Generate NACHA file using PHP?

Question

I am trying to generate a bank NACHA (national automated clearing house association) file with my customers payment details to submit to my bank on a regular basis. Our site

Answer 1

The National ACH Association "NACHA" publishes the ACH rules on an annual basis. The current version, "2012 NACHA OPERATING RULES & GUIDELINES", contains the ACH rules, along with ACH file formats (i.e. Reference Guide) for creating your own tools to build ACH files.

http://www.achrulesonline.org/