Compares array1
against array2
and returns the difference. Unlike array_diff() the array keys are also used in the comparison.
The array to compare from
An array to compare against
More arrays to compare against
Returns an array containing all the values from array1
that are not present in any of the other arrays.
In this example you see the "a" => "green" pair is present in both arrays and thus it is not in the output from the function. Unlike this, the pair 0 => "red" is in the output because in the second argument "red" has key which is 1.
<?php $array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red"); $array2 = array("a" => "green", "yellow", "red"); $result = array_diff_assoc($array1, $array2); print_r($result); ?>
The above example will output:
Array ( [b] => brown [c] => blue [0] => red )
Two values from key => value pairs are considered equal only if (string) $elem1 === (string) $elem2 . In other words a strict check takes place so the string representations must be the same.
<?php $array1 = array(0, 1, 2); $array2 = array("00", "01", "2"); $result = array_diff_assoc($array1, $array2); print_r($result); ?>
The above example will output:
Array ( [0] => 0 [1] => 1 )
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