GUIDES
break exits the loop entirely; continue skips just the current iteration — a small distinction that's easy to mix up, plus the numeric-argument form for breaking out of nested loops.
A static member belongs to the class itself, not to any individual instance — shared across every object of that class, rather than duplicated per object.
break exits the loop entirely; continue only skips to the next iteration — mixing the two up is a subtle logic bug, not a syntax error, since both are valid anywhere inside a loop.
Traits let you share a set of methods across multiple classes that can't share a common parent — a form of horizontal code reuse PHP added specifically because single inheritance wasn't enough.
