<?php
const CONNECT_OK = 1;

error_log('Magic constants in ' . __FILE__);

class Connection {
    const DSN = 'protocol://';
    public function connect() 
    {
        error_log(__CLASS__ . '::' . __METHOD__ . '@' . __LINE__);
    }
}
function connect() { 
    /* ... */  
    error_log(__FUNCTION__ . '@' . __LINE__);
    
}

error_log(__NAMESPACE__ . ' in ' __DIR__);

trait PeanutButter {
    function traitName() {echo __TRAIT__;}
}