日志格式化类 Date.class.php

<?php
class Datefmt{function __construct() {}/*** 根据指定日期获取所在周的起始时间和结束时间*/public function get_weekinfo_by_date($date) {$idx = strftime("%u", strtotime($date));$mon_idx = $idx - 1;$sun_idx = $idx - 7;return array('week_start_day' => strftime('%Y-%m-%d', strtotime($date) - $mon_idx * 86400),'week_end_day' => strftime('%Y-%m-%d', strtotime($date) - $sun_idx * 86400),);}/*** 根据指定日期获取所在月的起始时间和结束时间*/public function get_monthinfo_by_date($date){$ret = array();$timestamp = strtotime($date);$mdays = date('t', $timestamp);return array('month_start_day' => date('Y-m-1', $timestamp),'month_end_day' => date('Y-m-'.$mdays, $timestamp));}/*** 获取指定日期之间的各个周*/public function get_weeks($sdate, $edate) {$range_arr = array();// 检查日期有效性$this->check_date(array($sdate, $edate));// 计算各个周的起始时间do {$weekinfo = $this->get_weekinfo_by_date($sdate);$end_day = $weekinfo['week_end_day'];$start = $this->substr_date($weekinfo['week_start_day']);$end = $this->substr_date($weekinfo['week_end_day']);$range = "{$start} ~ {$end}";$range_arr[] = $range;$sdate = date('Y-m-d', strtotime($sdate)+7*86400);}while($end_day < $edate);return $range_arr;}/*** 获取指定日期之间的各个月*/public function get_months($sdate, $edate) {$range_arr = array();do {$monthinfo = $this->get_monthinfo_by_date($sdate);$end_day = $monthinfo['month_end_day'];$start = $this->substr_date($monthinfo['month_start_day']);$end = $this->substr_date($monthinfo['month_end_day']);$range = "{$start} ~ {$end}";$range_arr[] = $range;$sdate = date('Y-m-d', strtotime($sdate.'+1 month'));}while($end_day < $edate);return $range_arr;}/*** 截取日期中的月份和日* @param string $date* @return string $date*/public function substr_date($date) {if ( ! $date) return FALSE;return date('m-d', strtotime($date));}/*** 检查日期的有效性 YYYY-mm-dd* @param array $date_arr* @return boolean*/public function check_date($date_arr) {$invalid_date_arr = array();foreach ($date_arr as $row) {$timestamp = strtotime($row);$standard = date('Y-m-d', $timestamp);if ($standard != $row) $invalid_date_arr[] = $row;}if ( ! empty($invalid_date_arr)) {die("invalid date -> ".print_r($invalid_date_arr, TRUE));}}
}

类文件的使用

<?phprequire_once "Datefmt.class.php";$datefmt = new Datefmt();// 输出11月1日和30日之间的各周var_dump($datefmt->get_weeks('2014-11-05', '2014-11-29'));/*结果为array(4) {[0]=>string(13) "11-03 ~ 11-09"[1]=>string(13) "11-10 ~ 11-16"[2]=>string(13) "11-17 ~ 11-23"[3]=>string(13) "11-24 ~ 11-30"}*/// 输出2月1日和11月30日var_dump($datefmt->get_months('2014-02-03', '2014-11-29'));/*结果为array(10) {[0]=>string(13) "02-01 ~ 02-28"[1]=>string(13) "03-01 ~ 03-31"[2]=>string(13) "04-01 ~ 04-30"[3]=>string(13) "05-01 ~ 05-31"[4]=>string(13) "06-01 ~ 06-30"[5]=>string(13) "07-01 ~ 07-31"[6]=>string(13) "08-01 ~ 08-31"[7]=>string(13) "09-01 ~ 09-30"[8]=>string(13) "10-01 ~ 10-31"[9]=>string(13) "11-01 ~ 11-30"}*/