PHP 4.0 Bug #6750: passing undefined variables by reference mangles function parameters

From: dshadow@zort.net Operating system: Linux PHP version: 4.0.2 PHP Bug Type: Scripting Engine problem Bug description: passing undefined variables by reference mangles function parameters Passing an undefined variable or function result to a function expecting said parameter by reference mangles the function parameters. The following script results in this output: SomeFunc(2, 2, 2) //this is really bad SomeFunc(1, 2, 1) //This is correct SomeFunc(1, 2, 2) //This isn't correct, but it's not good either This bug is in PHP 4.0.2 and the 4.0.3 CVS. The earliest version I know of with the problem is a 4.0.2 CVS with a build date of Jul 21, so the problem has existed since at least then. --- function returnUndef() { return $foo; } function returnDef() { return 1; } function SomeFunc($a, $b, &$c) { echo("SomeFunc($a, $b, $c)\n"); } SomeFunc(1, 2, returnUndef()); SomeFunc(1, 2, returnDef()); SomeFunc(1, 2, $bar);