--TEST-- Test array_unique() function : usage variations - different arrays for 'input' argument --FILE-- 22 'single quoted string' "double quoted string" 2222 != 1111.\t 0000 = 0000\n EOT; // arrays passed to $input argument $inputs = array ( /*1*/ array(1, 2, 2, 1), // with default keys and numeric values array(1.1, 2.2, 1.1), // with default keys & float values array(false, true, false), // with default keys and boolean values array(), // empty array /*5*/ array(NULL, null), // with NULL array("a\v\f", "aaaa\r", "b", "aaaa\r", "\[\]\!\@\#\$\%\^\&\*\(\)\{\}"), // with double quoted strings array('a\v\f', 'aaaa\r', 'b', 'aaaa\r', '\[\]\!\@\#\$\%\^\&\*\(\)\{\}'), // with single quoted strings array("h1" => $blank_line, "h2" => $multiline_string, "h3" => $diff_whitespaces, $blank_line), // with heredocs // associative arrays /*9*/ array(1 => "one", 2 => "two", 2 => "two"), // explicit numeric keys, string values array("one" => 1, "two" => 2, "1" => 1 ), // string keys & numeric values array( 1 => 10, 2 => 20, 4 => 40, 5 => 10), // explicit numeric keys and numeric values array( "one" => "ten", "two" => "twenty", "10" => "ten"), // string key/value array("one" => 1, 2 => "two", 4 => "four"), //mixed // associative array, containing null/empty/boolean values as key/value /*14*/ array(NULL => "NULL", null => "null", "NULL" => NULL, "null" => null), array(true => "true", false => "false", "false" => false, "true" => true), array("" => "emptyd", '' => 'emptys', "emptyd" => "", 'emptys' => ''), array(1 => '', 2 => "", 3 => NULL, 4 => null, 5 => false, 6 => true), /*18*/ array('' => 1, "" => 2, NULL => 3, null => 4, false => 5, true => 6), ); // loop through each sub-array of $inputs to check the behavior of array_unique() $iterator = 1; foreach($inputs as $input) { echo "-- Iteration $iterator --\n"; var_dump( array_unique($input, SORT_STRING) ); $iterator++; } echo "Done"; ?> --EXPECTF-- *** Testing array_unique() : Passing different arrays to $input argument *** -- Iteration 1 -- array(2) { [0]=> int(1) [1]=> int(2) } -- Iteration 2 -- array(2) { [0]=> float(1.1) [1]=> float(2.2) } -- Iteration 3 -- array(2) { [0]=> bool(false) [1]=> bool(true) } -- Iteration 4 -- array(0) { } -- Iteration 5 -- array(1) { [0]=> NULL } -- Iteration 6 -- array(4) { [0]=> %unicode|string%(3) "a " [1]=> %unicode|string%(5) "aaaa " [2]=> %unicode|string%(1) "b" [4]=> %unicode|string%(27) "\[\]\!\@\#$\%\^\&\*\(\)\{\}" } -- Iteration 7 -- array(4) { [0]=> %unicode|string%(5) "a\v\f" [1]=> %unicode|string%(6) "aaaa\r" [2]=> %unicode|string%(1) "b" [4]=> %unicode|string%(28) "\[\]\!\@\#\$\%\^\&\*\(\)\{\}" } -- Iteration 8 -- array(3) { [%b|u%"h1"]=> %unicode|string%(1) " " [%b|u%"h2"]=> %unicode|string%(88) "hello world The quick brown fox jumped over; the lazy dog This is a double quoted string" [%b|u%"h3"]=> %unicode|string%(88) "hello world 1111 != 2222 heredoc double quoted string. with different white spaces" } -- Iteration 9 -- array(2) { [1]=> %unicode|string%(3) "one" [2]=> %unicode|string%(3) "two" } -- Iteration 10 -- array(2) { [%b|u%"one"]=> int(1) [%b|u%"two"]=> int(2) } -- Iteration 11 -- array(3) { [1]=> int(10) [2]=> int(20) [4]=> int(40) } -- Iteration 12 -- array(2) { [%b|u%"one"]=> %unicode|string%(3) "ten" [%b|u%"two"]=> %unicode|string%(6) "twenty" } -- Iteration 13 -- array(3) { [%b|u%"one"]=> int(1) [2]=> %unicode|string%(3) "two" [4]=> %unicode|string%(4) "four" } -- Iteration 14 -- array(2) { [%b|u%""]=> %unicode|string%(4) "null" [%b|u%"NULL"]=> NULL } -- Iteration 15 -- array(4) { [1]=> %unicode|string%(4) "true" [0]=> %unicode|string%(5) "false" [%b|u%"false"]=> bool(false) [%b|u%"true"]=> bool(true) } -- Iteration 16 -- array(2) { [%b|u%""]=> %unicode|string%(6) "emptys" [%b|u%"emptyd"]=> %unicode|string%(0) "" } -- Iteration 17 -- array(2) { [1]=> %unicode|string%(0) "" [6]=> bool(true) } -- Iteration 18 -- array(3) { [%b|u%""]=> int(4) [0]=> int(5) [1]=> int(6) } Done