Hooks

I am new in codeigniter. Can any one help me with hooks and why it's used for ? Thank you.. and I am not sure where to post so, I posted here.

For certain reason which I'm also still finding out, Codeigniter does not handle errors with try-catch. So if you switch your environment to production, user will see the 'snag' error which you most probably don't want it. In previous version, some functions don't throw error, so you can still check for unexpected result and handle it without a hook. Latest version giving straight crash so you have no chance to check for it. For example when establishing a database connection ($db->conect()). And here comes the hook for the rescue.

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