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--TEST-- Test array_diff() function : usage variations - comparing integers, float and string array values --FILE-- <?php /* Prototype : array array_diff(array $arr1, array $arr2 [, array ...]) * Description: Returns the entries of $arr1 that have values which are not * present in any of the others arguments. * Source code: ext/standard/array.c */ /* * Test how array_diff compares integers, floats and strings */ echo "*** Testing array_diff() : usage variations ***\n"; $arr_int = array(1, 2, 3); $arr_float = array(1.00, 2.00, 3.00); $arr_int_str = array('1', '2', '3'); $arr_float_str = array('1.00', '2.00', '3.00'); print "-- Compare integers and floats: --\n"; var_dump(array_diff($arr_int, $arr_float)); var_dump(array_diff($arr_float, $arr_int)); print "-- Compare integers and strings containing an integers: --\n"; var_dump(array_diff($arr_int, $arr_int_str)); var_dump(array_diff($arr_int_str, $arr_int)); print "-- Compare integers and strings containing floats: --\n"; var_dump(array_diff($arr_int, $arr_float_str)); var_dump(array_diff($arr_float_str, $arr_int)); print "-- Compare floats and strings containing integers: --\n"; var_dump(array_diff($arr_float, $arr_int_str)); var_dump(array_diff($arr_int_str, $arr_float)); print "-- Compare floats and strings containing floats: --\n"; var_dump(array_diff($arr_float, $arr_float_str)); var_dump(array_diff($arr_float_str, $arr_float)); print "-- Compare strings containing integers and strings containing floats: --\n"; var_dump(array_diff($arr_int_str, $arr_float_str)); var_dump(array_diff($arr_float_str, $arr_int_str)); echo "Done"; ?> --EXPECTF-- *** Testing array_diff() : usage variations *** -- Compare integers and floats: -- array(0) { } array(0) { } -- Compare integers and strings containing an integers: -- array(0) { } array(0) { } -- Compare integers and strings containing floats: -- array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) } array(3) { [0]=> string(4) "1.00" [1]=> string(4) "2.00" [2]=> string(4) "3.00" } -- Compare floats and strings containing integers: -- array(0) { } array(0) { } -- Compare floats and strings containing floats: -- array(3) { [0]=> float(1) [1]=> float(2) [2]=> float(3) } array(3) { [0]=> string(4) "1.00" [1]=> string(4) "2.00" [2]=> string(4) "3.00" } -- Compare strings containing integers and strings containing floats: -- array(3) { [0]=> string(1) "1" [1]=> string(1) "2" [2]=> string(1) "3" } array(3) { [0]=> string(4) "1.00" [1]=> string(4) "2.00" [2]=> string(4) "3.00" } Done