231 lines
9.1 KiB
PHP
231 lines
9.1 KiB
PHP
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<?php
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namespace fast;
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use DateTime;
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use DateTimeZone;
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/**
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* 日期时间处理类
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*/
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class Date
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{
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const YEAR = 31536000;
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const MONTH = 2592000;
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const WEEK = 604800;
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const DAY = 86400;
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const HOUR = 3600;
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const MINUTE = 60;
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/**
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* 计算两个时区间相差的时长,单位为秒
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*
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* $seconds = self::offset('America/Chicago', 'GMT');
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*
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* [!!] A list of time zones that PHP supports can be found at
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* <http://php.net/timezones>.
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*
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* @param string $remote timezone that to find the offset of
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* @param string $local timezone used as the baseline
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* @param mixed $now UNIX timestamp or date string
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* @return integer
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*/
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public static function offset($remote, $local = null, $now = null)
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{
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if ($local === null) {
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// Use the default timezone
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$local = date_default_timezone_get();
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}
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if (is_int($now)) {
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// Convert the timestamp into a string
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$now = date(DateTime::RFC2822, $now);
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}
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// Create timezone objects
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$zone_remote = new DateTimeZone($remote);
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$zone_local = new DateTimeZone($local);
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// Create date objects from timezones
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$time_remote = new DateTime($now, $zone_remote);
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$time_local = new DateTime($now, $zone_local);
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// Find the offset
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$offset = $zone_remote->getOffset($time_remote) - $zone_local->getOffset($time_local);
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return $offset;
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}
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/**
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* 计算两个时间戳之间相差的时间
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*
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* $span = self::span(60, 182, 'minutes,seconds'); // array('minutes' => 2, 'seconds' => 2)
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* $span = self::span(60, 182, 'minutes'); // 2
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*
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* @param int $remote timestamp to find the span of
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* @param int $local timestamp to use as the baseline
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* @param string $output formatting string
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* @return string when only a single output is requested
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* @return array associative list of all outputs requested
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* @from https://github.com/kohana/ohanzee-helpers/blob/master/src/Date.php
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*/
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public static function span($remote, $local = null, $output = 'years,months,weeks,days,hours,minutes,seconds')
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{
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// Normalize output
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$output = trim(strtolower((string)$output));
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if (!$output) {
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// Invalid output
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return false;
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}
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// Array with the output formats
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$output = preg_split('/[^a-z]+/', $output);
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// Convert the list of outputs to an associative array
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$output = array_combine($output, array_fill(0, count($output), 0));
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// Make the output values into keys
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extract(array_flip($output), EXTR_SKIP);
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if ($local === null) {
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// Calculate the span from the current time
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$local = time();
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}
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// Calculate timespan (seconds)
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$timespan = abs($remote - $local);
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if (isset($output['years'])) {
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$timespan -= self::YEAR * ($output['years'] = (int)floor($timespan / self::YEAR));
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}
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if (isset($output['months'])) {
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$timespan -= self::MONTH * ($output['months'] = (int)floor($timespan / self::MONTH));
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}
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if (isset($output['weeks'])) {
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$timespan -= self::WEEK * ($output['weeks'] = (int)floor($timespan / self::WEEK));
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}
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if (isset($output['days'])) {
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$timespan -= self::DAY * ($output['days'] = (int)floor($timespan / self::DAY));
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}
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if (isset($output['hours'])) {
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$timespan -= self::HOUR * ($output['hours'] = (int)floor($timespan / self::HOUR));
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}
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if (isset($output['minutes'])) {
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$timespan -= self::MINUTE * ($output['minutes'] = (int)floor($timespan / self::MINUTE));
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}
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// Seconds ago, 1
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if (isset($output['seconds'])) {
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$output['seconds'] = $timespan;
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}
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if (count($output) === 1) {
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// Only a single output was requested, return it
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return array_pop($output);
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}
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// Return array
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return $output;
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}
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/**
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* 格式化 UNIX 时间戳为人易读的字符串
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*
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* @param int Unix 时间戳
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* @param mixed $local 本地时间
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*
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* @return string 格式化的日期字符串
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*/
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public static function human($remote, $local = null)
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{
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$time_diff = (is_null($local) || $local ? time() : $local) - $remote;
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$tense = $time_diff < 0 ? 'after' : 'ago';
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$time_diff = abs($time_diff);
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$chunks = [
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[60 * 60 * 24 * 365, 'year'],
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[60 * 60 * 24 * 30, 'month'],
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[60 * 60 * 24 * 7, 'week'],
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[60 * 60 * 24, 'day'],
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[60 * 60, 'hour'],
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[60, 'minute'],
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[1, 'second']
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];
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$name = 'second';
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$count = 0;
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for ($i = 0, $j = count($chunks); $i < $j; $i++) {
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$seconds = $chunks[$i][0];
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$name = $chunks[$i][1];
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if (($count = floor($time_diff / $seconds)) != 0) {
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break;
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}
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}
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return __("%d $name%s $tense", $count, ($count > 1 ? 's' : ''));
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}
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/**
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* 获取一个基于时间偏移的Unix时间戳
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*
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* @param string $type 时间类型，默认为day，可选minute,hour,day,week,month,quarter,year
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* @param int $offset 时间偏移量 默认为0，正数表示当前type之后，负数表示当前type之前
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* @param string $position 时间的开始或结束，默认为begin，可选前(begin,start,first,front)，end
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* @param int $year 基准年，默认为null，即以当前年为基准
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* @param int $month 基准月，默认为null，即以当前月为基准
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* @param int $day 基准天，默认为null，即以当前天为基准
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* @param int $hour 基准小时，默认为null，即以当前年小时基准
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* @param int $minute 基准分钟，默认为null，即以当前分钟为基准
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* @return int 处理后的Unix时间戳
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*/
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public static function unixtime($type = 'day', $offset = 0, $position = 'begin', $year = null, $month = null, $day = null, $hour = null, $minute = null)
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{
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$year = is_null($year) ? date('Y') : $year;
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$month = is_null($month) ? date('m') : $month;
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$day = is_null($day) ? date('d') : $day;
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$hour = is_null($hour) ? date('H') : $hour;
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$minute = is_null($minute) ? date('i') : $minute;
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$position = in_array($position, array('begin', 'start', 'first', 'front'));
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$baseTime = mktime(0, 0, 0, $month, $day, $year);
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switch ($type) {
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case 'minute':
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$time = $position ? mktime($hour, $minute + $offset, 0, $month, $day, $year) : mktime($hour, $minute + $offset, 59, $month, $day, $year);
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break;
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case 'hour':
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$time = $position ? mktime($hour + $offset, 0, 0, $month, $day, $year) : mktime($hour + $offset, 59, 59, $month, $day, $year);
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break;
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case 'day':
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$time = $position ? mktime(0, 0, 0, $month, $day + $offset, $year) : mktime(23, 59, 59, $month, $day + $offset, $year);
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break;
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case 'week':
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$weekIndex = date("w", $baseTime);
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$time = $position ?
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strtotime($offset . " weeks", strtotime(date('Y-m-d', strtotime("-" . ($weekIndex ? $weekIndex - 1 : 6) . " days", $baseTime)))) :
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strtotime($offset . " weeks", strtotime(date('Y-m-d 23:59:59', strtotime("+" . (6 - ($weekIndex ? $weekIndex - 1 : 6)) . " days", $baseTime))));
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break;
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case 'month':
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$_timestamp = mktime(0, 0, 0, $month + $offset, 1, $year);
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$time = $position ? $_timestamp : mktime(23, 59, 59, $month + $offset, self::days_in_month(date("m", $_timestamp), date("Y", $_timestamp)), $year);
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break;
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case 'quarter':
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$quarter = ceil(date('n', $baseTime) / 3) + $offset;
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$month = $quarter * 3;
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$offset_year = ceil($month/12) - 1;
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$year = $year + $offset_year;
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$month = $month - ($offset_year * 12);
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$time = $position ?
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mktime(0, 0, 0, $month-2, 1, $year) :
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mktime(23, 59, 59, $month, self::days_in_month($month, $year), $year);
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break;
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case 'year':
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$time = $position ? mktime(0, 0, 0, 1, 1, $year + $offset) : mktime(23, 59, 59, 12, 31, $year + $offset);
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break;
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default:
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$time = mktime($hour, $minute, 0, $month, $day, $year);
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break;
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}
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return $time;
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}
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/**
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* 获取指定年月拥有的天数
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* @param int $month
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* @param int $year
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* @return false|int|string
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*/
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public static function days_in_month($month, $year)
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{
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if (function_exists("cal_days_in_month")) {
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return cal_days_in_month(CAL_GREGORIAN, $month, $year);
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} else {
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return date('t', mktime(0, 0, 0, $month, 1, $year));
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}
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}
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}
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