--- /dev/null
+--TEST--
+Test array_keys() function (error conditions)
+--FILE--
+<?php
+
+echo "\n*** Testing error conditions ***";
+var_dump(array_keys(100));
+var_dump(array_keys("string"));
+var_dump(array_keys(new stdclass)); // object
+var_dump(array_keys()); // Zero arguments
+var_dump(array_keys(array(), "", TRUE, 100)); // args > expected
+var_dump(array_keys(array(1,2,3, array() => array()))); // (W)illegal offset
+
+echo "Done\n";
+?>
+--EXPECTF--
+*** Testing error conditions ***
+Warning: array_keys(): The first argument should be an array in %s on line %d
+NULL
+
+Warning: array_keys(): The first argument should be an array in %s on line %d
+NULL
+
+Warning: array_keys(): The first argument should be an array in %s on line %d
+NULL
+
+Warning: Wrong parameter count for array_keys() in %s on line %d
+NULL
+
+Warning: Wrong parameter count for array_keys() in %s on line %d
+NULL
+
+Warning: Illegal offset type in %s on line %d
+array(3) {
+ [0]=>
+ int(0)
+ [1]=>
+ int(1)
+ [2]=>
+ int(2)
+}
+Done
--- /dev/null
+--TEST--
+Test array_keys() function (variation - 1)
+--FILE--
+<?php
+
+echo "\n*** Testing array_keys() on various arrays ***";
+$arrays = array(
+ array(),
+ array(0),
+ array( array() ),
+ array("Hello" => "World"),
+ array("" => ""),
+ array(1,2,3, "d" => array(4,6, "d")),
+ array("a" => 1, "b" => 2, "c" =>3, "d" => array()),
+ array(0 => 0, 1 => 1, 2 => 2, 3 => 3),
+ array(0.001=>3.000, 1.002=>2, 1.999=>3, "a"=>3, 3=>5, "5"=>3.000),
+ array(TRUE => TRUE, FALSE => FALSE, NULL => NULL, "\x000", "\000"),
+ array("a" => "abcd", "a" => "", "ab" => -6, "cd" => -0.5 ),
+ array(0 => array(), 1=> array(0), 2 => array(1), ""=> array(),""=>"" )
+);
+
+$i = 0;
+/* loop through to test array_keys() with different arrays */
+foreach ($arrays as $array) {
+ echo "\n-- Iteration $i --\n";
+ var_dump(array_keys($array));
+ $i++;
+}
+
+echo "Done\n";
+?>
+--EXPECTF--
+*** Testing array_keys() on various arrays ***
+-- Iteration 0 --
+array(0) {
+}
+
+-- Iteration 1 --
+array(1) {
+ [0]=>
+ int(0)
+}
+
+-- Iteration 2 --
+array(1) {
+ [0]=>
+ int(0)
+}
+
+-- Iteration 3 --
+array(1) {
+ [0]=>
+ string(5) "Hello"
+}
+
+-- Iteration 4 --
+array(1) {
+ [0]=>
+ string(0) ""
+}
+
+-- Iteration 5 --
+array(4) {
+ [0]=>
+ int(0)
+ [1]=>
+ int(1)
+ [2]=>
+ int(2)
+ [3]=>
+ string(1) "d"
+}
+
+-- Iteration 6 --
+array(4) {
+ [0]=>
+ string(1) "a"
+ [1]=>
+ string(1) "b"
+ [2]=>
+ string(1) "c"
+ [3]=>
+ string(1) "d"
+}
+
+-- Iteration 7 --
+array(4) {
+ [0]=>
+ int(0)
+ [1]=>
+ int(1)
+ [2]=>
+ int(2)
+ [3]=>
+ int(3)
+}
+
+-- Iteration 8 --
+array(5) {
+ [0]=>
+ int(0)
+ [1]=>
+ int(1)
+ [2]=>
+ string(1) "a"
+ [3]=>
+ int(3)
+ [4]=>
+ int(5)
+}
+
+-- Iteration 9 --
+array(5) {
+ [0]=>
+ int(1)
+ [1]=>
+ int(0)
+ [2]=>
+ string(0) ""
+ [3]=>
+ int(2)
+ [4]=>
+ int(3)
+}
+
+-- Iteration 10 --
+array(3) {
+ [0]=>
+ string(1) "a"
+ [1]=>
+ string(2) "ab"
+ [2]=>
+ string(2) "cd"
+}
+
+-- Iteration 11 --
+array(4) {
+ [0]=>
+ int(0)
+ [1]=>
+ int(1)
+ [2]=>
+ int(2)
+ [3]=>
+ string(0) ""
+}
+Done
--- /dev/null
+--TEST--
+Test array_keys() function (variation - 2)
+--SKIPIF--
+<?php
+if (PHP_INT_SIZE != 4) die("skip this test is for 32bit platform only");
+?>
+--FILE--
+<?php
+
+echo "\n*** Testing array_keys() on range of values ***\n";
+$arr_range = array(
+ 2147483647 => 1,
+ 2147483648 => 2,
+ -2147483647 => 3,
+ -2147483648 => 4,
+ -2147483649 => 5,
+ -0 => 6,
+ 0 => 7
+);
+var_dump(array_keys($arr_range));
+
+echo "\n*** Testing array_keys() on an array created on the fly ***\n";
+var_dump(array_keys(array("a" => 1, "b" => 2, "c" => 3)));
+var_dump(array_keys(array())); // null array
+
+echo "Done\n";
+?>
+--EXPECTF--
+*** Testing array_keys() on range of values ***
+array(4) {
+ [0]=>
+ int(2147483647)
+ [1]=>
+ int(-2147483648)
+ [2]=>
+ int(-2147483647)
+ [3]=>
+ int(0)
+}
+
+*** Testing array_keys() on an array created on the fly ***
+array(3) {
+ [0]=>
+ string(1) "a"
+ [1]=>
+ string(1) "b"
+ [2]=>
+ string(1) "c"
+}
+array(0) {
+}
+Done
--- /dev/null
+--TEST--
+Test array_keys() function (variation - 2)
+--SKIPIF--
+<?php
+if (PHP_INT_SIZE != 8) die("skip this test is for 64bit platform only");
+?>
+--FILE--
+<?php
+
+echo "\n*** Testing array_keys() on range of values ***\n";
+$arr_range = array(
+ 2147483647 => 1,
+ 2147483648 => 2,
+ -2147483647 => 3,
+ -2147483648 => 4,
+ -2147483649 => 5,
+ -0 => 6,
+ 0 => 7
+);
+var_dump(array_keys($arr_range));
+
+echo "\n*** Testing array_keys() on an array created on the fly ***\n";
+var_dump(array_keys(array("a" => 1, "b" => 2, "c" => 3)));
+var_dump(array_keys(array())); // null array
+
+echo "Done\n";
+?>
+--EXPECTF--
+*** Testing array_keys() on range of values ***
+array(6) {
+ [0]=>
+ int(2147483647)
+ [1]=>
+ int(2147483648)
+ [2]=>
+ int(-2147483647)
+ [3]=>
+ int(-2147483648)
+ [4]=>
+ int(-2147483649)
+ [5]=>
+ int(0)
+}
+
+*** Testing array_keys() on an array created on the fly ***
+array(3) {
+ [0]=>
+ string(1) "a"
+ [1]=>
+ string(1) "b"
+ [2]=>
+ string(1) "c"
+}
+array(0) {
+}
+Done
--- /dev/null
+--TEST--
+Test array_keys() function (variation - 3)
+--FILE--
+<?php
+
+echo "*** Testing array_keys() on all the types other than arrays ***\n";
+$types_arr = array(
+ TRUE => TRUE,
+ FALSE => FALSE,
+ 1 => 1,
+ 0 => 0,
+ -1 => -1,
+ "1" => "1",
+ "0" => "0",
+ "-1" => "-1",
+ NULL,
+ array(),
+ "php" => "php",
+ "" => ""
+);
+$values = array(TRUE, FALSE, 1, 0, -1, "1", "0", "-1", NULL, array(), "php", "");
+foreach ($values as $value){
+ var_dump(array_keys($types_arr, $value));
+}
+
+echo "Done\n";
+?>
+--EXPECTF--
+*** Testing array_keys() on all the types other than arrays ***
+array(3) {
+ [0]=>
+ int(1)
+ [1]=>
+ int(-1)
+ [2]=>
+ string(3) "php"
+}
+array(4) {
+ [0]=>
+ int(0)
+ [1]=>
+ int(2)
+ [2]=>
+ int(3)
+ [3]=>
+ string(0) ""
+}
+array(1) {
+ [0]=>
+ int(1)
+}
+array(4) {
+ [0]=>
+ int(0)
+ [1]=>
+ int(2)
+ [2]=>
+ string(3) "php"
+ [3]=>
+ string(0) ""
+}
+array(1) {
+ [0]=>
+ int(-1)
+}
+array(1) {
+ [0]=>
+ int(1)
+}
+array(1) {
+ [0]=>
+ int(0)
+}
+array(1) {
+ [0]=>
+ int(-1)
+}
+array(3) {
+ [0]=>
+ int(2)
+ [1]=>
+ int(3)
+ [2]=>
+ string(0) ""
+}
+array(2) {
+ [0]=>
+ int(2)
+ [1]=>
+ int(3)
+}
+array(1) {
+ [0]=>
+ string(3) "php"
+}
+array(2) {
+ [0]=>
+ int(2)
+ [1]=>
+ string(0) ""
+}
+Done
--- /dev/null
+--TEST--
+Test array_keys() function (variation - 4)
+--FILE--
+<?php
+
+echo "*** Testing array_keys() on all the types other than arrays ***\n";
+$types_arr = array(
+ TRUE => TRUE,
+ FALSE => FALSE,
+ 1 => 1,
+ 0 => 0,
+ -1 => -1,
+ "1" => "1",
+ "0" => "0",
+ "-1" => "-1",
+ NULL,
+ array(),
+ "php" => "php",
+ "" => ""
+);
+$values = array(TRUE, FALSE, 1, 0, -1, "1", "0", "-1", NULL, array(), "php", "");
+foreach ($values as $value){
+ var_dump(array_keys($types_arr, $value, TRUE));
+}
+
+echo "Done\n";
+?>
+--EXPECTF--
+*** Testing array_keys() on all the types other than arrays ***
+array(0) {
+}
+array(0) {
+}
+array(0) {
+}
+array(0) {
+}
+array(0) {
+}
+array(1) {
+ [0]=>
+ int(1)
+}
+array(1) {
+ [0]=>
+ int(0)
+}
+array(1) {
+ [0]=>
+ int(-1)
+}
+array(1) {
+ [0]=>
+ int(2)
+}
+array(1) {
+ [0]=>
+ int(3)
+}
+array(1) {
+ [0]=>
+ string(3) "php"
+}
+array(1) {
+ [0]=>
+ string(0) ""
+}
+Done
--- /dev/null
+--TEST--
+Test array_keys() function (variation - 5)
+--FILE--
+<?php
+
+echo "\n*** Testing array_keys() with resource type ***\n";
+$resource1 = fopen( __FILE__, "r");
+$resource2 = opendir( "." );
+
+/* creating an array with resource types as elements */
+$arr_resource = array($resource1, $resource2);
+
+var_dump(array_keys($arr_resource, $resource1)); // loose type checking
+var_dump(array_keys($arr_resource, $resource1, TRUE)); // strict type checking
+var_dump(array_keys($arr_resource, $resource2)); // loose type checking
+var_dump(array_keys($arr_resource, $resource2, TRUE)); // strict type checking
+
+/* Closing the resource handles */
+fclose( $resource1 );
+closedir( $resource2 );
+
+?>
+--EXPECTF--
+*** Testing array_keys() with resource type ***
+array(1) {
+ [0]=>
+ int(0)
+}
+array(1) {
+ [0]=>
+ int(0)
+}
+array(1) {
+ [0]=>
+ int(1)
+}
+array(1) {
+ [0]=>
+ int(1)
+}