which one module run before the php module?

["ericwu" <kundawu@xxxxxxxxxx>]

Hi everyone,

 

I want write one module and make sure it run before the php module,

but I don't know how to start.

I try write the input filter, but it's failed....

 

Somebody can tell me that which one module run before the php module?

I want study the source reference this module.

 

Thanks.

 

Eric