PHP 5 allows class specific constants, which works just like regular constants, but are limited
to the scope of the given class.
<?php
class foo {
const file_name = __FILE__;
}
// will print current file name
echo foo::file_name;
?>
<?php
class foo {
const file_name = __FILE__;
}
// will print current file name
echo foo::file_name;
?>