PHP 5.4.36 Released

array_intersect_ukey

(PHP 5 >= 5.1.0)

array_intersect_ukeyComputes the intersection of arrays using a callback function on the keys for comparison

Opis

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

array_intersect_ukey() returns an array containing all the values of array1 which have matching keys that are present in all the arguments.

Parametry

array1

Initial array for comparison of the arrays.

array2

First array to compare keys against.

array

Variable list of array arguments to compare keys against.

key_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.

int callback ( mixed $a, mixed $b )

Zwracane wartości

Returns the values of array1 whose keys exist in all the arguments.

Przykłady

Przykład #1 array_intersect_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_intersect_ukey($array1$array2'key_compare_func'));
?>

Powyższy przykład wyświetli:

array(2) {
  ["blue"]=>
  int(1)
  ["green"]=>
  int(3)
}

In our example you see that only the keys 'blue' and 'green' are present in both arrays and thus returned. Also notice that the values for the keys 'blue' and 'green' differ between the two arrays. A match still occurs because only the keys are checked. The values returned are those of array1.

Zobacz też:

  • array_diff() - Zwraca różnice pomiędzy tablicami
  • array_udiff() - Computes the difference of arrays by using a callback function for data comparison
  • array_diff_assoc() - Oblicza różnicę między tablicami z dodatkowym sprawdzaniem kluczy
  • 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() - Oblicza różnicę tablic używając kluczy do porównań
  • array_diff_ukey() - Oblicza różnicę tablic używając funkcji zwrotnej do porównywania kluczy
  • array_intersect() - Zwraca przecięcie tablic
  • array_intersect_assoc() - Wylicza przecięcie tablic z dodatkowym sprawdzaniem indeksów
  • 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

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User Contributed Notes 1 note

up
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gk at anuary dot com
1 year ago
"array_intersect_ukey" will not work if $key_compare_func is using regular expression to perform comparison. "_array_intersect_ukey" fully implements the "array_intersect_ukey" interface and handles properly boolean comparison. However, the native implementation should be preferred for efficiency reasons.

<?php
$key_compare_func
= function ($a, $b) {
   
var_dump('a=' . $a. '; b=' . $b);
   
    if (
strpos($b, '/') === 0) {
        return
preg_match($b, $a) > 0 ? 0 : -1;
    }
   
    if (
$a == $b) {
       
$weight = 0;
    } else if (
$a > $b) {
       
$weight = 1;
    } else {
       
$weight = -1;
    }
   
   
var_dump('literal comparison: ' . $weight);
   
    return
$weight;
};

$foo = ['aab' => '', 'bbb' => '', 'ccb' => '', 'abb' => ''];
$bar = ['/[a-z]b[a-z]/' => ''];
$buz = ['/c[a-z][a-z]/' => ''];

echo
PHP_EOL . 'array_intersect_ukey' . PHP_EOL . PHP_EOL;

$subject = array_intersect_ukey ($foo, $bar, $buz, $key_compare_func);

echo
PHP_EOL;

var_dump($subject);

echo
PHP_EOL . '_array_intersect_ukey' . PHP_EOL . PHP_EOL;

$subject = _array_intersect_ukey($foo, $bar, $buz, $key_compare_func);

echo
PHP_EOL;

var_dump($subject);

/**
* @author Gajus Kuizinas <gk@anuary.com>
* @version 1.0.0 (2013 09 30)
* @url https://gist.github.com/gajus/271ad5f36337a32a184c
*/
function _array_intersect_ukey (array $arr1, array $arr2, $key_compare_func) {
   
$arr_matched = [];
   
$arr_unmatched = [];
   
   
$args = func_get_args();
   
   
$key_compare_func = end($args);
   
    foreach (
$arr1 as $k1 => $v1) {
        foreach (
$arr2 as $k2 => $v2) {
           
$diff = $key_compare_func($k1, $k2);
       
           
//var_dump('k1=' . $k1 . ', k2=' . $k2 . ', diff=' . $diff);
           
           
if ($diff === 0) {
               
$arr_matched[$k1] = $v1;
            } else {
               
$arr_unmatched[$k1] = $v1;
            }
        }
    }
   
    if (
count($args) <= 3) {
        return
$arr_matched;
    }
   
   
array_splice($args, 0, 2, [$arr_unmatched]);
   
    return
array_merge($arr_matched, call_user_func_array('_array_intersect_ukey', $args));
}

/*
array_intersect_ukey

string(12) "a=bbb; b=aab"
string(21) "literal comparison: 1"
string(12) "a=bbb; b=ccb"
string(22) "literal comparison: -1"
string(12) "a=abb; b=bbb"
string(22) "literal comparison: -1"
string(12) "a=aab; b=abb"
string(22) "literal comparison: -1"
string(22) "a=aab; b=/[a-z]b[a-z]/"
string(22) "a=abb; b=/[a-z]b[a-z]/"
string(22) "a=abb; b=/c[a-z][a-z]/"

array(0) {
}

_array_intersect_ukey

string(22) "a=aab; b=/[a-z]b[a-z]/"
string(22) "a=bbb; b=/[a-z]b[a-z]/"
string(22) "a=ccb; b=/[a-z]b[a-z]/"
string(22) "a=abb; b=/[a-z]b[a-z]/"
string(22) "a=aab; b=/c[a-z][a-z]/"
string(22) "a=ccb; b=/c[a-z][a-z]/"

array(3) {
  ["bbb"]=>
  string(0) ""
  ["abb"]=>
  string(0) ""
  ["ccb"]=>
  string(0) ""
}*/
?>
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