Small logger class for proof-of-concept

php-logging-trait

<?php
/**
 * Basic Logger Class which handles the setting and retrieving of captured arguments
 */
class Log
{
    /**
     * @var array
     */
    private static $environment = array();

    /**
     * @param $msg
     */
    public static function it($msg)
    {
        $backtrace = debug_backtrace();
        $calledFunctionName = !empty($backtrace[4]) ?  $backtrace[4]['function'] : 'unnamed';
        echo call_user_func_array('sprintf', array_merge((array)$msg, static::$environment[$calledFunctionName]));
    }

    /**
     * Sets the environmental variables
     */
    public static function set()
    {
        $backtrace = debug_backtrace();
        $calledFunctionName = !empty($backtrace[2]) ?  $backtrace[2]['function'] : 'unnamed';
        static::$environment[$calledFunctionName] = $backtrace[2]['args'];
    }
}

/**
 * Used for capturing and storing of arguments
 */
trait Logger
{
    /**
     * Hook into every Class call to capture all arguments
     * @param $name
     * @param $args
     * @return mixed
     */
    public function __call($name, $args)
    {
        Log::set();
        $result = call_user_func_array(array($this, $name), $args);
        return $result;
    }
}

class Test
{
    /** important! */
    use Logger;

    protected function doit($in, $out)
    {
        Log::it("Input from doit: in (%d) and out (%d)\n");
    }
}

$t = new Test();
$t->doit(1, 2);