below are the things i dont understand, if you could please explain it clrearly and as simple as posibile with a example if you could
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strpos()
strlen()
foo - i've seen it in a few examples but i dont know why its being used
boolean - i know it has to do with something being FALSE or TRUE
array - totally dont get this one
object
session
function - can you set your own function or wut????
. - when sometime in a code they have $a = 3 and $b .=$a
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thats all that i have for now