Marcelo Araujo has created a handy little extension to help validate the CPF (Cadastro de Pessoa Fisica) and CNPJ (Cadastro Nacional de Pessoa Juridica) of an individual (the Brazilian equivalent of the US social security number).

have decided to implement it in order to compare some performance between userland functions and native functions. The fact is: almost 300x faster than the same userland function(s)! PS: It is just a toy, there is no relation with PECL extensions.... If you want to take a look, just follow the instructions below.

His instructions are simple, and if you've ever installed an extension before you know what to do.