php: fixed Type specifications

git-svn-id: http://haxe.googlecode.com/svn/trunk@6166 f16182fa-f095-11de-8f43-4547254af6c6
php: fixed Std.is for integers out of int32 boundaries

git-svn-id: http://haxe.googlecode.com/svn/trunk@6167 f16182fa-f095-11de-8f43-4547254af6c6
php: fixed Math specification

git-svn-id: http://haxe.googlecode.com/svn/trunk@6168 f16182fa-f095-11de-8f43-4547254af6c6
php: minor improvments on previous patch by Greg Dove

git-svn-id: http://haxe.googlecode.com/svn/trunk@6169 f16182fa-f095-11de-8f43-4547254af6c6