PHP 4.0 Bug #3647: Change to Global variable in Function Fails

From: pour@mieterra.com Operating system: Linux 2.2.x PHP version: 4.0 Beta 4 Patch Level 1 PHP Bug Type: Scripting Engine problem Bug description: Change to Global variable in Function Fails Changing a Global variable in a function fails when the Global variable is unset. An easy example: <?php class test { var $a="a here"; var $b = "b here"; } $t = new test; $t->a = "b here"; function changeGlobal() { GLOBAL $t; unset($t); $t = new test; } echo "t->a = $t->a\n"; changeGlobal(); echo "t->a = $t->a\n"; ?> When executed, this displays: t->a = b here t->a = b here proving that the new assignment to 't' in changeGlobal had no effect. Note that the result is correct if using GLOBALS["t"] in changeGlobal; it also works when removing the 'unset' statement in changeGlobal or redeclaring "GLOBAL $t" right after the unset. Presumably the function forgets the scope of 't' after the unset is executed. Regards, Andreas