These are objects that act like arrays, they are not native PHP arrays and will not pass an is_array() test. As they are objects, unlike PHP arrays, they are always passed by reference.

Debug functions for PHP arrays to calculate things like hash distribution and other internal information - pmmp/ext-arraydebug ...

Long story short, i'm trying to optimize a situation where I need to iterate through an array of about 3000 items and check to see if they are in another array of up to 3000 items.Obviously, the ...