strftime_win32.php

<?php

function strftime_win32($format, $ts = null) { 
        if (!$ts) $ts = time(); 

        $mapping = array( 
                '%C' => sprintf("%02d", date("Y", $ts) / 100), 
                '%D' => '%m/%d/%y', 
                '%e' => sprintf("%' 2d", date("j", $ts)), 
                '%h' => '%b', 
                '%n' => "\n", 
                '%r' => date("h:i:s", $ts) . " %p", 
                '%R' => date("H:i", $ts), 
                '%t' => "\t", 
                '%T' => '%H:%M:%S', 
                '%u' => ($w = date("w", $ts)) ? $w : 7 
        ); 
        $format = str_replace( 
                array_keys($mapping), 
                array_values($mapping), 
                $format 
        ); 
        
        if($format=='%V' or $format=='%G' or $format=='%g'){ 
                // When strftime("%V") fails, some unoptimized workaround 
                // 
                // http://en.wikipedia.org/wiki/ISO_8601 : week 1 is "the week with the year's first Thursday in it (the formal ISO definition)"

                
                $year = strftime("%Y", $ts); 
                $isoyear=$year; 
                
                $first_day = strftime("%w", mktime(0, 0, 0, 1, 1, $year)); 
                $last_day = strftime("%w", mktime(0, 0, 0, 12, 31, $year)); 
                
                $number = $isonumber = strftime("%W", $ts); 
                
                // According to strftime("%W"), 1st of january is in week 1 if and only if it is a monday 
                if ($first_day == 1) { 
                        $isonumber--; 
                } 
                
                // 1st of january is between monday and thursday; starting (now) at 0 when it should be 1 
                if ($first_day >= 1 && $first_day <= 4){ 
                        $isonumber++; 
                        $isoyear=$year; 
                }elseif ($number == 0){ 
                        $isonumber = mktime(0, 0, 0, 12, 31, $year - 1); 
                        $isoyear=$year; 
                } 
                if ($isonumber == 53 && ($last_day == 1 || $last_day == 2 || $last_day == 3)){ 
                        $isonumber = 1; 
                        $isoyear=$year+1; 
                } 
                if ($format=='%V') { 
                        return sprintf("%02d", $isonumber); 
                }elseif ($format=='%G'){ 
                        return sprintf("%04d", $isoyear); 
                }elseif ($format=='%g'){ 
                        return substr(sprintf("%04d", $isoyear),-2); 
                } 
                
                        
        }else{ 
                return strftime($format, $ts); 
        } 
}