board > note > Date() 함수

string date ( string $format [, int $timestamp ] )

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// set the default timezone to use. Available since PHP 5.1
date_default_timezone_set('UTC');

// Prints something like: Monday
echo date("l");

// Prints something like: Monday 8th of August 2005 03:12:46 PM
echo date('l jS \of F Y h:i:s A');

// Prints: July 1, 2000 is on a Saturday
echo "July 1, 2000 is on a " . date("l", mktime(0, 0, 0, 7, 1, 2000));

/* use the constants in the format parameter */
// prints something like: Mon, 15 Aug 2005 15:12:46 UTC
echo date(DATE_RFC822);

// prints something like: 2000-07-01T00:00:00+00:00
echo date(DATE_ATOM, mktime(0, 0, 0, 7, 1, 2000));
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// prints something like: Wednesday the 15th
echo date("l \\t\h\e jS");
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$tomorrow  = mktime(0, 0, 0, date("m")  , date("d")+1, date("Y"));
$lastmonth = mktime(0, 0, 0, date("m")-1, date("d"),   date("Y"));
$nextyear  = mktime(0, 0, 0, date("m"),   date("d"),   date("Y")+1);
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// Assuming today is March 10th, 2001, 5:16:18 pm, and that we are in the
// Mountain Standard Time (MST) Time Zone

$today = date("F j, Y, g:i a");                 // March 10, 2001, 5:16 pm
$today = date("m.d.y");                         // 03.10.01
$today = date("j, n, Y");                       // 10, 3, 2001
$today = date("Ymd");                           // 20010310
$today = date('h-i-s, j-m-y, it is w Day');     // 05-16-18, 10-03-01, 1631 1618 6 Satpm01
$today = date('\i\t \i\s \t\h\e jS \d\a\y.');   // it is the 10th day.
$today = date("D M j G:i:s T Y");               // Sat Mar 10 17:16:18 MST 2001
$today = date('H:m:s \m \i\s\ \m\o\n\t\h');     // 17:03:18 m is month
$today = date("H:i:s");                         // 17:16:18
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/**
   * Handles a date in the format YYYYMMDD.
   *
   * Doesn't take a genius to modify it to use some other format.

   * We provide either of the following units:
   *   'h' -> 'hour', 'i' -> 'minute', 's' -> 'second',
   *   'm' -> 'month','d' -> 'day'   , 'y' -> 'year'
   */
    public static function getNextDate($date, $amount, $unit='d'){
      $dividers = array(' ', ':', '_', '-', '/', '|');
      $date = str_replace($dividers, '', $date);
      $unit = strtolower($unit);
      list($y, $m, $d) = array(substr($date, 0, 4), substr($date, 4, 2), substr($date, 6));
      list($h, $i, $s) = array(1, 0, 0);
      $x = substr($unit, 0, 1);
      $$x += $amount;
      return date('Ymd', mktime($h, $i, $s, $m, $d, $y));
    }
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function get_next_invoice_date($source_date, $last_date)
{

    if (is_null($last_date) || ($last_date == ''))
    {
      return $source_date;
    }

    $srctime = strtotime($source_date);
    $lasttime = strtotime($last_date);

    $source_day = date("d", $srctime);

    $next_month = date("Y-m", strtotime( date("Ym", $lasttime) . '01 +1 month' ));

    $next_month_time = strtotime($next_month);

    $next_month_last_day = date("d", strtotime("-1 second", strtotime("+2 month", strtotime( date("Y", $lasttime) . date("m", $lasttime) . "01" ))));

    if ($source_day > $next_month_last_day)
    {
      $new_day = $next_month_last_day;
    }
    else
    {
      $new_day = $source_day;
    }

    $next_invoice_date = $next_month . '-' . $new_day;

    return $next_invoice_date;

} // get_next_invoice_date

// Test:
$first_invoice_date = '2011-01-31';
$last_invoice_date = '';
$list = array();

for ($i = 1; $i <= 24; $i++)
{
    $last_invoice_date = get_next_invoice_date($first_invoice_date, $last_invoice_date);
    $list[] = $last_invoice_date;
}

print_r($list);

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