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--TEST-- Test array_intersect() function : basic functionality --FILE-- <?php /* Prototype : array array_intersect(array $arr1, array $arr2 [, array $...]) * Description: Returns the entries of arr1 that have values which are present in all the other arguments * Source code: ext/standard/array.c */ /* * Testing the behavior of array_intersect() by passing different arrays for the arguments. * Function is tested by passing associative array as well as array with default keys. */ echo "*** Testing array_intersect() : basic functionality ***\n"; // array with default keys $arr_default_keys = array(1, 2, "hello", 'world'); // associative array $arr_associative = array("one" => 1, "two" => 2); // default key array for both $arr1 and $arr2 argument var_dump( array_intersect($arr_default_keys, $arr_default_keys) ); // default key array for $arr1 and associative array for $arr2 argument var_dump( array_intersect($arr_default_keys, $arr_associative) ); // associative array for $arr1 and default key array for $arr2 var_dump( array_intersect($arr_associative, $arr_default_keys) ); // associative array for both $arr1 and $arr2 argument var_dump( array_intersect($arr_associative, $arr_associative) ); // more arrays to be intersected $arr3 = array(2, 3, 4); var_dump( array_intersect($arr_default_keys, $arr_associative, $arr3) ); var_dump( array_intersect($arr_associative, $arr_default_keys, $arr3, $arr_associative) ); echo "Done"; ?> --EXPECTF-- *** Testing array_intersect() : basic functionality *** array(4) { [0]=> int(1) [1]=> int(2) [2]=> string(5) "hello" [3]=> string(5) "world" } array(2) { [0]=> int(1) [1]=> int(2) } array(2) { ["one"]=> int(1) ["two"]=> int(2) } array(2) { ["one"]=> int(1) ["two"]=> int(2) } array(1) { [1]=> int(2) } array(1) { ["two"]=> int(2) } Done