SunshinePHP Developer Conference 2015

array_diff_ukey

(PHP 5 >= 5.1.0)

array_diff_ukeyComputes the difference of arrays using a callback function on the keys for comparison

Descrizione

array array_diff_ukey ( array $array1 , array $array2 [, array $... ], callable $key_compare_func )

Compares the keys from array1 against the keys from array2 and returns the difference. This function is like array_diff() except the comparison is done on the keys instead of the values.

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

Elenco dei parametri

array1

The array to compare from

array2

An array to compare against

...

More 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.

int callback ( mixed $a, mixed $b )

Valori restituiti

Returns an array containing all the entries from array1 that are not present in any of the other arrays.

Esempi

Example #1 array_diff_ukey() example

<?php
function key_compare_func($key1$key2)
{
    if (
$key1 == $key2)
        return 
0;
    else if (
$key1 $key2)
        return 
1;
    else
        return -
1;
}

$array1 = array('blue'  => 1'red'  => 2'green'  => 3'purple' => 4);
$array2 = array('green' => 5'blue' => 6'yellow' => 7'cyan'   => 8);

var_dump(array_diff_ukey($array1$array2'key_compare_func'));
?>

Il precedente esempio visualizzerà:

array(2) {
  ["red"]=>
  int(2)
  ["purple"]=>
  int(4)
}

Note

Nota:

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

Vedere anche:

  • array_diff() - Calcola la differenza di due o più array
  • array_udiff() - Computes the difference of arrays by using a callback function for data comparison
  • array_diff_assoc() - Calcola la differenza tra due o più array con un ulteriore controllo sull'indice
  • array_diff_uassoc() - Computes the difference of arrays with additional index check which is performed by a user supplied callback function
  • 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_diff_key() - Computes the difference of arrays using keys for comparison
  • array_intersect() - Calcola l'intersezione degli arrays
  • array_intersect_assoc() - Calcola l'intersezione degli array con un ulteriore controllo sugli indici
  • array_intersect_uassoc() - Computes the intersection of arrays with additional index check, compares indexes by a callback function
  • array_intersect_key() - Computes the intersection of arrays using keys for comparison
  • array_intersect_ukey() - Computes the intersection of arrays using a callback function on the keys for comparison

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