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    array_diff_ukey

    (PHP 5 >= 5.1.0, PHP 7)

    array_diff_ukey — Computes the difference of arrays using a callback function on the keys for comparison

    Descrierea

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

    Compares the keys from array against the keys from arrays 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.

    Parametri

    array

    The array to compare from

    arrays

    Arrays to compare against

    key_compare_func

    Funcția de comparare trebuie să întoarcă un întreg mai mic, egal cu sau mai mare decât zero dacă primul argument este considerat respectiv mai mic, egal cu sau mai mare decât al doilea argument. Notă: înainte de PHP 7.0.0 acest întreg trebuia să fie cuprins în domeniul de la -2147483648 până la 2147483647.

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

    Valorile întoarse

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

    Exemple

    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'));
    ?>

    Exemplul de mai sus va afișa:

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

    Note

    Notă:

    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');.

    A se vedea și

    • array_diff() - Calculează diferența dintre tablouri
    • array_udiff() - Computes the difference of arrays by using a callback function for data comparison
    • array_diff_assoc() - Computes the difference of arrays with additional index check
    • 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() - Computes the intersection of arrays
    • array_intersect_assoc() - Computes the intersection of arrays with additional index check
    • 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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