I've got a bunch of $_POST values being brought over from a form. Many of these values are from checkboxes, with the form names all starting with 'field_'. These signify the columns in a chart that ...

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.<BR><BR>Obviously, ...