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I am trying to optimize my php code and I realize I am including the 'init.php' which contains the code connecting to database in every single php page. The further problem is that with every user click I essentially load another php script which mean I load the 'init' script with every single click.

is session relevant here? Maybe if I start a session and those scripts would not be included again? Or is using include_once solve the problem?

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If you are trying to optimize your code you really need to use a profiler, and not make wide speculations about what your problem might be. Random guessing will almost certainly waste your time and result in you optimizing things that aren't really the problem. – Zoredache Oct 23 '12 at 19:43

closed as off topic by Zoredache, Shane Madden, longneck, mdpc, mgorven Oct 23 '12 at 20:54

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