This class can calculate the percentage of the days that passed.

date-percentage.php

<?php
 /*
 *I dont know if this can be useful for you but
 *
 *I came up with it, and I give it as a present to you.
 *
 *I'm not a skillful programmer, I just enjoy doing this,
 *
 *Thanks for reading
 *********************************************************
 *No se si realmente esto te ser? util pero
 *
 *Se me ocurri? y te lo estoy regalando
 *
 *No soy un avanzado programador, solo disfruto haciendo
 *
 *Estas peque?as cosas
 *
 *Gracias por leer
 */
class datePercent
{

public function percDays()
{
$daysofmonth=cal_days_in_month(CAL_GREGORIAN,date('j'),date('Y')); //Obtaining if this month has 28, 30 or 31 days
$today=date('d');
$perc= round ($today / $daysofmonth * 100, PHP_ROUND_HALF_DOWN); //rounding the result
return $perc ;
}

public function percMonth()
{
$today=date('d');
$perc= round ($today / 365 * 100, PHP_ROUND_HALF_DOWN); //rounding the result
return $perc;
}
}
$obj= new datepercent;
echo '<pre>';
echo 'This month is to the '.$obj->percDays().' percent';
echo '<br>';
echo 'This year is to the '.$obj->percMonth().' percent';