(PHP 4 >= 4.0.1)
array_diff -- Computes the difference of arrays
Description
array array_diff (array array1, array array2 [, array
...])
Array_diff() returns an array
containing all the values of array1
that are not present in any of the other arguments.
Note that keys are preserved.
Example 1. Array_diff() example
$array1 = array ("a" => "green", "red", "blue");
$array2 = array ("b" => "green", "yellow", "red");
$result = array_diff ($array1, $array2);
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This makes $result have array
("blue");
See also array_intersect().
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