Reserved Names
PHP shares several namespaces with the custom code, and has reserved some names for its own usage.
- Namespaces: the global namespace, also known as
\is reserved for PHP. - Keywords:
fn,finally,insteadof,null,void,match, … - Some classes, constants, functions, interfaces:
die,exit, - Variables:
$GLOBALS,$_GET,…
<?php
// function void() would not compile
function theVoid() : bool { }
?>