I a list of PHP 5 reserved words please!

Hi I have a few clients that have upgraded to PHP 5 for development projects and I am running into problems with class object naming for all my classes and COM objects that use.... '$this->' $this = new COM ( 'ibmTransate.Server' ); $this->MimeType = 'text/' . ( $key->type == '1' ? 'text' : 'html' ); PHP Fatal error: Cannot re-assign $this in j:\www\docs\www\sys\lib\functions.php on line 2189 I have been using '$this->' for a long time in 1000's of projects that I have worked on and sold! This really worries me because I will have to spend many hours changing '$this->' in all my class files and scripts that use this + I will have to contact each client and fix this, this will involved more time because many projects are encoded. I would have never thought that a common word as 'this' would be labeled as a 'PHP' reserved word! Anyway could you please post a list of all words that will be deemed 'reserved' in PHP 5! Sonia