Incompatibilites?

Is there any list more up-to-date than on the php site of the incompatibilites between PHP3 and PHP4? After installing PHP4, virtually none of my scripts work, and I'm not real clear why. The two biggest problems I've found are: 1) I'm not able to use a variable as a default to a parameter in the constructor to an object. I think this is what was described on the website. Pain in the neck, it was a nice feature to have that I used all over the place, but I can add a pile of IF's to my classes to handle that situation. Therefore, just an annoying problem, not a serious problem. 2) I'm not clear what the problem here actually is. Given a snippet of code like the following (assuming this function is a member of a parent class): function blah ($var = "") { if ($var == "") { $var = $GLOBALS[MY_ENV_VARIABLE]; // who knows why this doesn't work... :/ return new My_Object ( $this, $var ); } This gives a parse error on the "return" line, even though it worked fine in PHP3. I'm not sure what about it might be the problem, if its returning the object, passing $this as a variable, or maybe a problem in the constructor of the My_Object class that for some reason is being reported here instead of in the other class. I don't want to submit a bug report until I know if there was some change that causes problem #2 that just isn't documented, or what the problem is. Also, is using a value set using the define command as a default for a parameter in a contructor okay? Or does it have to be a true-blue static string or number? - George -- email:dotorg@bangsplat.org;url:www.bangsplat.org;uin:153182;aim:tgd98 GCS/GP/GS/GFA d- s+: a- C++++$ UL++++$ P+++$ L+++$ E- W++>$ N+@ !o K+++ w--- !O M-@ V PS+ PE Y+ PGP t-(+) 5- X++ R-(--) tv+ b+++ DI++ D++ G+ e* h r y++