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Implementation code of php time and date tool class

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  2. /**
  3. * Function: php time and date tool class
  4. * Editor: bbs.it-home.org
  5. */
  6. DateTimeUtils::addDate('2013-12-01',1,'y');
  7. DateTimeUtils::getWeekDay('2013/10/01','/');
  8. DateTimeUtils::isLeapYear('2013');
  9. DateTimeUtils::timeFromNow(strtotime("2013-10-26 14:15:13"));
  10. class DateTimeUtils {
  11. /**
  12. * Checks for leap year, returns true if it is. No 2-digit year check. Also
  13. * handles julian calendar correctly.
  14. * @param integer $year year to check
  15. * @return boolean true if is leap year
  16. */
  17. public static function isLeapYear($year)
  18. {
  19. $year = self::digitCheck($year);
  20. if ($year % 4 != 0)
  21. return false;
  23. if ($year % 400 == 0)
  24. return true;
  25. // if gregorian calendar (>1582), century not-divisible by 400 is not leap
  26. else if ($year > 1582 && $year % 100 == 0)
  27. return false;
  28. return true;
  29. }
  31. /**
  32. * Fix 2-digit years. Works for any century.
  33. * Assumes that if 2-digit is more than 30 years in future, then previous century.
  34. * @param integer $y year
  35. * @return integer change two digit year into multiple digits
  36. */
  37. protected static function digitCheck($y)
  38. {
  39. if ($y < 100){
  40. $yr = (integer) date("Y");
  41. $century = (integer) ($yr /100);
  43. if ($yr%100 > 50) {
  44. $c1 = $century + 1;
  45. $c0 = $century;
  46. } else {
  47. $c1 = $century;
  48. $c0 = $century - 1;
  49. }
  50. $c1 *= 100;
  51. // if 2-digit year is less than 30 years in future, set it to this century
  52. // otherwise if more than 30 years in future, then we set 2-digit year to the prev century.
  53. if (($y + $c1) < $yr+30) $y = $y + $c1;
  54. else $y = $y + $c0*100;
  55. }
  56. return $y;
  57. }
  59. /**
  60. * Returns 4-digit representation of the year.
  61. * @param integer $y year
  62. * @return integer 4-digit representation of the year
  63. */
  64. public static function get4DigitYear($y)
  65. {
  66. return self::digitCheck($y);
  67. }
  68. /**
  69. * Checks to see if the year, month, day are valid combination.
  70. * @param integer $y year
  71. * @param integer $m month
  72. * @param integer $d day
  73. * @return boolean true if valid date, semantic check only.
  74. */
  75. public static function isValidDate($y,$m,$d)
  76. {
  77. return checkdate($m, $d, $y);
  78. }
  80. public static function checkDate($date, $separator = "-") { //检查日期是否合法日期
  81. $dateArr = explode ($separator, $date);
  82. return self::isValidDate ($dateArr[0], $dateArr[1], $dateArr[2]);
  83. }
  84. /**
  85. * Checks to see if the hour, minute and second are valid.
  86. * @param integer $h hour
  87. * @param integer $m minute
  88. * @param integer $s second
  89. * @param boolean $hs24 whether the hours should be 0 through 23 (default) or 1 through 12.
  90. * @return boolean true if valid date, semantic check only.
  91. * @since 1.0.5
  92. */
  93. public static function isValidTime($h,$m,$s,$hs24=true)
  94. {
  95. if($hs24 && ($h < 0 || $h > 23) || !$hs24 && ($h < 1 || $h > 12)) return false;
  96. if($m > 59 || $m < 0) return false;
  97. if($s > 59 || $s < 0) return false;
  98. return true;
  99. }
  101. public static function checkTime($time, $separator = ":") { //检查时间是否合法时间
  102. $timeArr = explode($separator, $time);
  103. return self::isValidTime($timeArr[0], $timeArr[1],$timeArr[2]);
  104. }
  106. public static function addDate($date, $int, $unit = "d") { //日期的增加
  107. $value = array('y'=>'', 'm'=>'', 'd'=>'');
  108. $dateArr = explode ( "-", $date);
  109. if(array_key_exists($unit, $value)){
  110. $value[$unit] = $int;
  111. }else{
  112. return false;
  113. }
  114. return date ("Y-m-d", mktime (0, 0, 0, $dateArr[1] + $value['m'], $dateArr[2] + $value['d'], $dateArr[0] +$value['y']));
  115. }
  117. public static function addDateTime($date, $int, $unit = "d") { //Add date
  118. $value = array('y'=>'', 'm'=>'', 'd'=>'', 'h'=>'', 'i'=>'');
  119. $dateArr = preg_split ( "/-|s|:/", $date);
  120. if (array_key_exists($unit, $value)){
  121. $value[$unit] = $int;
  122. }else{
  123. return false;
  124. }
  125. return date ("Y-m-d H:i:s", mktime($dateArr[ 3]+ $value['h'], $dateArr[4]+ $value['i'], $dateArr[5], $dateArr[1] + $value['m'], $dateArr[2] + $value['d'], $dateArr[0] + $value['y']));
  126. }
  128. public static function addDayTimestamp($ntime, $aday) { //Get the days after the current time, The increasing unit of days is 1
  129. $dayst = 3600 * 24;
  130. $oktime = $ntime + ($aday * $dayst);
  131. return $oktime;
  132. }
  134. public static function dateDiff($begin, $end, $unit = "d") { //Time comparison function, returns the difference in seconds, minutes, hours or days between two dates
  135. $diff = strtotime($end) - strtotime($begin);
  136. switch($unit)
  137. {
  138. case "y": $retval = bcdiv($diff, (60 * 60 * 24 * 365)); break;
  139. case "m": $retval = bcdiv($diff, (60 * 60 * 24 * 30)); break;
  140. case "w": $retval = bcdiv($diff, (60 * 60 * 24 * 7)); break;
  141. case "d": $retval = bcdiv($diff, (60 * 60 * 24)); break;
  142. case "h": $retval = bcdiv($diff, (60 * 60)); break;
  143. case "i": $retval = bcdiv($diff, 60); break;
  144. case "s": $retval = $diff; break;
  145. }
  146. return $retval;
  147. }
  149. public static function getWeekDay($date, $separator = "-") { //Calculate the given date is Day of the week
  150. $dateArr = explode ($separator, $date);
  151. return date ("w", mktime (0, 0, 0, $dateArr[1], $dateArr[2], $dateArr[0])) ;
  152. }
  154. public static function timeFromNow($dateline) { //Let the date be displayed as: XX days XX years ago
  155. if(empty($dateline)) return false;
  156. $seconds = time() - $dateline;
  157. if($seconds < 60){
  158. return "1 minute ago";
  159. }elseif($seconds < 3600){
  160. return floor($seconds/60)."minutes ago";
  161. }elseif($seconds < ; 24*3600){
  162. return floor($seconds/3600)."hours ago";
  163. }elseif($seconds < 48*3600){
  164. return date("Yesterday H:i", $dateline)." ";
  165. }else{
  166. return date('Y-m-d', $dateline);
  167. }
  168. }
  170. public static function transDateToChs($date) {
  171. if (empty ($date)) return 'today';
  172. date_default_timezone_set('PRC');
  173. $dates = date ('Y year m month d day', strtotime ($date));
  174. return $dates;
  175. }
  177. // 08/31/2004 => 2004- 08-31
  178. public static function TransDateUI($datestr, $type = 'Y-m-d') {
  179. if ($datestr == Null)
  180. return Null;
  181. $target = $datestr;
  182. $arr_date = preg_split ( "/ //", $target);
  183. $monthstr = $arr_date[0];
  184. $daystr = $arr_date[1];
  185. $yearstr = $arr_date[2];
  186. $result = date ($type, mktime (0 , 0, 0, $monthstr, $daystr, $yearstr));
  187. return $result;
  188. }
  190. // 12/20/2004 10:55 AM => 2004-12-20 10:55:00
  191. public static function TransDateTimeUI($datestr, $type = 'Y-m-d H:i:s') {
  192. if ($datestr == Null)
  193. return Null;
  194. $target = $datestr;
  195. $arr_date = preg_split ( "// |s|:/", $target);
  196. $monthstr = $arr_date[0];
  197. $daystr = $arr_date[1];
  198. $yearstr = $arr_date[2];
  199. $hourstr = $arr_date[3] ;
  200. $minutesstr = $arr_date[4];
  201. $result = date ($type, mktime ($hourstr, $minutesstr, 0, $monthstr, $daystr, $yearstr));
  202. return $result;
  203. }
  204. }
  205. ?>
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