<?php
//Enter your code here, enjoy!
$fechaMIN = "2011-01-01";
$fechaMAX = "2012-05-31";
$ts1 = strtotime( $fechaMIN );
$ts2 = strtotime( $fechaMAX );
$year1 = date( 'Y', $ts1 );
$year2 = date( 'Y', $ts2 );
$month1 = date( 'm', $ts1 );
$month2 = date( 'm', $ts2 );
$day1 = date( 'd', $ts1 );
$day2 = date( 'd', $ts2 );
$month1_days = date( 't', $ts1 );
$month2_days = date( 't', $ts2 );
$d1 = new DateTime( date( 'Y-m-d', $ts1 ) );
$d2 = new DateTime( date( 'Y-m-d', strtotime( $fechaMAX .' +1 day') ) );
$diff = $d2->diff( $d1, true );
$month2_days = (int) date( 't ', $d2->getTimestamp() );
echo "$fechaMIN >> $fechaMAX >>>> " . date( 'Y-m-d ', $d1->getTimestamp() ) . ' >> ' . date( 'Y-m-d ', $d2->getTimestamp() ) ;
$diff_months = round( $diff->y * 12 + $diff->m + ( ( $diff->d ) / $month2_days ), 6 );
echo " >>> ". $diff_months .PHP_EOL;
preferences:
57.9 ms | 402 KiB | 5 Q