Uso e Exemplos do PHP array_diff_assoc()

PHP Array Function Manual

Definição e Uso

array_diff_assoc()função compara dois (ou mais) arrays e retorna a diferença.

esta função compara duas (ou mais) arrays de chaves e valores e retorna um array contendo1itens mas não no array2ou array3não existem itens no array...etc.

esta função é diferente dearray_diff()função, porque array_diff() usa apenas valores para comparar com outros arrays, enquantoarray_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 values, which do not exist in any other array with the same key.

PHP version

This function was first introduced in PHP version4.3introduced in version .0.

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

In this case, 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)$elem1 ===(string)$elem2only when the two values in the key=>value pair are considered equal.

<?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