor/autoload.php';

Functions

condtion

• is_empty_array
• is_full_array
• is_numeric_array
• is_numeric_array_recursive
• array_every
• array_any

each

• array_keys_recursive
• array_diff_key_recursive
• array_filter_recursive

access

• array_get
• array_set
• array_unset
• array_pick

Function detail

is_empty_array($value): bool

Finds whether a variable is a empty array.

return true when value is

• []

returns false when value is

• not array(ex: 0, 1, true, null ...)
• [1, 2]
• [null]
• [[], []]

is_empty_array([]) // true

is_full_array($value): bool

Finds whether a variable is a full array, so it's not empty array.

return true when value is

• [1, 2]
• [null]
• [[], []]

returns false when value is

• []
• not array(ex: 0, 1, true, null ...)

is_full_array([1]) // true

is_numeric_array($value): bool

Finds whether all keys of variable are integer. This does not find deeply if element of $value is array.

return true when value is

• []
• [null]
• [['k1' => 'v1'], 'v2]

returns false when value is

• not array(ex: 0, 1, true, null ...)
• ['k1' => 'v1', 'v2]

is_numeric_array([1]) // true

is_numeric_array_recursive($array): bool

Finds whether all keys of variable are integer deeply. This is like is_numeric_array

return true when value is

• []
• [null]

returns false when value is

• not array(ex: 0, 1, true, null ...)
• ['k1' => 'v1', 'v2]
• [['k1' => 'v1'], 'v2]

is_numeric_array_recursive([1]) // true

array_every(array $array, callable $test = null): bool

Verify that all elements of a $array pass a given truth $test.

array_every([1, 2, 3], function ($value, $key) {
    retrun $value > 2;
});
// false

If the $array is empty, every will return true.

array_every([]) // true

If the $test is null, verify all them are truly.

array_every([1, 2, 3]);
// true

array_any(array $array, callable $test = null): bool

Verify that a element of a $array pass a given truth $test.

array_every([1, 2, 3], function ($value, $key) {
    retrun $value > 2;
});
// true

If the $array is empty, every will return false.

array_every([]) // false

If the $test is null, verify one is truly.

array_every([1, 2, 3]);
// true

array_keys_recursive(array $array): array

This is like array_keys, but recursively. Return combinations of all keys.

$array = [
    'Japan' => [
        'Tokyo' => [
            'user1' => 'Mike',
            'user2' => 'Jane',
            'Hiro',
            'Hanako',
        ],
        'Kyoto' => [],
    ],
    'Take',
];

array_keys_recursive($array);
// [
//     ['Japan', 'Tokyo', 'user1'],
//     ['Japan', 'Tokyo', 'user2'],
//     ['Japan', 'Tokyo', 0],
//     ['Japan', 'Tokyo', 1],
//     ['Japan', 'Kyoto'],
//     0,
// ]

array_diff_key_recursive(array $main, array $other): array

This is like array_diff_key, but recursively.

$main = [
    'user' => [
        'name' => 'Mike',
        'age' => 20,
    ],
];
$other = [
    'id' => 2,
    'user' => [
        'name' => 'Jane',
        'from' => 'America',
        'sex' => 'woman',
    ],
];

array_diff_key_recursive($main, $other));
// [
//     'user' => [
//         'age' => 20
//     ]
// ] 

array_diff_key_recursive($other, $main));
// [
//     'id' => 2,
//     'user' => [
//         'from' => 'America',
//         'sex' => 'woman',
//     ],
// ]

array_filter_recursive($array, callable $test = null): array

This is like array_filter, but recursively. The closure $test is passed $key by default.

$array = [
    'Japan' => [
        'Hiroki-Man',
        'Kaede-Woman',
        'Tokyo' => [
            'Taro-Man',
            'Hanako-Woman',
        ],
    ],
    'America' => [
        'Jane-Woman',
        'Mike-Man',
    ],
];

array_filter_recursive($array, function ($v, $k) {
    if (!is_string($v)) {
        return true;
    }
    return preg_match('/Man/', $v);
});
// [
//     'Japan' => [
//         'Hiroki-Man',
//         'Tokyo' => [
//             'Taro-Man',
//         ],
//     ],
//     'America' => [
//         1 => 'Mike-Man',
//     ],
// ]

array_get(array $array, $path, string $separator = '.')

Retrieves a value from a nested array. Notation of $path is dot or array. If $path is string, you can modify its separator from dot as 3rd argument.

$array = [
    'user' => [
        'name' => 'mike',
    ],
];

array_get($array, ['user', 'name']);
array_get($array, 'user.name');
array_get($array, 'user_name', '_');
// mike

array_get($array, 'invalid');
// null

array_set(array &$array, $path, $value, string $separator = '.'): void

Set a $value within a nested array. Notation of $path is dot or array. If $path is string, you can modify its separator from dot as 3rd argument.

$array = [];

array_set($array, ['user', 'name'], 'Mike');
array_set($array, 'user.name', 'Mike');
array_set($array, 'user_name', 'Mike', '_');

$array;
// [
//     'user' => [
//         'name' => 'Mike'
//     ]
// ]

array_unset(array &$array, $path, string $separator = '.'): void

Set a $value within a nested array. Notation of $path is dot or array. If $path is string, you can modify its separator from dot as 3rd argument.

$array = [
    'user' => [
        'name' => 'Mike',
    ],
];

array_unset($array, ['user', 'name']);
array_unset($array, 'user.name');
array_unset($array, 'user_name', '_');

$array;
// [
//     'user' => []
// ]

array_pick(array &$array, array $values): array

Find whether $values match elements of $array strictly, and takes matched values from $array. Has side effect and modify $array.

$array = ['a', null, true, 'b'];


$picked;
// [0 => 'a', 2 => true]

$array;
// [1 => null, 3 => 'b']