manually set the error condition and write it in seperate file

If i know the error in my script, then i want to handle the error manually,by giving some conditions and i want to write the error manually and
i want to save that error in the seperate file (for ex in java we are doing by try,catch block)
if any body knows this in php coding

 

I posted a solution to your problem in your other 2 posts:
http://forums.digitalpoint.com/showthread.php?t=373334
http://forums.digitalpoint.com/showthread.php?t=373163

The first one clearly says how you can capture the errors, and how to store the errors in a separate file, instead of the error log

 

http://php.net/trigger_error
http://php.net/manual/en/function.set-error-handler.php