php时间日期工具类的实现代码

2. /**
3. * 功能：php时间与日期工具类
4. * 编辑：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 $yr = (integer) date("Y");
40. $century = (integer) ($yr /100);
42. if ($yr%100 > 50) {
43. $c1 = $century + 1;
44. $c0 = $century;
45. } else {
46. $c1 = $century;
47. $c0 = $century - 1;
48. }
49. $c1 *= 100;
50. // if 2-digit year is less than 30 years in future, set it to this century
51. // otherwise if more than 30 years in future, then we set 2-digit year to the prev century.
52. if (($y + $c1) else $y = $y + $c0*100;
53. }
54. return $y;
55. }
57. /**
58. * Returns 4-digit representation of the year.
59. * @param integer $y year
60. * @return integer 4-digit representation of the year
61. */
62. public static function get4DigitYear($y)
63. {
64. return self::digitCheck($y);
65. }
66. /**
67. * Checks to see if the year, month, day are valid combination.
68. * @param integer $y year
69. * @param integer $m month
70. * @param integer $d day
71. * @return boolean true if valid date, semantic check only.
72. */
73. public static function isValidDate($y,$m,$d)
74. {
75. return checkdate($m, $d, $y);
76. }
78. public static function checkDate($date, $separator = "-") { //检查日期是否合法日期
79. $dateArr = explode ($separator, $date);
80. return self::isValidDate ($dateArr[0], $dateArr[1], $dateArr[2]);
81. }
82. /**
83. * Checks to see if the hour, minute and second are valid.
84. * @param integer $h hour
85. * @param integer $m minute
86. * @param integer $s second
87. * @param boolean $hs24 whether the hours should be 0 through 23 (default) or 1 through 12.
88. * @return boolean true if valid date, semantic check only.
89. * @since 1.0.5
90. */
91. public static function isValidTime($h,$m,$s,$hs24=true)
92. {
93. if($hs24 && ($h 23) || !$hs24 && ($h 12)) return false;
94. if($m > 59 || $m if($s > 59 || $s return true;
95. }
97. public static function checkTime($time, $separator = ":") { //检查时间是否合法时间
98. $timeArr = explode($separator, $time);
99. return self::isValidTime($timeArr[0], $timeArr[1],$timeArr[2]);
100. }
102. public static function addDate($date, $int, $unit = "d") { //日期的增加
103. $value = array('y'=>'', 'm'=>'', 'd'=>'');
104. $dateArr = explode ( "-", $date);
105. if(array_key_exists($unit, $value)){
106. $value[$unit] = $int;
107. }else{
108. return false;
109. }
110. return date ("Y-m-d", mktime (0, 0, 0, $dateArr[1] + $value['m'], $dateArr[2] + $value['d'], $dateArr[0] +$value['y']));
111. }
113. public static function addDateTime($date, $int, $unit = "d") { //日期的增加
114. $value = array('y'=>'', 'm'=>'', 'd'=>'', 'h'=>'', 'i'=>'');
115. $dateArr = preg_split ( "/-|\s|:/", $date);
116. if(array_key_exists($unit, $value)){
117. $value[$unit] = $int;
118. }else{
119. return false;
120. }
121. return date ("Y-m-d H:i:s", mktime($dateArr[3]+ $value['h'], $dateArr[4]+ $value['i'], $dateArr[5], $dateArr[1] + $value['m'], $dateArr[2] + $value['d'], $dateArr[0] + $value['y']));
122. }
124. public static function addDayTimestamp($ntime, $aday) { //取当前时间后几天，天数增加单位为1
125. $dayst = 3600 * 24;
126. $oktime = $ntime + ($aday * $dayst);
127. return $oktime;
128. }
130. public static function dateDiff($begin, $end, $unit = "d") { //时间比较函数，返回两个日期相差几秒、几分钟、几小时或几天
131. $diff = strtotime($end) - strtotime($begin);
132. switch($unit)
133. {
134. case "y": $retval = bcdiv($diff, (60 * 60 * 24 * 365)); break;
135. case "m": $retval = bcdiv($diff, (60 * 60 * 24 * 30)); break;
136. case "w": $retval = bcdiv($diff, (60 * 60 * 24 * 7)); break;
137. case "d": $retval = bcdiv($diff, (60 * 60 * 24)); break;
138. case "h": $retval = bcdiv($diff, (60 * 60)); break;
139. case "i": $retval = bcdiv($diff, 60); break;
140. case "s": $retval = $diff; break;
141. }
142. return $retval;
143. }
145. public static function getWeekDay($date, $separator = "-") { //计算出给出的日期是星期几
146. $dateArr = explode ($separator, $date);
147. return date ("w", mktime ( 0, 0, 0, $dateArr[1], $dateArr[2], $dateArr[0]));
148. }
150. public static function timeFromNow($dateline) { //让日期显示为:XX天XX年以前
151. if(empty($dateline)) return false;
152. $seconds = time() - $dateline;
153. if($seconds return "1分钟前";
154. }elseif($seconds return floor($seconds/60)."分钟前";
155. }elseif($seconds return floor($seconds/3600)."小时前";
156. }elseif($seconds return date("昨天 H:i", $dateline)."";
157. }else{
158. return date('Y-m-d', $dateline);
159. }
160. }
162. public static function transDateToChs($date) {
163. if (empty ($date)) return '今日';
164. date_default_timezone_set('PRC');
165. $dates = date ('Y年m月d日', strtotime ($date));
166. return $dates;
167. }
169. // 08/31/2004 => 2004-08-31
170. public static function TransDateUI($datestr, $type = 'Y-m-d') {
171. if ($datestr == Null)
172. return Null;
173. $target = $datestr;
174. $arr_date = preg_split ( "/\//", $target);
175. $monthstr = $arr_date[0];
176. $daystr = $arr_date[1];
177. $yearstr = $arr_date[2];
178. $result = date ($type, mktime (0, 0, 0, $monthstr, $daystr, $yearstr));
179. return $result;
180. }
182. // 12/20/2004 10:55 AM => 2004-12-20 10:55:00
183. public static function TransDateTimeUI($datestr, $type = 'Y-m-d H:i:s') {
184. if ($datestr == Null)
185. return Null;
186. $target = $datestr;
187. $arr_date = preg_split ( "/\/|\s|:/", $target);
188. $monthstr = $arr_date[0];
189. $daystr = $arr_date[1];
190. $yearstr = $arr_date[2];
191. $hourstr = $arr_date[3];
192. $minutesstr = $arr_date[4];
193. $result = date ($type, mktime ($hourstr, $minutesstr, 0, $monthstr, $daystr, $yearstr));
194. return $result;
195. }
196. }
197. ?>

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