Fix: Bad month return by function

htdocs/core/lib/date.lib.php

@@ -518,7 +518,7 @@ function dol_get_last_day($year,$month=12,$gm=false)
  *	@param		int		$day		Day
  * 	@param		int		$month		Month
  *  @param		int		$year		Year
- * 	@param		int		$gm			False = Return date to compare with server TZ, True to compare with GM date.
+ * 	@param		int		$gm			False or 0 or 'server' = Return date to compare with server TZ, True or 1 to compare with GM date.
  *	@return		array				year,month,week,first_day,prev_year,prev_month,prev_day
  */
 function dol_get_first_day_week($day,$month,$year,$gm=false)
@@ -542,7 +542,7 @@ function dol_get_first_day_week($day,$month,$year,$gm=false)
     $tmpday = date($tmparray[0])-$seconds;
 	$tmpday = date("d",$tmpday);
 
-	//Check first day of week is form this month or not
+	//Check first day of week is in same month than current day or not
 	if ($tmpday>$day)
     {
     	$prev_month = $month-1;
@@ -559,6 +559,8 @@ function dol_get_first_day_week($day,$month,$year,$gm=false)
     	$prev_month = $month;
 		$prev_year  = $year;
     }
+	$tmpmonth = $prev_month;
+	$tmpyear = $prev_year;
 
 	//Get first day of next week
 	$tmptime=dol_mktime(12,0,0,$month,$tmpday,$year,1,0);
@@ -566,7 +568,7 @@ function dol_get_first_day_week($day,$month,$year,$gm=false)
 	$tmparray=dol_getdate($tmptime,true);
     $prev_day   = $tmparray['mday'];
 
-    //Check first day of week is form this month or not
+    //Check prev day of week is in same month than first day or not
 	if ($prev_day > $tmpday)
     {
     	$prev_month = $month-1;
@@ -579,9 +581,9 @@ function dol_get_first_day_week($day,$month,$year,$gm=false)
     	}
     }
 
-    $week = date("W",dol_mktime(0,0,0,$month,$tmpday,$year,$gm));
+    $week = date("W",dol_mktime(0,0,0,$tmpmonth,$tmpday,$tmpyear,$gm));
 
-	return array('year' => $year, 'month' => $month, 'week' => $week, 'first_day' => $tmpday, 'prev_year' => $prev_year, 'prev_month' => $prev_month, 'prev_day' => $prev_day);
+	return array('year' => $year, 'month' => $month, 'week' => $week, 'first_day' => $tmpday, 'first_month' => $tmpmonth, 'first_year' => $tmpyear, 'prev_year' => $prev_year, 'prev_month' => $prev_month, 'prev_day' => $prev_day);
 }
 
 /**