Verwendung und Beispiel des PHP array_diff_assoc() - Funktions

PHP Array Function Manual

Definition und Verwendung

array_diff_assoc()Funktion vergleicht zwei (oder mehrere) Arrays und gibt die Differenz zurück.

Diese Funktion vergleicht zwei (oder mehrere) Arrays von Schlüsseln und Werten und gibt ein Array1Einträge, die in array2oder array3und ... fehlende Einträge in der Liste.

dieser Funktionarray_diff()Funktion, da array_diff() nur Werte mit anderen Arrays vergleicht, währendarray_diff_assoc()The function uses both keys and values when comparing with other arrays.

Syntax

array array_diff_assoc(array $array1, array $array2　, array $array3];

Parameter

Return value

The array_diff_assoc() function returns an array that contains the array1contains all the values, which do not exist in any other array with the same key.

PHP version

This function was first introduced in PHP version4.3introduced.

Online example

Try the following example. Both arrays contain "a" => "orange" and "c" => "banana", so they will not appear in the result-

<?php
　　　$input1　= array("a" => "orange", "b" => "mango", "c" => "banana");
　　　$input2　= array("a" => "orange", "b" => "apple", "c" => "banana");
　　　print_r(array_diff_assoc($input1, $input2);
?>

Output result:

Array
(
　　　　[b] => mango
)

Online example

Here, the two arrays have different keys and corresponding values for all pairs, for example, "a" => "orange" does not exist in the second array, similarly, other key-value pairs also do not exist in the second array, so they will be available in the result-

<?php
　　　$input1　= array("a" => "orange", "b" => "mango", "c" => "banana");
　　　$input2　= array("a" => "banana", "b" => "apple", "c" => "orange");
　　　print_r(array_diff_assoc($input1, $input2);
?>

Output result:

Array
(
　　　　[a] => orange
　　　　[b] => mango
　　　　[c] => banana
)

Online example

The following example illustrates that only when (string)$elem1 ===(string)$elem2are considered equal only when the two values in the key=>value pair are the same.

<?php
　　　　$input1　= array(0,　5,　20);
　　　　$input2　= array("00", "05", "20);
　　　　$result = array_diff_assoc($input1, $input2);
　　　　print_r($result);
?>

Output result:

Array
(
　　　　[0] => 0
　　　　[1] =>　5
)

PHP Array Function Manual