Question

This snippet of code is taken from codeigniter and i’m trying to copy it into a new function that allows numeric characters and dashes. What do i need to add to this regex to allow dashes and parenthesis as well?

preg_match( '/^[\-+]?[0-9]*\.?[0-9]+$/', $str);

Answer 1

preg_match( '/^\+?[-0-9]*\.?[-0-9]+$/', $str);

update:

preg_match( '/^\+?[-0-9()]*\.?[-0-9()]+$/', $str);