php 4 script with php 5.

I am trying to transfer some databases and php scripts that populate them to a new server. Server is running Fedora core 4 with mysql 4.x and php 5.0.5. Original scripts were writen with php 4.x and worked fine. I get a PHP Notice: Undefined variable: return_array when running them on the new server and the database doesnt get populated. Mysql database and mysql user rights seem to be correct. Do I have to rewrite the script for php 5.x or should it work and I need to dig for another problem? Im quite new to php and dont know quite which way to go for help. I hope I have posted this on the right list. ddh -- Dwayne Hottinger Network Administrator Harrisonburg City Public Schools