--- /dev/null
+--TEST--
+Test key(), current(), next() & reset() functions
+--FILE--
+<?php
+/* Prototype & Usage:
+ mixed key ( array &$array ) -> returns the index element of the current array position
+ mixed current ( array &$array ) -> returns the current element in the array
+ mixed next ( array &$array ) -> similar to current() but advances the internal pointer to next element
+ mixed reset ( array &$array ) -> Reset the internal pointer to first element
+*/
+
+$basic_arrays = array (
+ array(0), // array with element as 0
+ array(1), // array with single element
+ array(1,2, 3, -1, -2, -3), // array of integers
+ array(1.1, 2.2, 3.3, -1.1, -2.2, -3.3), // array of floats
+ array('a', 'b', 'c', "ab", "ac", "ad"), // string array
+ array("a" => "apple", "b" => "book", "c" => "cook"), // associative array
+ array('d' => 'drink', 'p' => 'port', 's' => 'set'), // another associative array
+ array(1 => 'One', 2 => 'two', 3 => "three") // associative array with key as integers
+);
+
+$varient_arrays = array (
+ array(), // empty array
+ array(""), // array with null string
+ array(NULL),// array with NULL
+ array(null),// array with null
+ array(NULL, true, null, "", 1), // mixed array
+ array(-1.5 => "test", -2 => "rest", 2.5 => "two",
+ "" => "string", 0 => "zero", "" => "" ) // mixed array
+);
+
+echo "*** Testing basic operations ***\n";
+$loop_count = 1;
+foreach ($basic_arrays as $sub_array ) {
+ echo "-- Iteration $loop_count --\n";
+ $loop_count++;
+ $c = count ($sub_array);
+ $c++; // increment by one to create the situation of accessing beyond array size
+ while ( $c ) {
+ var_dump( current($sub_array)); // current element
+ var_dump( key($sub_array) ); // key of the current element
+ var_dump( next($sub_array) ); // move to next element
+ $c --;
+ }
+ var_dump( reset($sub_array) ); // reset the internal pointer to first element
+ var_dump( key($sub_array) ); // access the array after reset
+ var_dump( $sub_array ); // dump the array to see that its intact
+
+ echo "\n";
+}
+
+echo "\n*** Testing possible variations ***\n";
+$loop_count = 1;
+foreach ($varient_arrays as $sub_array ) {
+ echo "-- Iteration $loop_count --\n";
+ $loop_count++;
+ $c = count ($sub_array);
+ $c++; // increment by one to create the situation of accessing beyond array size
+ while ( $c ) {
+ var_dump( current($sub_array)); // current element
+ var_dump( key($sub_array) ); // key of the current element
+ var_dump( next($sub_array) ); // move to next element
+ $c --;
+ }
+ var_dump( reset($sub_array) ); // reset the internal pointer to first element
+ var_dump( key($sub_array) ); // access the array after reset
+ var_dump( $sub_array ); // dump the array to see that its intact
+ echo "\n";
+}
+
+/*test these functions on array which is already unset */
+echo "\n-- Testing variation: when array is unset --\n";
+$unset_array = array (1);
+unset($unset_array);
+
+var_dump( current($unset_array) );
+var_dump( key($unset_array) );
+var_dump( next($unset_array) );
+var_dump( reset($unset_array) );
+
+
+echo "\n*** Testing error conditions ***\n";
+//Zero argument, expected 1 argument
+var_dump( key() );
+var_dump( current() );
+var_dump( reset() );
+var_dump( next() );
+
+// args more than expected, expected 1 argument
+$temp_array = array(1);
+var_dump( key($temp_array, $temp_array) );
+var_dump( current($temp_array, $temp_array) );
+var_dump( reset($temp_array, $temp_array) );
+var_dump( next($temp_array, $temp_array) );
+
+// invalid args type, valid arguement: array
+$int_var = 1;
+$float_var = 1.5;
+$string = "string";
+var_dump( key($int_var) );
+var_dump( key($float_var) );
+var_dump( key($string) );
+
+var_dump( current($int_var) );
+var_dump( current($float_var) );
+var_dump( current($string) );
+
+var_dump( next($int_var) );
+var_dump( next($float_var) );
+var_dump( next($string) );
+
+var_dump( reset($int_var) );
+var_dump( reset($float_var) );
+var_dump( reset($string) );
+
+echo "\n*** Testing operation on Objects ***\n";
+// class having members of different scope
+class test_class
+{
+ private $private_var = "private_var";
+ public $public_var = "public_var";
+ protected $protected_var = "protected_var";
+ private $var1 = 10;
+ public $var2 = 30;
+ protected $var3 = 40;
+ var $integer = 3092;
+
+ private function private_fun() {
+ echo "private_fun() called\n";
+ }
+
+ protected function protected_fun() {
+ echo "protected_fun() called\n";
+ }
+
+ public function public_fun() {
+ echo "public_fun() called\n";
+ }
+}
+// class with no member variables
+class zero_member_var_class
+{
+ public function fun() {
+ echo "fun() called\n";
+ }
+}
+// class with no members
+class zero_member_class
+{
+ // no members
+}
+
+//create object of all classes defined above
+$test_class_obj = new test_class();
+$zero_member_var_class_obj = new zero_member_var_class();
+$zero_member_class_obj = new zero_member_class();
+
+$object_array = array (
+ $test_class_obj,
+ $zero_member_var_class_obj,
+ $zero_member_class_obj
+);
+
+/* loop to use function key(), current(), next() and reset()
+ on different class objects */
+$loop_count = 1;
+foreach( $object_array as $object ) {
+ echo "--- Outerloop Iteration $loop_count ---\n";
+
+ /* dump the object before performing operation on it */
+ echo "Object before performing operations ...\n";
+ var_dump($object) ;
+
+ /* loop to feach all the key/value pair from the object*/
+ $inner_loop_count = 1;
+ do {
+ echo "-- Innerloop iteration $inner_loop_count of Outerloop Iteration $loop_count --\n";
+ $inner_loop_count ++;
+
+ // print the key/value pair of the current value
+ echo "current => "; var_dump( current($object) ); // key & value pair
+ echo "key => "; var_dump( key($object) ); // key
+
+ $next_pair = next($object);
+ echo "next => "; var_dump($next_pair);
+
+ } while( FALSE != $next_pair );
+
+ $loop_count++;
+
+ /* reset the object */
+ echo "reset => "; var_dump( reset($object) );
+ echo "current => "; var_dump( current($object) ); // first variable in object
+
+ echo "\nObject after performing operations ...\n";
+ var_dump($object) ; // no change expected
+}
+
+echo "Done\n";
+?>
+--EXPECTF--
+*** Testing basic operations ***
+-- Iteration 1 --
+int(0)
+int(0)
+bool(false)
+bool(false)
+NULL
+bool(false)
+int(0)
+int(0)
+array(1) {
+ [0]=>
+ int(0)
+}
+
+-- Iteration 2 --
+int(1)
+int(0)
+bool(false)
+bool(false)
+NULL
+bool(false)
+int(1)
+int(0)
+array(1) {
+ [0]=>
+ int(1)
+}
+
+-- Iteration 3 --
+int(1)
+int(0)
+int(2)
+int(2)
+int(1)
+int(3)
+int(3)
+int(2)
+int(-1)
+int(-1)
+int(3)
+int(-2)
+int(-2)
+int(4)
+int(-3)
+int(-3)
+int(5)
+bool(false)
+bool(false)
+NULL
+bool(false)
+int(1)
+int(0)
+array(6) {
+ [0]=>
+ int(1)
+ [1]=>
+ int(2)
+ [2]=>
+ int(3)
+ [3]=>
+ int(-1)
+ [4]=>
+ int(-2)
+ [5]=>
+ int(-3)
+}
+
+-- Iteration 4 --
+float(1.1)
+int(0)
+float(2.2)
+float(2.2)
+int(1)
+float(3.3)
+float(3.3)
+int(2)
+float(-1.1)
+float(-1.1)
+int(3)
+float(-2.2)
+float(-2.2)
+int(4)
+float(-3.3)
+float(-3.3)
+int(5)
+bool(false)
+bool(false)
+NULL
+bool(false)
+float(1.1)
+int(0)
+array(6) {
+ [0]=>
+ float(1.1)
+ [1]=>
+ float(2.2)
+ [2]=>
+ float(3.3)
+ [3]=>
+ float(-1.1)
+ [4]=>
+ float(-2.2)
+ [5]=>
+ float(-3.3)
+}
+
+-- Iteration 5 --
+string(1) "a"
+int(0)
+string(1) "b"
+string(1) "b"
+int(1)
+string(1) "c"
+string(1) "c"
+int(2)
+string(2) "ab"
+string(2) "ab"
+int(3)
+string(2) "ac"
+string(2) "ac"
+int(4)
+string(2) "ad"
+string(2) "ad"
+int(5)
+bool(false)
+bool(false)
+NULL
+bool(false)
+string(1) "a"
+int(0)
+array(6) {
+ [0]=>
+ string(1) "a"
+ [1]=>
+ string(1) "b"
+ [2]=>
+ string(1) "c"
+ [3]=>
+ string(2) "ab"
+ [4]=>
+ string(2) "ac"
+ [5]=>
+ string(2) "ad"
+}
+
+-- Iteration 6 --
+string(5) "apple"
+string(1) "a"
+string(4) "book"
+string(4) "book"
+string(1) "b"
+string(4) "cook"
+string(4) "cook"
+string(1) "c"
+bool(false)
+bool(false)
+NULL
+bool(false)
+string(5) "apple"
+string(1) "a"
+array(3) {
+ ["a"]=>
+ string(5) "apple"
+ ["b"]=>
+ string(4) "book"
+ ["c"]=>
+ string(4) "cook"
+}
+
+-- Iteration 7 --
+string(5) "drink"
+string(1) "d"
+string(4) "port"
+string(4) "port"
+string(1) "p"
+string(3) "set"
+string(3) "set"
+string(1) "s"
+bool(false)
+bool(false)
+NULL
+bool(false)
+string(5) "drink"
+string(1) "d"
+array(3) {
+ ["d"]=>
+ string(5) "drink"
+ ["p"]=>
+ string(4) "port"
+ ["s"]=>
+ string(3) "set"
+}
+
+-- Iteration 8 --
+string(3) "One"
+int(1)
+string(3) "two"
+string(3) "two"
+int(2)
+string(5) "three"
+string(5) "three"
+int(3)
+bool(false)
+bool(false)
+NULL
+bool(false)
+string(3) "One"
+int(1)
+array(3) {
+ [1]=>
+ string(3) "One"
+ [2]=>
+ string(3) "two"
+ [3]=>
+ string(5) "three"
+}
+
+
+*** Testing possible variations ***
+-- Iteration 1 --
+bool(false)
+NULL
+bool(false)
+bool(false)
+NULL
+array(0) {
+}
+
+-- Iteration 2 --
+string(0) ""
+int(0)
+bool(false)
+bool(false)
+NULL
+bool(false)
+string(0) ""
+int(0)
+array(1) {
+ [0]=>
+ string(0) ""
+}
+
+-- Iteration 3 --
+NULL
+int(0)
+bool(false)
+bool(false)
+NULL
+bool(false)
+NULL
+int(0)
+array(1) {
+ [0]=>
+ NULL
+}
+
+-- Iteration 4 --
+NULL
+int(0)
+bool(false)
+bool(false)
+NULL
+bool(false)
+NULL
+int(0)
+array(1) {
+ [0]=>
+ NULL
+}
+
+-- Iteration 5 --
+NULL
+int(0)
+bool(true)
+bool(true)
+int(1)
+NULL
+NULL
+int(2)
+string(0) ""
+string(0) ""
+int(3)
+int(1)
+int(1)
+int(4)
+bool(false)
+bool(false)
+NULL
+bool(false)
+NULL
+int(0)
+array(5) {
+ [0]=>
+ NULL
+ [1]=>
+ bool(true)
+ [2]=>
+ NULL
+ [3]=>
+ string(0) ""
+ [4]=>
+ int(1)
+}
+
+-- Iteration 6 --
+string(4) "test"
+int(-1)
+string(4) "rest"
+string(4) "rest"
+int(-2)
+string(3) "two"
+string(3) "two"
+int(2)
+string(0) ""
+string(0) ""
+string(0) ""
+string(4) "zero"
+string(4) "zero"
+int(0)
+bool(false)
+bool(false)
+NULL
+bool(false)
+string(4) "test"
+int(-1)
+array(5) {
+ [-1]=>
+ string(4) "test"
+ [-2]=>
+ string(4) "rest"
+ [2]=>
+ string(3) "two"
+ [""]=>
+ string(0) ""
+ [0]=>
+ string(4) "zero"
+}
+
+
+-- Testing variation: when array is unset --
+
+Warning: current(): Passed variable is not an array or object in %s on line %d
+bool(false)
+
+Warning: key(): Passed variable is not an array or object in %s on line %d
+bool(false)
+
+Warning: next(): Passed variable is not an array or object in %s on line %d
+bool(false)
+
+Warning: reset(): Passed variable is not an array or object in %s on line %d
+bool(false)
+
+*** Testing error conditions ***
+
+Warning: Wrong parameter count for key() in %s on line %d
+NULL
+
+Warning: Wrong parameter count for current() in %s on line %d
+NULL
+
+Warning: Wrong parameter count for reset() in %s on line %d
+NULL
+
+Warning: Wrong parameter count for next() in %s on line %d
+NULL
+
+Warning: Wrong parameter count for key() in %s on line %d
+NULL
+
+Warning: Wrong parameter count for current() in %s on line %d
+NULL
+
+Warning: Wrong parameter count for reset() in %s on line %d
+NULL
+
+Warning: Wrong parameter count for next() in %s on line %d
+NULL
+
+Warning: key(): Passed variable is not an array or object in %s on line %d
+bool(false)
+
+Warning: key(): Passed variable is not an array or object in %s on line %d
+bool(false)
+
+Warning: key(): Passed variable is not an array or object in %s on line %d
+bool(false)
+
+Warning: current(): Passed variable is not an array or object in %s on line %d
+bool(false)
+
+Warning: current(): Passed variable is not an array or object in %s on line %d
+bool(false)
+
+Warning: current(): Passed variable is not an array or object in %s on line %d
+bool(false)
+
+Warning: next(): Passed variable is not an array or object in %s on line %d
+bool(false)
+
+Warning: next(): Passed variable is not an array or object in %s on line %d
+bool(false)
+
+Warning: next(): Passed variable is not an array or object in %s on line %d
+bool(false)
+
+Warning: reset(): Passed variable is not an array or object in %s on line %d
+bool(false)
+
+Warning: reset(): Passed variable is not an array or object in %s on line %d
+bool(false)
+
+Warning: reset(): Passed variable is not an array or object in %s on line %d
+bool(false)
+
+*** Testing operation on Objects ***
+--- Outerloop Iteration 1 ---
+Object before performing operations ...
+object(test_class)#1 (7) {
+ ["private_var:private"]=>
+ string(11) "private_var"
+ ["public_var"]=>
+ string(10) "public_var"
+ ["protected_var:protected"]=>
+ string(13) "protected_var"
+ ["var1:private"]=>
+ int(10)
+ ["var2"]=>
+ int(30)
+ ["var3:protected"]=>
+ int(40)
+ ["integer"]=>
+ int(3092)
+}
+-- Innerloop iteration 1 of Outerloop Iteration 1 --
+current => string(11) "private_var"
+key => string(23) "\0test_class\0private_var"
+next => string(10) "public_var"
+-- Innerloop iteration 2 of Outerloop Iteration 1 --
+current => string(10) "public_var"
+key => string(10) "public_var"
+next => string(13) "protected_var"
+-- Innerloop iteration 3 of Outerloop Iteration 1 --
+current => string(13) "protected_var"
+key => string(16) "\0*\0protected_var"
+next => int(10)
+-- Innerloop iteration 4 of Outerloop Iteration 1 --
+current => int(10)
+key => string(16) "\0test_class\0var1"
+next => int(30)
+-- Innerloop iteration 5 of Outerloop Iteration 1 --
+current => int(30)
+key => string(4) "var2"
+next => int(40)
+-- Innerloop iteration 6 of Outerloop Iteration 1 --
+current => int(40)
+key => string(7) "\0*\0var3"
+next => int(3092)
+-- Innerloop iteration 7 of Outerloop Iteration 1 --
+current => int(3092)
+key => string(7) "integer"
+next => bool(false)
+reset => string(11) "private_var"
+current => string(11) "private_var"
+
+Object after performing operations ...
+object(test_class)#1 (7) {
+ ["private_var:private"]=>
+ string(11) "private_var"
+ ["public_var"]=>
+ string(10) "public_var"
+ ["protected_var:protected"]=>
+ string(13) "protected_var"
+ ["var1:private"]=>
+ int(10)
+ ["var2"]=>
+ int(30)
+ ["var3:protected"]=>
+ int(40)
+ ["integer"]=>
+ int(3092)
+}
+--- Outerloop Iteration 2 ---
+Object before performing operations ...
+object(zero_member_var_class)#2 (0) {
+}
+-- Innerloop iteration 1 of Outerloop Iteration 2 --
+current => bool(false)
+key => NULL
+next => bool(false)
+reset => bool(false)
+current => bool(false)
+
+Object after performing operations ...
+object(zero_member_var_class)#2 (0) {
+}
+--- Outerloop Iteration 3 ---
+Object before performing operations ...
+object(zero_member_class)#3 (0) {
+}
+-- Innerloop iteration 1 of Outerloop Iteration 3 --
+current => bool(false)
+key => NULL
+next => bool(false)
+reset => bool(false)
+current => bool(false)
+
+Object after performing operations ...
+object(zero_member_class)#3 (0) {
+}
+Done
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