2 years leaving PHP and l remember nothing

Gosh! i never thought that my memory would be this bad. As of today, i was doing my refreshment on array cause drupal use excessive array in its coding and i'm quite not comfortable with arrays, so i though going through a simple PHP program could benefit me. So I typed down some simple codes making use of arrays, then when i want to use a simple iteration command like for, i kinda not sure of correct way of using it. This is bad as for-while and any looping structure are basics in PHP, and how can i have forgotten on how to use them correctly. So i opened up some of my previous codings that i have written. There were a lot of libraries that i have written for my earlier Wordpress projects so i thought i could recall easier by studying previous familiar codes. Well, i'm sort of lost with some of my own PHP commands which i found them as peculiar. It looks like i have lost so much in my programming touch in the past 2 years.

I can only blame myself for being such silly wasting my effort and time on office work!
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PHP.net function link

This is the reference of all PHP functions as in php.net.
http://www.php.net/manual/en/