src/Skeetr/Client/Handler/Error.php
public function handle($level, $message, $file, $line, $context)
    {
        if ( $this->level === 0 ) return true;

        if ( $level & (E_USER_DEPRECATED | E_DEPRECATED) ) {
            if (self::$logger !== null) {
                if ( version_compare(PHP_VERSION, '5.4', '<') ) {
                    $stack = array_slice(debug_backtrace(false), 0, 10);
                } else {
                    $stack = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 10);
                }

                self::$logger->warning($message, array(
                    'type' => self::TYPE_DEPRECATION,
                    'stack' => $stack
                ));
            }

            return true;
        }

        if ( error_reporting() & $level && $this->level & $level ) {
            $this->generateErrorException($level, $message, $file, $line, false);
        }

        return true;
    }
public function handle($level, $message, $file, $line, $context)
    {
        if ( $this->level === 0 ) return true;

        if ( $level & (E_USER_DEPRECATED | E_DEPRECATED) ) {
            if (self::$logger !== null) {
                if ( version_compare(PHP_VERSION, '5.4', '<') ) {
                    $stack = array_slice(debug_backtrace(false), 0, 10);
                } else {
                    $stack = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 10);
                }

                self::$logger->warning($message, array(
                    'type' => self::TYPE_DEPRECATION,
                    'stack' => $stack
                ));
            }

            return true;
        }

        if ( error_reporting() & $level && $this->level & $level ) {
            $this->generateErrorException($level, $message, $file, $line, false);
        }

        return true;
    }
This method will be used by set_error_handler

@throws \ErrorException When error_reporting returns error