When projects are getting bigger, its always nice to split things up and prepare parts of your code for general reuse.

PHP Traits (PHP 5.4+) are a nice way to do this. Adding multiple Traits or classes, requires you to make sure all are being included.

Here is a nice way to register both with the __autoload function

spl_autoload_register(function($className) {
    $fileName = __DIR__.'/class/class.' . $className . '.php';
    if (file_exists($fileName)) {
        include $fileName;
    }
});
spl_autoload_register(function($traitName) {
    $fileName =  __DIR__.'/trait/trait.' . $traitName . '.php';
   
	if (file_exists($fileName)) {
        include $fileName;
    }
});

spl_autoload_register(function($className) {

$fileName = __DIR__.'/class/class.' . $className . '.php';

if (file_exists($fileName)) {

include $fileName;

}

});

spl_autoload_register(function($traitName) {

$fileName = __DIR__.'/trait/trait.' . $traitName . '.php';

if (file_exists($fileName)) {

include $fileName;

}

});

Traits are loaded when you specify their use in a class.

class{
 use traitOne, traitTwo;
}

class{

use traitOne, traitTwo;

}

Register classes and traits for autoloading

Alexander