Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Z] nest count, output buffering nesting loops nl2br( ) function non-English characters number_format( ) function numbers float types floating-point integer types variables |