1--TEST-- 2Test debug_zval_dump() function : usage variations 3--INI-- 4allow_call_time_pass_reference=1 5--FILE-- 6<?php 7/* Prototype: void debug_zval_dump ( mixed $variable ); 8 Description: Dumps a string representation of an internal zend value 9 to output. 10*/ 11 12echo "*** Testing debug_zval_dump() on functions ***\n"; 13echo "--- Variation 1: global variable inside a function ---\n"; 14$global_var = 10; //declaring global variable 15 16/* function to dump reference count of global variable,$global_var 17 and local variable,$local_var */ 18function dump_globalvar( &$local_var ) { 19 global $global_var; 20 echo "\n-- Value of local variable inside dump_globalvar() --\n"; 21 debug_zval_dump( $local_var ); 22 echo "\n-- Value of global variable inside dump_globalvar() --\n"; 23 debug_zval_dump( $global_var ); 24} 25/* dump value and reference count of $global_var using debug_zval_dump() */ 26echo "\n-- Value of global variable, before calling dump_globalvar() --\n"; 27debug_zval_dump( $global_var ); 28 29/* calling function dump_globalvar() to check the reference count of local 30 and global variables inside the function */ 31dump_globalvar( $global_var ); 32 33/* dump value and reference count of $global_var after exiting function 34 dump_globalvar(); 35 expected: reference count of $global_var should remain the same as 36 before calling dump_globalvar() function */ 37echo "\n-- Value of global variable, after exiting dump_globalvar() --\n"; 38debug_zval_dump( $global_var ); 39 40echo "\n--- Variation 2: one variable references another ---\n"; 41$first_var = 10; 42/* dump value and reference count of $first_var */ 43echo "\n-- Value of \$first_var: --\n"; 44debug_zval_dump($first_var); 45 46/* $ref_first_var references $first_var */ 47$ref_first_var = &$var_1; 48 49echo "\n-- Value of \$ref_first_var --\n"; 50debug_zval_dump($ref_first_var); 51echo "\n-- Value of \$first_var --\n"; 52debug_zval_dump($first_var); 53 54unset($ref_first_var); 55 56/* dump value and reference count of $first_var, $ref_first_var 57 here $ref_first_var is unset */ 58echo "\n-- Value of \$ref_first_var --\n"; 59debug_zval_dump($ref_first_var); 60echo "\n-- Value of \$first_var --\n"; 61debug_zval_dump($first_var); 62 63echo "\n--- Variation 3: multiple references of variables ---\n"; 64$var_1 = 10; 65$var_2 = &$var_1; 66$var_3 = &$var_2; 67echo "\n-- Value of \$var_1: (before referencing) --\n"; 68debug_zval_dump($var_1); 69echo "\n-- Value of \$var_2: (referencing var_1) --\n"; 70debug_zval_dump($var_2); 71echo "\n-- Value of \$var_3: (referencing var_2) --\n"; 72debug_zval_dump($var_3); 73 74/* unsetting $var_3 */ 75unset($var_3); 76echo "\n-- Value of \$var_3: (after unsetting var_3) --\n"; 77debug_zval_dump($var_3); 78echo "\n-- Value of \$var_2: --\n"; 79debug_zval_dump($var_2); 80echo "\n-- Value of \$var_3: --\n"; 81debug_zval_dump($var_1); 82 83/* unsetting $var_1 */ 84unset($var_1); 85echo "\n-- Value of \$var_1: (after unsetting variable_1) --\n"; 86debug_zval_dump($var_1); 87echo "\n-- Value of \$var_2: --\n"; 88debug_zval_dump($var_2); 89 90echo "\n*** Testing debug_zval_dump() on miscelleneous input arguments ***\n"; 91/* unset a variable */ 92$unset_var = 10.5; 93unset($unset_var); 94 95$misc_values = array ( 96 /* nulls */ 97 NULL, 98 null, 99 100 /* unset variable */ 101 @$unset_var, 102 103 /* undefined variable */ 104 @$undef_var, 105 106 /* mixed types */ 107 @TRUE123, 108 "123string", 109 "string123", 110 "NULLstring" 111); 112/* loop to display the variables and its reference count using 113 debug_zval_dump() */ 114$counter = 1; 115foreach( $misc_values as $value ) { 116 echo "-- Iteration $counter --\n"; 117 debug_zval_dump( $value ); 118 debug_zval_dump( &$value ); 119 $counter++; 120} 121 122echo "Done\n"; 123?> 124 125--EXPECTF-- 126*** Testing debug_zval_dump() on functions *** 127--- Variation 1: global variable inside a function --- 128 129-- Value of global variable, before calling dump_globalvar() -- 130long(10) refcount(2) 131 132-- Value of local variable inside dump_globalvar() -- 133long(10) refcount(1) 134 135-- Value of global variable inside dump_globalvar() -- 136long(10) refcount(1) 137 138-- Value of global variable, after exiting dump_globalvar() -- 139long(10) refcount(2) 140 141--- Variation 2: one variable references another --- 142 143-- Value of $first_var: -- 144long(10) refcount(2) 145 146-- Value of $ref_first_var -- 147NULL refcount(1) 148 149-- Value of $first_var -- 150long(10) refcount(2) 151 152-- Value of $ref_first_var -- 153 154Notice: Undefined variable: ref_first_var in %s on line %d 155NULL refcount(1) 156 157-- Value of $first_var -- 158long(10) refcount(2) 159 160--- Variation 3: multiple references of variables --- 161 162-- Value of $var_1: (before referencing) -- 163long(10) refcount(1) 164 165-- Value of $var_2: (referencing var_1) -- 166long(10) refcount(1) 167 168-- Value of $var_3: (referencing var_2) -- 169long(10) refcount(1) 170 171-- Value of $var_3: (after unsetting var_3) -- 172 173Notice: Undefined variable: var_3 in %s on line %d 174NULL refcount(1) 175 176-- Value of $var_2: -- 177long(10) refcount(1) 178 179-- Value of $var_3: -- 180long(10) refcount(1) 181 182-- Value of $var_1: (after unsetting variable_1) -- 183 184Notice: Undefined variable: var_1 in %s on line %d 185NULL refcount(1) 186 187-- Value of $var_2: -- 188long(10) refcount(2) 189 190*** Testing debug_zval_dump() on miscelleneous input arguments *** 191-- Iteration 1 -- 192NULL refcount(3) 193&NULL refcount(2) 194-- Iteration 2 -- 195NULL refcount(3) 196&NULL refcount(2) 197-- Iteration 3 -- 198NULL refcount(1) 199&NULL refcount(2) 200-- Iteration 4 -- 201NULL refcount(1) 202&NULL refcount(2) 203-- Iteration 5 -- 204string(7) "TRUE123" refcount(3) 205&string(7) "TRUE123" refcount(2) 206-- Iteration 6 -- 207string(9) "123string" refcount(3) 208&string(9) "123string" refcount(2) 209-- Iteration 7 -- 210string(9) "string123" refcount(3) 211&string(9) "string123" refcount(2) 212-- Iteration 8 -- 213string(10) "NULLstring" refcount(3) 214&string(10) "NULLstring" refcount(2) 215Done 216
