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--TEST-- Test array_merge_recursive() function : usage variations - array with reference variables --FILE-- <?php /* Prototype : array array_merge_recursive(array $arr1[, array $...]) * Description: Recursively merges elements from passed arrays into one array * Source code: ext/standard/array.c */ /* * Testing the functionality of array_merge_recursive() by passing * array having reference variables. */ echo "*** Testing array_merge_recursive() : array with reference variables for \$arr1 argument ***\n"; $value1 = 10; $value2 = "hello"; $value3 = 0; $value4 = &$value2; // input array containing elements as reference variables $arr1 = array( 0 => 0, 1 => &$value4, 2 => &$value2, 3 => "hello", 4 => &$value3, $value4 => &$value2 ); // initialize the second argument $arr2 = array($value4 => "hello", &$value2); echo "-- With default argument --\n"; var_dump( array_merge_recursive($arr1) ); echo "-- With more arguments --\n"; var_dump( array_merge_recursive($arr1, $arr2) ); echo "Done"; ?> --EXPECTF-- *** Testing array_merge_recursive() : array with reference variables for $arr1 argument *** -- With default argument -- array(6) { [0]=> int(0) [1]=> &string(5) "hello" [2]=> &string(5) "hello" [3]=> string(5) "hello" [4]=> &int(0) ["hello"]=> &string(5) "hello" } -- With more arguments -- array(7) { [0]=> int(0) [1]=> &string(5) "hello" [2]=> &string(5) "hello" [3]=> string(5) "hello" [4]=> &int(0) ["hello"]=> array(2) { [0]=> string(5) "hello" [1]=> string(5) "hello" } [5]=> &string(5) "hello" } Done