Convert approx 100 lines VB code to php

Convert approx 100 lines VB code to php The code basically processes a string of information and converts it into a new format, its mostly string handling and some mathematical functions. if the input data is not in correct format, or some other error, it should just return empty string. vb code included and some sample input data, as well ( seems some problem attaching code at moment ) thank you for your interest