array_uintersect_uassoc
I want to stress that in the user function, you do need to return either a 1 or a -1 properly; you cannot simply return 0 if the results are equal and 1 if they are not.
The following code is incorrect:
<?php
function myfunction($v1,$v2)
{
if ($v1===$v2)
{
return 0;
}
return 1;
}
$a1=array(1, 2, 4);
$a2=array(1, 3, 4);
print_r(array_uintersect($a1,$a2,"myfunction"));
?>
This code is correct:
<?php
function myfunction($v1,$v2)
{
if ($v1===$v2)
{
return 0;
}
if ($v1 > $v2) return 1;
return -1;
}
$a1=array(1, 2, 4);
$a2=array(1, 3, 4);
print_r(array_uintersect($a1,$a2,"myfunction"));
?>
array_uintersect
(PHP 5)
array_uintersect — Computes the intersection of arrays, compares data by a callback function
Descrizione
array array_uintersect
( array
$array1
, array $array2
[, array $ ...
], callable $data_compare_func
)Computes the intersection of arrays, compares data by a callback function.
Elenco dei parametri
-
array1 -
The first array.
-
array2 -
The second array.
-
data_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.
Valori restituiti
Returns an array containing all the values of array1
that are present in all the arguments.
Esempi
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"));
?>
Il precedente esempio visualizzerà:
Array
(
[a] => green
[b] => brown
[0] => red
)
Vedere anche:
- array_intersect() - Calcola l'intersezione degli arrays
- array_intersect_assoc() - Calcola l'intersezione degli array con un ulteriore controllo sugli indici
- 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 a callback functions
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User Contributed Notes
array_uintersect - [1 notes]
Nate at RuggFamily dot com ¶
6 years ago