Load Nagati shows you 11 powerful ways to debug WordPress and PHP errors starting with the famous WP_Debug, and then covering some more advanced methods.
Tag: WordPress errors
Debugging WordPress: 11 Powerful Tips and Techniques
Displaying Errors from the save_post Hook in WordPress
James DiGioia walks through 3 potential methods of solving the problem, as well as how to implement each one, the pros and cons, and which they're best fit.