array_diff_uassoc

(PHP 5, PHP 7, PHP 8)

array_diff_uassocComputes the difference of arrays with additional index check which is performed by a user supplied callback function

Descrizione

array_diff_uassoc ( array $array , array ...$arrays , callable $key_compare_func ) : array

Compares array against arrays and returns the difference. Unlike array_diff() the array keys are used in the comparison.

Unlike array_diff_assoc() a user supplied callback function is used for the indices comparison, not internal function.

Elenco dei parametri

array

The array to compare from

arrays

Arrays to compare against

key_compare_func

La funzione di confronto deve restituire un intero minore, uguale o maggiore di zero se il primo argomento è considerato essere minore, uguale o maggiore del secondo.

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

Valori restituiti

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

Esempi

Example #1 array_diff_uassoc() example

The "a" => "green" pair is present in both arrays and thus it is not in the output from the function. Unlike this, the pair 0 => "red" is in the output because in the second argument "red" has key which is 1.

<?php
function key_compare_func($a$b)
{
    if (
$a === $b) {
        return 
0;
    }
    return (
$a $b)? 1:-1;
}

$array1 = array("a" => "green""b" => "brown""c" => "blue""red");
$array2 = array("a" => "green""yellow""red");
$result array_diff_uassoc($array1$array2"key_compare_func");
print_r($result);
?>

Il precedente esempio visualizzerà:

Array
(
    [b] => brown
    [c] => blue
    [0] => red
)

The equality of 2 indices is checked by the user supplied callback function.

Note

Nota:

This function only checks one dimension of a n-dimensional array. Of course you can check deeper dimensions by using, for example, array_diff_uassoc($array1[0], $array2[0], "key_compare_func");.

Vedere anche:

  • array_diff() - Calcola la differenza di due o più array
  • array_diff_assoc() - Calcola la differenza tra due o più array con un ulteriore controllo sull'indice
  • array_udiff() - Computes the difference of arrays by using a callback function for data comparison
  • array_udiff_assoc() - Computes the difference of arrays with additional index check, compares data by a callback function
  • array_udiff_uassoc() - Computes the difference of arrays with additional index check, compares data and indexes by a callback function
  • array_intersect() - Calcola l'intersezione degli arrays
  • array_intersect_assoc() - Calcola l'intersezione degli array con un ulteriore controllo sugli indici
  • array_uintersect() - Computes the intersection of arrays, compares data by a callback function
  • array_uintersect_assoc() - Computes the intersection of arrays with additional index check, compares data by a callback function
  • array_uintersect_uassoc() - Computes the intersection of arrays with additional index check, compares data and indexes by separate callback functions

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User Contributed Notes 1 note

up
5
MD. ABU SAYEM
7 years ago
//array_diff_uassoc for multidimenssional array
$color_1=array('a'=>'white','b'=>'red','c'=>array('a'=>'green','b'=>'blue','c'=>'yellow'));
$color_2=array('a'=>'white','b'=>'red','c'=>array('a'=>'white','b'=>'red','c'=>'yellow'));

function key_compare($a,$b){
    if($a===$b)        return 0;
    return($a>$b)?1:-1;
}
print_r(array_diff_uassoc($color_1['c'], $color_2['c'],"key_compare"));

//Output
Array
(
    [a] => green
    [b] => blue
)
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