I am working on Point of sale system built on codeigniter. I get this error "Call to a member function num_rows() on boolean". I have just moved to linux and install lamp. I get the similar error on wamp, at that time i removed wamp and install xampp and it work. now i want to use lamp , every thing is good expect it get this error. I have changed php version but it does not help. i can not change in code because it has been used in hundred of places. currently i am using php PHP Version 7.0.27 , Apache/2.4.18, sql version :mysqladmin Ver 8.42 Distrib 5.7.20, for Linux on x86_64. also why it is working in xampp but give error on wamp and lamp, Here is full error
An uncaught Exception was encountered
Type: Error
Message: Call to a member functionnum_rows()on boolean
Filename:/var/www/html/dev.com/public_html/gspos/app/models/admin/Products_model.php
Line Number: 206 Backtrace:
File:/var/www/html/dev.com/public_html/gspos/app/controllers/admin/Products.php
Line: 2053
Function: getAllWarehousesWithPQ
File:/var/www/html/dev.com/public_html/gspos/index.php
Line: 302
Function: require_once
I think you have code smells, but if you can't edit it, maybe check the differences between Xampp config and your new config and begin by check php version.
Thanks for the Help . I just installed Xampp and it solved my problem