Bug #55673 [Asn]: Compiler creates (unused) compiled variables for self::$foo

Edit report at https://bugs.php.net/bug.php?id=55673&edit=1 ID: 55673 Updated by: laruence@php.net Reported by: derick@php.net Summary: Compiler creates (unused) compiled variables for self::$foo Status: Assigned Type: Bug Package: Scripting Engine problem Operating System: * PHP Version: 5.3SVN-2011-09-12 (SVN) Assigned To: dmitry Block user comment: N Private report: N New Comment: after a quick digging, I found this is caused by zend_do_early_binding, which make the declare_class to NOP after use it. I will try to make a patch for this. Previous Comments: ------------------------------------------------------------------------ [2011-09-12 13:47:48] derick@php.net Description: ------------ When having the following code: <?php class foo { function bar() { self::$bar = 42; } } ?> The compiler generates compiled variable !0 for $bar, even though it's a class variable: derick@whisky:/tmp$ php -dvld.active=1 -r 'class foo { function bar() { self::$bar = 42; } }' Finding entry points Branch analysis from position: 0 Return found filename: Command line code function name: (null) number of ops: 2 compiled vars: none line # * op fetch ext return operands --------------------------------------------------------------------------------- 1 0 > NOP 1 > RETURN null branch: # 0; line: 1- 1; sop: 0; eop: 1 path #1: 0, Class foo: Function bar: Finding entry points Branch analysis from position: 0 Return found filename: Command line code function name: bar number of ops: 4 compiled vars: !0 = $bar line # * op fetch ext return operands --------------------------------------------------------------------------------- 0 > ZEND_FETCH_CLASS 1 1 FETCH_W static member $1 'bar' 2 ASSIGN $1, 42 3 > RETURN null branch: # 0; line: 1- 1; sop: 0; eop: 3 path #1: 0, End of function bar. End of class foo. 14:41 <@Derick> dmitry: I am wondering why self::$foo creates a compiled variable. Any idea? 14:42 <@Derick> dmitry: it creates it, but it's never used 14:44 <@dmitry> I see. It's probably because od simple one-pass compiler that first interpret $foo as local variable and only then as a class variable :) 14:44 <@Derick> dmitry: any way we can fix that perhaps? 14:44 <@dmitry> Derick: could you please create a bug and assign it to me 14:44 <@Derick> yes, sure ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=55673&edit=1