- Misspelling of Array key (case sensitive).
- If the variable comes from another script, check the script is 'include'd or 'require'd at least once;
- Did you really define/set the Array element?
- Did you unset the Array element somewhere before?
Cuts down a bigger string strDATA into pieces by string strSEPERATOR and returns all the pieces in an array.
Use the DateTime class.
Use Debug Checkpoints to measure execution times of your application code blocks with a detailed listing of time consumption, how much went where.