--- /dev/null
+--TEST--
+Test unset(), empty() and isset() functions
+--FILE--
+<?php
+/* Prototype: void unset ( mixed $var [, mixed $var [, mixed $...]] );
+ Description: unset() destroys the specified variables
+
+ Prototype: bool empty( mixed $var );
+ Description: Determine whether a variable is considered to be empty
+
+ Prototype: bool isset ( mixed $var [, mixed $var [, $...]] );
+ Description: Returns TRUE if var exists; FALSE otherwise
+*/
+
+echo "*** Testing unset(), empty() & isset() with scalar variables ***\n";
+
+// testing scalar variables
+$scalar_variables = array(
+ 0,
+ 1,
+ +1
+ -1,
+ 0x55,
+ -0xFA,
+ 0123,
+ -0563,
+ 0.0,
+ 1e5,
+ 1E-5,
+ -1.5e5,
+ +5.6,
+ "",
+ '',
+ " ",
+ ' ',
+ "string",
+ "123",
+ "0",
+ "ture",
+ "FALSE",
+ "NULL",
+ "null",
+ true,
+ false,
+ TRUE,
+ FALSE
+);
+
+$loop_counter = 1;
+foreach ($scalar_variables as $scalar_var) {
+ $set_var = 10; // this variable to use with isset
+ echo "-- Iteration $loop_counter --\n"; $loop_counter++;
+
+ // checking with isset before unsetting, expected: bool(true)
+ var_dump( isset($scalar_var) );
+ var_dump( isset($scalar_var, $set_var) );
+ // checking if the var is empty, expected: bool(false) on most
+ // except "", 0, "0", NULL, FALSE
+ var_dump( empty($scalar_var) );
+
+ // destroy the variable using unset
+ unset( $scalar_var );
+ // dump and see if its destroyed, expcted: NULL
+ var_dump( $scalar_var );
+
+ // check using isset to see if unset, expected: bool(false)
+ var_dump( isset($scalar_var) );
+ var_dump( isset($scalar_var, $set_var) );
+
+ // empty to check if empty, expecting bool(true)
+ var_dump( empty($scalar_var) );
+
+ // isset() with two args, one arg only unset, expected: bool(false)
+ var_dump( isset($scalar_var, $set_var) );
+
+ // isset() with two args, both args already unset, expected: bool(false);
+ unset($set_var);
+ var_dump( isset($scalar_var, $set_var) );
+}
+
+echo "\n*** Testing unset(), empty() & isset() with arrays ***\n";
+$array_variables = array(
+ array(),
+ array(NULL),
+ array(0),
+ array("0"),
+ array(""),
+ array(1,2,3,4),
+ array(1.4,2.5,5.6),
+ array(1 => "One", 2 => "two"),
+ array("Name" => "Jack", "Age" => "30"),
+ array(1,2, "One" => "1", 2 => "two", ""=>"empty", "" => '')
+);
+
+$outer_loop_counter = 1;
+foreach ($array_variables as $array_var) {
+ echo "--- Outerloop Iteration $outer_loop_counter ---\n";
+
+ // check the isset and unset on non existing key
+ $var = 1; // a var which is defined
+ // try to unset the element which is non-existent
+ unset($array_var['non_existent']);
+ // check using isset() & empty() on a non_existent element in the array
+ var_dump( isset($array_var['non_existent']) );
+ var_dump( isset($array_var['non_existent'], $var) );
+ var_dump( isset($array_var['non_existent'], $array_var['none']) );
+ var_dump( empty($array_var['non_existent']) );
+
+ // testing empty and isset on arrays
+ var_dump( empty($array_var) ); // expecting bool(false), except: array(), which is considered empty
+ var_dump( isset($array_var) ); // expecting bool(true), except: array(), which is not set
+
+ // get the keys of the $array_var
+ $keys = array_keys($array_var);
+ // unset each element in the array and see the working of unset, isset & empty
+ $inner_loop_counter = 1;
+ foreach ($keys as $key_value) {
+ echo "-- Innerloop Iteration $inner_loop_counter of Outerloop Iteration $outer_loop_counter --\n";
+ $inner_loop_counter++;
+
+ // unset the element
+ unset($array_var[$key_value]);
+ // dump the array after element was unset
+ var_dump($array_var);
+ // check using isset for the element that was unset
+ var_dump( isset($array_var[$key_val]) ); // expected: bool(false)
+ // calling isset with more args
+ var_dump( isset($array_var[$key_val], $array_var) ); //expected: bool(false)
+
+ // calling empty, expected bool(true)
+ var_dump( empty($array_var[$key_val]) );
+
+ // dump the array to see that that array did not get modified
+ // because of using isset, empty and unset on its element
+ var_dump($array_var);
+ }
+
+ $outer_loop_counter++;
+
+ // unset the whole array
+ unset($array_var);
+ // dump the array to see its unset
+ var_dump($array_var);
+ // use isset to see that array is not set
+ var_dump( isset($array_var) ); //expected: bool(false)
+ var_dump( isset($array_var, $array_var[$key_val]) ); // expected: bool(false)
+
+ // empty() to see if the array is empty
+ var_dump( empty($array_var) ); // expected: bool(true)
+}
+
+echo "\n*** Testing unset(), emtpy() & isset() with resource variables ***\n";
+$fp = fopen(__FILE__, "r");
+$dfp = opendir( dirname(__FILE__) );
+$resources = array (
+ $fp,
+ $dfp
+);
+$loop_counter = 1;
+foreach ($resources as $resource) {
+ $temp_var = 10;
+ echo "-- Iteration $loop_counter --\n"; $loop_counter++;
+ //dump the resource first
+ var_dump($resource);
+
+ // check using isset() and empty()
+ var_dump( isset($resource) ); // expected: bool(true)
+ var_dump( empty($resource) ); // expected: bool(false)
+ // call isset() with two args, both set
+ var_dump( isset($resource, $temp_var) ); // expected: bool(true)
+
+ // dump the resource to see using isset() and empty () had no effect on it
+ var_dump($resource);
+
+ // unset the resource
+ unset($resource);
+ // check using isset() and empty()
+ var_dump( isset($resource) ); // expected: bool(flase)
+ var_dump( empty($resource) ); // expected: bool(true)
+ // call isset() with two args, but one set
+ var_dump( isset($resource, $temp_var) ); // expected: bool(false)
+ // uset the temp_var
+ unset($temp_var);
+ // now the isset() with both the args as unset
+ var_dump( isset($resource, $temp_var) ); // expected: bool(false);
+
+ // dump the resource to see if there any effect on it
+ var_dump($resource);
+}
+// unset and dump the array containing all the resources to see that
+// unset works correctly
+unset($resources);
+var_dump($resources);
+var_dump( isset($resources) ); //expected: bool(false)
+var_dump( empty($resources) ); // expected: bool(true)
+
+echo "\n*** Testing unset(), empty() & isset() with objects ***\n";
+class Point
+{
+ var $x;
+ var $y;
+ var $lable;
+
+ function Point($x, $y) {
+ $this->x = $x;
+ $this->y = $y;
+ }
+
+ function setLable($lable) {
+ $this->lable = $lable;
+ }
+ function testPoint() {
+ echo "\nPoint::testPoint() called\n";
+ }
+}
+$point1 = new Point(30,40);
+
+// use unset/empty/isset to check the object
+var_dump($point1); // dump the object
+
+// check the object and member that is not set
+var_dump( isset($point1) ); // expected: bool(true)
+var_dump( empty($point1) ); // expected: bool(false)
+var_dump( isset($point1->$lable) ); //expected: bool(flase)
+var_dump( empty($point1->$lable) ); //expected: bool(true)
+
+//set the member variable lable and check
+$point1->setLable("Point1");
+var_dump( isset($point1->$lable) ); //expected: bool(true)
+var_dump( empty($point1->$lable) ); //expected: bool(false)
+
+// dump the object to see that obj was not harmed
+// because of the usage of the isset & empty
+var_dump($point1);
+
+//unset a member and check
+unset($point1->x);
+// dump the point to see that variable was unset
+var_dump($point1);
+var_dump( isset($point1->x) ); // expected: bool(false)
+var_dump( empty($point1->x) ); // expected: bool(true)
+
+// unset all members and check
+unset($point1->y);
+unset($point1->lable);
+// dump the objec to check that all variables are unset
+var_dump($point1);
+var_dump( isset($point1) ); // expected: bool(ture)
+var_dump( empty($point1) ); // expected: bool(false)
+
+//unset the object and check
+unset($point1);
+var_dump( isset($point1) ); // expected: bool(false)
+var_dump( empty($point1) ); // expected: bool(true)
+// dump to see that object is unset
+var_dump($point1);
+
+// try isset/unset/empty on a member function
+$point2 = new Point(5,6);
+var_dump( isset($point2->testPoint) );
+var_dump( empty($point2->testPoint) );
+unset($point2->testPoint);
+var_dump( isset($point2->testPoint) );
+var_dump( empty($point2->testPoint) );
+
+// use get_class_methods to see effect if any
+var_dump( get_class_methods($point2) );
+// dump the object to see the effect, none expected
+var_dump($point2);
+
+/* testing variation in operation for isset(), empty() & unset().
+Note: Most of the variation for function unset() is testing by a
+ set of testcases named "Zend/tests/unset_cv??.phpt", only
+ variation not tested are attempted here */
+
+echo "\n*** Testing possible variation in operation for isset(), empty() & unset() ***\n";
+/* unset() variation1: checking unset on static variable inside a function.
+ * unset() destroys the variable only in the context of the rest of a function
+ * Following calls will restore the previous value of a variable.
+ */
+echo "\n** Testing unset() variation 1: unset on static variable inside a function **\n";
+function test_unset1() {
+ static $static_var;
+
+ // increment the value of the static. this change is in function context
+ $static_var ++;
+
+ echo "value of static_var before unset: $static_var\n";
+ // check using isset and empty
+ var_dump( isset($static_var) );
+ var_dump( empty($static_var) );
+
+ // unset the static var
+ unset($static_var);
+ echo "value of static_var after unset: $static_var\n";
+ // check using isset and empty
+ var_dump( isset($static_var) );
+ var_dump( empty($static_var) );
+
+ // assign a value to static var
+ $static_var = 20;
+ echo "value of static_var after new assignment: $static_var\n";
+}
+// call the functiont
+test_unset1();
+test_unset1();
+test_unset1();
+
+
+echo "\n** Testing unset() variation 2: unset on a variable passed by ref. inside of a function **\n";
+/* unset() variation2: Pass by reference
+ * If a variable that is PASSED BY REFERENCE is unset() inside of a function,
+ * only the local variable is destroyed. The variable in the calling environment
+ * will retain the same value as before unset() was called.
+ */
+function test_unset2( &$ref_val ) {
+ // unset the variable passed
+ unset($ref_val);
+ // check using isset and empty to confirm
+ var_dump( isset($ref_val) );
+ var_dump( empty($ref_val) );
+
+ // set the value ot a new one
+ $ref_val = "new value by ref";
+}
+
+$value = "value";
+var_dump($value);
+test_unset2($value);
+var_dump($value);
+
+
+echo "\n** Testing unset() variation 3: unset on a global variable inside of a function **\n";
+/* unset() variation2: unset on a global variable inside a function
+ * If a globalized variable is unset() inside of a function, only the
+ * local variable is destroyed. The variable in the calling environment
+ * will retain the same value as before unset() was called.
+ */
+$global_var = 10;
+
+function test_unset3() {
+ global $global_var;
+
+ // check the $global_var using isset and empty
+ var_dump( isset($global_var) );
+ var_dump( empty($global_var) );
+
+ // unset the global var
+ unset($global_var);
+
+ // check the $global_var using isset and empty
+ var_dump( isset($global_var) );
+ var_dump( empty($global_var) );
+}
+
+var_dump($global_var);
+test_unset3();
+var_dump($global_var);
+
+//Note: No error conditions relating to passing arugments can be tested
+// because these are not functions but statements, it will result in syntax error.
+echo "Done\n";
+--EXPECTF--
+*** Testing unset(), empty() & isset() with scalar variables ***
+-- Iteration 1 --
+bool(true)
+bool(true)
+bool(true)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 2 --
+bool(true)
+bool(true)
+bool(false)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 3 --
+bool(true)
+bool(true)
+bool(true)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 4 --
+bool(true)
+bool(true)
+bool(false)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 5 --
+bool(true)
+bool(true)
+bool(false)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 6 --
+bool(true)
+bool(true)
+bool(false)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 7 --
+bool(true)
+bool(true)
+bool(false)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 8 --
+bool(true)
+bool(true)
+bool(true)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 9 --
+bool(true)
+bool(true)
+bool(false)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 10 --
+bool(true)
+bool(true)
+bool(false)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 11 --
+bool(true)
+bool(true)
+bool(false)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 12 --
+bool(true)
+bool(true)
+bool(false)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 13 --
+bool(true)
+bool(true)
+bool(true)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 14 --
+bool(true)
+bool(true)
+bool(true)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 15 --
+bool(true)
+bool(true)
+bool(false)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 16 --
+bool(true)
+bool(true)
+bool(false)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 17 --
+bool(true)
+bool(true)
+bool(false)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 18 --
+bool(true)
+bool(true)
+bool(false)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 19 --
+bool(true)
+bool(true)
+bool(true)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 20 --
+bool(true)
+bool(true)
+bool(false)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 21 --
+bool(true)
+bool(true)
+bool(false)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 22 --
+bool(true)
+bool(true)
+bool(false)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 23 --
+bool(true)
+bool(true)
+bool(false)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 24 --
+bool(true)
+bool(true)
+bool(false)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 25 --
+bool(true)
+bool(true)
+bool(true)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 26 --
+bool(true)
+bool(true)
+bool(false)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+-- Iteration 27 --
+bool(true)
+bool(true)
+bool(true)
+
+Notice: Undefined variable: scalar_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+
+*** Testing unset(), empty() & isset() with arrays ***
+--- Outerloop Iteration 1 ---
+bool(false)
+bool(false)
+bool(false)
+bool(true)
+bool(true)
+bool(true)
+
+Notice: Undefined variable: array_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+--- Outerloop Iteration 2 ---
+bool(false)
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(true)
+-- Innerloop Iteration 1 of Outerloop Iteration 2 --
+array(0) {
+}
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+array(0) {
+}
+
+Notice: Undefined variable: array_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+--- Outerloop Iteration 3 ---
+bool(false)
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(true)
+-- Innerloop Iteration 1 of Outerloop Iteration 3 --
+array(0) {
+}
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+array(0) {
+}
+
+Notice: Undefined variable: array_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+--- Outerloop Iteration 4 ---
+bool(false)
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(true)
+-- Innerloop Iteration 1 of Outerloop Iteration 4 --
+array(0) {
+}
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+array(0) {
+}
+
+Notice: Undefined variable: array_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+--- Outerloop Iteration 5 ---
+bool(false)
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(true)
+-- Innerloop Iteration 1 of Outerloop Iteration 5 --
+array(0) {
+}
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+array(0) {
+}
+
+Notice: Undefined variable: array_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+--- Outerloop Iteration 6 ---
+bool(false)
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(true)
+-- Innerloop Iteration 1 of Outerloop Iteration 6 --
+array(3) {
+ [1]=>
+ int(2)
+ [2]=>
+ int(3)
+ [3]=>
+ int(4)
+}
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+array(3) {
+ [1]=>
+ int(2)
+ [2]=>
+ int(3)
+ [3]=>
+ int(4)
+}
+-- Innerloop Iteration 2 of Outerloop Iteration 6 --
+array(2) {
+ [2]=>
+ int(3)
+ [3]=>
+ int(4)
+}
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+array(2) {
+ [2]=>
+ int(3)
+ [3]=>
+ int(4)
+}
+-- Innerloop Iteration 3 of Outerloop Iteration 6 --
+array(1) {
+ [3]=>
+ int(4)
+}
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+array(1) {
+ [3]=>
+ int(4)
+}
+-- Innerloop Iteration 4 of Outerloop Iteration 6 --
+array(0) {
+}
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+array(0) {
+}
+
+Notice: Undefined variable: array_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+--- Outerloop Iteration 7 ---
+bool(false)
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(true)
+-- Innerloop Iteration 1 of Outerloop Iteration 7 --
+array(2) {
+ [1]=>
+ float(2.5)
+ [2]=>
+ float(5.6)
+}
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+array(2) {
+ [1]=>
+ float(2.5)
+ [2]=>
+ float(5.6)
+}
+-- Innerloop Iteration 2 of Outerloop Iteration 7 --
+array(1) {
+ [2]=>
+ float(5.6)
+}
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+array(1) {
+ [2]=>
+ float(5.6)
+}
+-- Innerloop Iteration 3 of Outerloop Iteration 7 --
+array(0) {
+}
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+array(0) {
+}
+
+Notice: Undefined variable: array_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+--- Outerloop Iteration 8 ---
+bool(false)
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(true)
+-- Innerloop Iteration 1 of Outerloop Iteration 8 --
+array(1) {
+ [2]=>
+ string(3) "two"
+}
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+array(1) {
+ [2]=>
+ string(3) "two"
+}
+-- Innerloop Iteration 2 of Outerloop Iteration 8 --
+array(0) {
+}
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+array(0) {
+}
+
+Notice: Undefined variable: array_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+--- Outerloop Iteration 9 ---
+bool(false)
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(true)
+-- Innerloop Iteration 1 of Outerloop Iteration 9 --
+array(1) {
+ ["Age"]=>
+ string(2) "30"
+}
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+array(1) {
+ ["Age"]=>
+ string(2) "30"
+}
+-- Innerloop Iteration 2 of Outerloop Iteration 9 --
+array(0) {
+}
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+array(0) {
+}
+
+Notice: Undefined variable: array_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+--- Outerloop Iteration 10 ---
+bool(false)
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(true)
+-- Innerloop Iteration 1 of Outerloop Iteration 10 --
+array(4) {
+ [1]=>
+ int(2)
+ ["One"]=>
+ string(1) "1"
+ [2]=>
+ string(3) "two"
+ [""]=>
+ string(0) ""
+}
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+array(4) {
+ [1]=>
+ int(2)
+ ["One"]=>
+ string(1) "1"
+ [2]=>
+ string(3) "two"
+ [""]=>
+ string(0) ""
+}
+-- Innerloop Iteration 2 of Outerloop Iteration 10 --
+array(3) {
+ ["One"]=>
+ string(1) "1"
+ [2]=>
+ string(3) "two"
+ [""]=>
+ string(0) ""
+}
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+array(3) {
+ ["One"]=>
+ string(1) "1"
+ [2]=>
+ string(3) "two"
+ [""]=>
+ string(0) ""
+}
+-- Innerloop Iteration 3 of Outerloop Iteration 10 --
+array(2) {
+ [2]=>
+ string(3) "two"
+ [""]=>
+ string(0) ""
+}
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+array(2) {
+ [2]=>
+ string(3) "two"
+ [""]=>
+ string(0) ""
+}
+-- Innerloop Iteration 4 of Outerloop Iteration 10 --
+array(1) {
+ [""]=>
+ string(0) ""
+}
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+array(1) {
+ [""]=>
+ string(0) ""
+}
+-- Innerloop Iteration 5 of Outerloop Iteration 10 --
+array(0) {
+}
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(false)
+
+Notice: Undefined variable: key_val in %s on line %d
+bool(true)
+array(0) {
+}
+
+Notice: Undefined variable: array_var in %s on line %d
+NULL
+bool(false)
+bool(false)
+bool(true)
+
+*** Testing unset(), emtpy() & isset() with resource variables ***
+-- Iteration 1 --
+resource(5) of type (stream)
+bool(true)
+bool(false)
+bool(true)
+resource(5) of type (stream)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+
+Notice: Undefined variable: resource in %s on line %d
+NULL
+-- Iteration 2 --
+resource(6) of type (stream)
+bool(true)
+bool(false)
+bool(true)
+resource(6) of type (stream)
+bool(false)
+bool(true)
+bool(false)
+bool(false)
+
+Notice: Undefined variable: resource in %s on line %d
+NULL
+
+Notice: Undefined variable: resources in %s on line %d
+NULL
+bool(false)
+bool(true)
+
+*** Testing unset(), empty() & isset() with objects ***
+object(Point)#1 (3) {
+ ["x"]=>
+ int(30)
+ ["y"]=>
+ int(40)
+ ["lable"]=>
+ NULL
+}
+bool(true)
+bool(false)
+
+Notice: Undefined variable: lable in %s on line %d
+bool(false)
+
+Notice: Undefined variable: lable in %s on line %d
+bool(true)
+
+Notice: Undefined variable: lable in %s on line %d
+bool(false)
+
+Notice: Undefined variable: lable in %s on line %d
+bool(true)
+object(Point)#1 (3) {
+ ["x"]=>
+ int(30)
+ ["y"]=>
+ int(40)
+ ["lable"]=>
+ string(6) "Point1"
+}
+object(Point)#1 (2) {
+ ["y"]=>
+ int(40)
+ ["lable"]=>
+ string(6) "Point1"
+}
+bool(false)
+bool(true)
+object(Point)#1 (0) {
+}
+bool(true)
+bool(false)
+bool(false)
+bool(true)
+
+Notice: Undefined variable: point1 in %s on line %d
+NULL
+bool(false)
+bool(true)
+bool(false)
+bool(true)
+array(3) {
+ [0]=>
+ string(5) "Point"
+ [1]=>
+ string(8) "setLable"
+ [2]=>
+ string(9) "testPoint"
+}
+object(Point)#1 (3) {
+ ["x"]=>
+ int(5)
+ ["y"]=>
+ int(6)
+ ["lable"]=>
+ NULL
+}
+
+*** Testing possible variation in operation for isset(), empty() & unset() ***
+
+** Testing unset() variation 1: unset on static variable inside a function **
+value of static_var before unset: 1
+bool(true)
+bool(false)
+
+Notice: Undefined variable: static_var in %s on line %d
+value of static_var after unset:
+bool(false)
+bool(true)
+value of static_var after new assignment: 20
+value of static_var before unset: 2
+bool(true)
+bool(false)
+
+Notice: Undefined variable: static_var in %s on line %d
+value of static_var after unset:
+bool(false)
+bool(true)
+value of static_var after new assignment: 20
+value of static_var before unset: 3
+bool(true)
+bool(false)
+
+Notice: Undefined variable: static_var in %s on line %d
+value of static_var after unset:
+bool(false)
+bool(true)
+value of static_var after new assignment: 20
+
+** Testing unset() variation 2: unset on a variable passed by ref. inside of a function **
+string(5) "value"
+bool(false)
+bool(true)
+string(5) "value"
+
+** Testing unset() variation 3: unset on a global variable inside of a function **
+int(10)
+bool(true)
+bool(false)
+bool(false)
+bool(true)
+int(10)
+Done
projects / php / commitdiff