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@ -60,7 +60,7 @@ foreach ($scalar_variables as $scalar_var) { |
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// destroy the variable using unset |
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unset( $scalar_var ); |
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// dump and see if its destroyed, expcted: NULL |
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// dump and see if its destroyed, expcted: NULL |
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var_dump( $scalar_var ); |
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// check using isset to see if unset, expected: bool(false) |
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@ -106,11 +106,11 @@ foreach ($array_variables as $array_var) { |
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var_dump( isset($array_var['non_existent'], $array_var['none']) ); |
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var_dump( empty($array_var['non_existent']) ); |
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// testing empty and isset on arrays |
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// testing empty and isset on arrays |
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var_dump( empty($array_var) ); // expecting bool(false), except: array(), which is considered empty |
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var_dump( isset($array_var) ); // expecting bool(true), except: array(), which is not set |
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// get the keys of the $array_var |
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// get the keys of the $array_var |
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$keys = array_keys($array_var); |
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// unset each element in the array and see the working of unset, isset & empty |
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$inner_loop_counter = 1; |
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@ -130,7 +130,7 @@ foreach ($array_variables as $array_var) { |
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// calling empty, expected bool(true) |
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var_dump( empty($array_var[$key_val]) ); |
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// dump the array to see that that array did not get modified |
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// dump the array to see that that array did not get modified |
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// because of using isset, empty and unset on its element |
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var_dump($array_var); |
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} |
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@ -184,11 +184,11 @@ foreach ($resources as $resource) { |
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// now the isset() with both the args as unset |
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var_dump( isset($resource, $temp_var) ); // expected: bool(false); |
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// dump the resource to see if there any effect on it |
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// dump the resource to see if there any effect on it |
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var_dump($resource); |
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} |
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// unset and dump the array containing all the resources to see that |
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// unset works correctly |
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// unset works correctly |
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unset($resources); |
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var_dump($resources); |
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var_dump( isset($resources) ); //expected: bool(false) |
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@ -215,8 +215,8 @@ class Point |
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} |
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$point1 = new Point(30,40); |
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// use unset/empty/isset to check the object |
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var_dump($point1); // dump the object |
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// use unset/empty/isset to check the object |
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var_dump($point1); // dump the object |
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// check the object and member that is not set |
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var_dump( isset($point1) ); // expected: bool(true) |
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@ -229,7 +229,7 @@ $point1->setLable("Point1"); |
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var_dump( isset($point1->$lable) ); //expected: bool(true) |
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var_dump( empty($point1->$lable) ); //expected: bool(false) |
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// dump the object to see that obj was not harmed |
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// dump the object to see that obj was not harmed |
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// because of the usage of the isset & empty |
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var_dump($point1); |
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@ -270,11 +270,11 @@ var_dump($point2); |
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/* testing variation in operation for isset(), empty() & unset(). |
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Note: Most of the variation for function unset() is testing by a |
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set of testcases named "Zend/tests/unset_cv??.phpt", only |
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set of testcases named "Zend/tests/unset_cv??.phpt", only |
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variation not tested are attempted here */ |
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echo "\n*** Testing possible variation in operation for isset(), empty() & unset() ***\n"; |
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/* unset() variation1: checking unset on static variable inside a function. |
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/* unset() variation1: checking unset on static variable inside a function. |
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* unset() destroys the variable only in the context of the rest of a function |
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* Following calls will restore the previous value of a variable. |
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*/ |
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@ -286,14 +286,14 @@ function test_unset1() { |
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$static_var ++; |
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echo "value of static_var before unset: $static_var\n"; |
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// check using isset and empty |
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// check using isset and empty |
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var_dump( isset($static_var) ); |
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var_dump( empty($static_var) ); |
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// unset the static var |
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unset($static_var); |
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echo "value of static_var after unset: $static_var\n"; |
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// check using isset and empty |
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// check using isset and empty |
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var_dump( isset($static_var) ); |
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var_dump( empty($static_var) ); |
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@ -308,10 +308,10 @@ test_unset1(); |
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echo "\n** Testing unset() variation 2: unset on a variable passed by ref. inside of a function **\n"; |
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/* unset() variation2: Pass by reference |
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* If a variable that is PASSED BY REFERENCE is unset() inside of a function, |
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/* unset() variation2: Pass by reference |
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* If a variable that is PASSED BY REFERENCE is unset() inside of a function, |
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* only the local variable is destroyed. The variable in the calling environment |
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* will retain the same value as before unset() was called. |
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* will retain the same value as before unset() was called. |
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*/ |
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function test_unset2( &$ref_val ) { |
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// unset the variable passed |
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@ -341,14 +341,14 @@ $global_var = 10; |
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function test_unset3() { |
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global $global_var; |
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// check the $global_var using isset and empty |
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// check the $global_var using isset and empty |
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var_dump( isset($global_var) ); |
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var_dump( empty($global_var) ); |
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// unset the global var |
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unset($global_var); |
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// check the $global_var using isset and empty |
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// check the $global_var using isset and empty |
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var_dump( isset($global_var) ); |
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var_dump( empty($global_var) ); |
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} |
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Peter Kokot
7 years ago