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Web-PHP

PHP / array_udiff_uassoc — DevDocs

array_udiff_uassoc

(PHP 5, PHP 7, PHP 8)

array_udiff_uassoc — Computes the difference of arrays with additional index check, compares data and indexes by a callback function

Description

array_udiff_uassoc(
 array $array,
 array ...$arrays,
 callable $value_compare_func,
 callable $key_compare_func
): array

Computes the difference of arrays with additional index check, compares data and indexes by a callback function.

Note that the keys are used in the comparison unlike array_diff() and array_udiff() .

Parameters

array

The first array.

arrays

Arrays to compare against.

value_compare_func

The comparison function must return an integer less than, equal to, or greater than zero if the first argument is considered to be respectively less than, equal to, or greater than the second.

callback(mixed $a, mixed $b): int

key_compare_func

The comparison of keys (indices) is done also by the callback function key_compare_func . This behaviour is unlike what array_udiff_assoc() does, since the latter compares the indices by using an internal function.

Return Values

Returns an array containing all the values from array that are not present in any of the other arguments.

Examples

Example #1 array_udiff_uassoc() example

<?php
class cr {
    private $priv_member;
    function __construct($val)
    {
        $this->priv_member = $val;
    }

    static function comp_func_cr($a, $b)
    {
        if ($a->priv_member === $b->priv_member) return 0;
        return ($a->priv_member > $b->priv_member)? 1:-1;
    }

    static function comp_func_key($a, $b)
    {
        if ($a === $b) return 0;
        return ($a > $b)? 1:-1;
    }
}
$a = array("0.1" => new cr(9), "0.5" => new cr(12), 0 => new cr(23), 1=> new cr(4), 2 => new cr(-15),);
$b = array("0.2" => new cr(9), "0.5" => new cr(22), 0 => new cr(3), 1=> new cr(4), 2 => new cr(-15),);

$result = array_udiff_uassoc($a, $b, array("cr", "comp_func_cr"), array("cr", "comp_func_key"));
print_r($result);
?>

The above example will output:

Array
(
    [0.1] => cr Object
        (
            [priv_member:private] => 9
        )

    [0.5] => cr Object
        (
            [priv_member:private] => 12
        )

    [0] => cr Object
        (
            [priv_member:private] => 23
        )
)

In our example above you see the "1" => new cr(4) pair is present in both arrays and thus it is not in the output from the function. Keep in mind that you have to supply 2 callback functions.

Notes

Note : Please note that this function only checks one dimension of a n-dimensional array. Of course you can check deeper dimensions by using, for example, array_udiff_uassoc($array1[0], $array2[0], "data_compare_func", "key_compare_func"); .

PHP / array_uintersect — DevDocs

array_uintersect

(PHP 5, PHP 7, PHP 8)

array_uintersect — Computes the intersection of arrays, compares data by a callback function

Description

array_uintersect(array $array, array ...$arrays, callable $value_compare_func): array

Computes the intersection of arrays, compares data by a callback function.

Parameters

array

The first array.

arrays

Arrays to compare against.

value_compare_func

The comparison function must return an integer less than, equal to, or greater than zero if the first argument is considered to be respectively less than, equal to, or greater than the second.

callback(mixed $a, mixed $b): int

Return Values

Returns an array containing all the values of array that are present in all the arguments.

Examples

Example #1 array_uintersect() example

<?php
$array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");
$array2 = array("a" => "GREEN", "B" => "brown", "yellow", "red");

print_r(array_uintersect($array1, $array2, "strcasecmp"));
?>

The above example will output:

Array
(
    [a] => green
    [b] => brown
    [0] => red
)

PHP / array_uintersect_assoc — DevDocs

array_uintersect_assoc

(PHP 5, PHP 7, PHP 8)

array_uintersect_assoc — Computes the intersection of arrays with additional index check, compares data by a callback function

Description

array_uintersect_assoc(array $array, array ...$arrays, callable $value_compare_func): array

Computes the intersection of arrays with additional index check, compares data by a callback function.

Note that the keys are used in the comparison unlike in array_uintersect() . The data is compared by using a callback function.

Parameters

array

The first array.

arrays

Arrays to compare against.

value_compare_func

The comparison function must return an integer less than, equal to, or greater than zero if the first argument is considered to be respectively less than, equal to, or greater than the second.

callback(mixed $a, mixed $b): int

Return Values

Returns an array containing all the values of array that are present in all the arguments.

Examples

Example #1 array_uintersect_assoc() example

<?php
$array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");
$array2 = array("a" => "GREEN", "B" => "brown", "yellow", "red");

print_r(array_uintersect_assoc($array1, $array2, "strcasecmp"));
?>

The above example will output:

Array
(
    [a] => green
)

PHP / array_uintersect_uassoc — DevDocs

array_uintersect_uassoc

(PHP 5, PHP 7, PHP 8)

array_uintersect_uassoc — Computes the intersection of arrays with additional index check, compares data and indexes by separate callback functions

Description

array_uintersect_uassoc(
 array $array1,
 array ...$arrays,
 callable $value_compare_func,
 callable $key_compare_func
): array

Computes the intersection of arrays with additional index check, compares data and indexes by separate callback functions.

Parameters

array1

The first array.

arrays

Further arrays.

value_compare_func

The comparison function must return an integer less than, equal to, or greater than zero if the first argument is considered to be respectively less than, equal to, or greater than the second.

callback(mixed $a, mixed $b): int

key_compare_func

Key comparison callback function.

Return Values

Returns an array containing all the values of array1 that are present in all the arguments.

Examples

Example #1 array_uintersect_uassoc() example

<?php
$array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");
$array2 = array("a" => "GREEN", "B" => "brown", "yellow", "red");

print_r(array_uintersect_uassoc($array1, $array2, "strcasecmp", "strcasecmp"));
?>

The above example will output:

Array
(
    [a] => green
    [b] => brown
)

PHP / array_unique — DevDocs

array_unique

(PHP 4 >= 4.0.1, PHP 5, PHP 7, PHP 8)

array_unique — Removes duplicate values from an array

Description

array_unique(array $array, int $flags = SORT_STRING): array

Takes an input array and returns a new array without duplicate values.

Note that keys are preserved. If multiple elements compare equal under the given flags , then the key and value of the first equal element will be retained.

Note : Two elements are considered equal if and only if (string) $elem1 === (string) $elem2 i.e. when the string representation is the same, the first element will be used.

Parameters

array

The input array.

flags

The optional second parameter flags may be used to modify the sorting behavior using these values:

Sorting type flags:

SORT_REGULAR - compare items normally (don't change types)
SORT_NUMERIC - compare items numerically
SORT_STRING - compare items as strings
SORT_LOCALE_STRING - compare items as strings, based on the current locale.

Return Values

Returns the filtered array.

Changelog

Version	Description
7.2.0	If `flags` is `SORT_STRING` , formerly `array` has been copied and non-unique elements have been removed (without packing the array afterwards), but now a new array is built by adding the unique elements. This can result in different numeric indexes.

Examples

Example #1 array_unique() example

<?php
$input = array("a" => "green", "red", "b" => "green", "blue", "red");
$result = array_unique($input);
print_r($result);
?>

The above example will output:

Array
(
    [a] => green
    [0] => red
    [1] => blue
)

Example #2 array_unique() and types

<?php
$input = array(4, "4", "3", 4, 3, "3");
$result = array_unique($input);
var_dump($result);
?>

The above example will output:

array(2) {
  [0] => int(4)
  [2] => string(1) "3"
}

Notes

Note : Note that array_unique() is not intended to work on multi dimensional arrays.

PHP / array_unshift — DevDocs

array_unshift

(PHP 4, PHP 5, PHP 7, PHP 8)

array_unshift — Prepend one or more elements to the beginning of an array

Description

array_unshift(array &$array, mixed ...$values): int

array_unshift() prepends passed elements to the front of the array . Note that the list of elements is prepended as a whole, so that the prepended elements stay in the same order. All numerical array keys will be modified to start counting from zero while literal keys won't be changed.

Note :

Resets array's internal pointer to the first element.

Parameters

array: The input array.
values: The values to prepend.

Return Values

Returns the new number of elements in the array .

Changelog

Version	Description
7.3.0	This function can now be called with only one parameter. Formerly, at least two parameters have been required.

Examples

Example #1 array_unshift() example

<?php
$queue = [
    "orange",
    "banana"
];

array_unshift($queue, "apple", "raspberry");
var_dump($queue);
?>

The above example will output:

array(4) {
  [0] =>
  string(5) "apple"
  [1] =>
  string(9) "raspberry"
  [2] =>
  string(6) "orange"
  [3] =>
  string(6) "banana"
}

Example #2 Usage with associative arrays

If one associative array is prepended to another associative array, the prepended array is numerically indexed into the former array.

<?php
$foods = [
    'apples' => [
        'McIntosh' => 'red',
        'Granny Smith' => 'green',
    ],
    'oranges' => [
        'Navel' => 'orange',
        'Valencia' => 'orange',
    ],
];
$vegetables = [
    'lettuce' => [
        'Iceberg' => 'green',
        'Butterhead' => 'green',
    ],
    'carrots' => [
        'Deep Purple Hybrid' => 'purple',
        'Imperator' => 'orange',
    ],
    'cucumber' => [
        'Kirby' => 'green',
        'Gherkin' => 'green',
    ],
];

array_unshift($foods, $vegetables);
var_dump($foods);

The above example will output:

array(3) {
  [0] =>
  array(3) {
    'lettuce' =>
    array(2) {
      'Iceberg' =>
      string(5) "green"
      'Butterhead' =>
      string(5) "green"
    }
    'carrots' =>
    array(2) {
      'Deep Purple Hybrid' =>
      string(6) "purple"
      'Imperator' =>
      string(6) "orange"
    }
    'cucumber' =>
    array(2) {
      'Kirby' =>
      string(5) "green"
      'Gherkin' =>
      string(5) "green"
    }
  }
  'apples' =>
  array(2) {
    'McIntosh' =>
    string(3) "red"
    'Granny Smith' =>
    string(5) "green"
  }
  'oranges' =>
  array(2) {
    'Navel' =>
    string(6) "orange"
    'Valencia' =>
    string(6) "orange"
  }
}

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Web-PHP

PHP / array_udiff_uassoc — DevDocs

array_udiff_uassoc

Description

Parameters

Return Values

Examples

Notes

See Also

PHP / array_uintersect — DevDocs

array_uintersect

Description

Parameters

Return Values

Examples

See Also

PHP / array_uintersect_assoc — DevDocs

array_uintersect_assoc

Description

Parameters

Return Values

Examples

See Also

PHP / array_uintersect_uassoc — DevDocs

array_uintersect_uassoc

Description

Parameters

Return Values

Examples

See Also

PHP / array_unique — DevDocs

array_unique

Description

Parameters

Return Values

Changelog

Examples

Notes

See Also

PHP / array_unshift — DevDocs

array_unshift

Description

Parameters

Return Values

Changelog

Examples

See Also