将录音时长更改为多少秒

/**
     * 将录音时长更改为秒数
     * @param string $duration 时间长度
     * @return mixed 秒数
     */
    public function ChangeDurationToSeconds( $duration = '00:00:00' )
    {
        $parsed  = date_parse($duration);
        $seconds = $parsed['hour'] * 3600 + $parsed['minute'] * 60 + $parsed['second'];

        if( $seconds < 1 )
        {
            $seconds = '1';
        }
        return $seconds . '秒';
    }