Parameters object Procedural style only: A object returned by format The format of the outputted date string. The function could certainly be made much more powerful, to allow you to set different days to be ignored e. (PHP 5. Here are some the date-related formatting characters that are commonly used in format string:• I know how to take it from the database, not how to use it, though. Formatting the Dates and Times with PHP The format parameter of the date function is in fact a string that can contain multiple characters allowing you to generate a date string containing various components of the date and time, like day of the week, AM or PM, etc. To illustrate this, I will use the PHP. 3, use the code below it should work in PHP 4 as well. 这和 Y 的值相同,只除了如果 ISO 的星期数( W)属于前一年或下一年,则用那一年。 Note that incorrect results will be returned for years less than 1601 or greater than 2399. "skip all Fridays and Saturdays but include Sundays" or to set up dates that should always be skipped e. If the optional timestamp is not provided, the value of time is used. I've tested it pretty strenuously but date arithmetic is complicated and there's always the possibility I missed something, so please feel free to check my math. PHP DateTime objects include an internal DateTimeZone class instance to track time zones. I still believe that for most purposes that's fine, since the usage of a range is more to provide a sense of how much time has passed or remains rather than to provide precision - if you want to do that, just output the date. PHP Date and Time Functions Much of this article will work with Unix time, or POSIX or epoch time as it is otherwise known. If the separator is a dash - and year is given in a two digit format, the date string is parsed as y-m-d. This tutorial uses PHP and functions to convert date time format. UTC 西边的时区偏移量总是负的,UTC 东边的时区偏移量总是正的。 The offset for timezones west of UTC is always negative, and for those east of UTC is always positive. The PHP time Function The time function is used to get the current time as a Unix timestamp the number of seconds since the beginning of the Unix epoch: January 1 1970 00:00:00 GMT. PHP date 函数 PHP date 函数可把时间戳格式化为可读性更好的日期和时间。

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Note that you should escape any other characters, as any which currently have a special meaning will produce undesirable results, and other characters may be assigned meaning in future PHP versions. Despite all that, I've decided to address the complaints. - Return current Unix timestamp• Note that 3 days may be a lot if you want to create invoices and have to check against a given age to determine if the customer is chargable for taxes and so on. "skip July 4th in any year, skip the first Monday in September in any year". Creating Unix Time from a Given Time mktime is used to create a Unix timestamp given a list of values that correspond to each part of a date seconds, minutes, hours, year, etc. This is very good for SEO especially search engines like Google. After that reconstruct date to any format using date function. the century is divisible by 4 but not by 10. Getting the Current Unix Time time takes no arguments and returns the number of seconds since the Unix epoch. - Returns new DateTimeImmutable object• One important thing you should remember is that the timestamp value returned by time is time-zone agnostic and gets the number of seconds since 1 January 1970 at 00:00:00 UTC. Sean has a degree in Computer Science, and when not doing things related to that, he enjoys brewing beer, making coffee, growing hops, cooking, disc golf, mowing his lawn, and playing guitar or bass as the situation may warrant. m - 代表月 01 - 12• If it is within the first 100000 microseconds then the string will be less than 6 characters, so 0. So do not expect the public date property to be returned format mask applied based on the current public timezone property. 可以和 j 一起用 w 星期中的第几天,数字表示 0(表示星期天)到 6(表示星期六) z 年份中的第几天 0 到 365 星期 --- --- W ISO-8601 格式年份中的第几周,每周从星期一开始(PHP 4. Calculate the number of days between two dates in PHP Method 1 First we will convert start date and end date into to unix timestamps using strtotime function, then substract end date to start date then it will give you the difference in seconds, which you divide by 86400 total seconds in a day to give you an approximate total of days in that range. The abs function returns the absolute positive value of a number. This is because the Julian calendar from which the Easter date is calculated deviates from the Gregorian by one day for each century-year that is NOT a leap-year, i. timestamp 可选。 Be careful, the behaviour depends on the time zones in a weird way. So be careful when using this output with something important i know projects where this was used to form MySQL partitions. To do this, simply use the 'l' lowercase 'L' character with your timestamp, as in the following example, which displays the day that falls on April 1, 2014:. Why would we want it formatted right out of the database anyway? php echo "Today is Sun 2 Oct 2016, day " , date 'w' , strtotime '2016-10-02' , " of this week. Using 'mktime': This version is more of a hassle but works on any PHP version. 0, Copyright c 1998-2013 Zend Technologies with Xdebug v2. Convert the datetime into time-stamps, then subtract normally, then convert the seconds to whatever you want. In this article we will explain how to calculate the number of days between two dates in PHP. The strtotime function is a built-in function in PHP which is used to convert an English textual date-time description to a UNIX timestamp. Works well with j w Numeric representation of the day of the week 0 for Sunday through 6 for Saturday z The day of the year starting from 0 0 through 365 Week --- --- W ISO-8601 week number of year, weeks starting on Monday Example: 42 the 42nd week in the year Month --- --- F A full textual representation of a month, such as January or March January through December m Numeric representation of a month, with leading zeros 01 through 12 M A short textual representation of a month, three letters Jan through Dec n Numeric representation of a month, without leading zeros 1 through 12 t Number of days in the given month 28 through 31 Year --- --- L Whether it's a leap year 1 if it is a leap year, 0 otherwise. 该参考手册提供了每个函数的简要描述和应用实例!. It serves the purpose of highlighting what you can do. Note: You can leave out as many arguments as you like, and the value corresponding to the current time will be used instead. - Gets time of last page modification• SHOULD be rolled over to the next month: '. We may have a few different transformations and formats we want to apply to it. You can access the individual day, month and year values by accessing directly the elements of array, or assign them to variables. The computer stores dates and times in a format called UNIX Timestamp, which measures time as a number of seconds since the beginning of the Unix epoch midnight Greenwich Mean Time on January 1, 1970 i. For up to date solution see jurka's answer below You can use strtotime to convert two dates to unix time and then calculate the number of seconds between them. 0 新加) 1(表示星期一)到 7(表示星期天) S 每月天数后面的英文后缀,2 个字符 st, nd, rd 或者 th。

Y - Represent year in four digits 2008 or 2014 The parts of the date can be separated by inserting other characters, like hyphens - , dots. Z 时差偏移量的秒数。 Note: Since this function only accepts int timestamps the u format character is only useful when using the function with user based timestamps created with. It seems as though the T token is a little greedy with surrounding parentheses, so don't include them in your format string. In the old Julian reckoning, EVERY 4th year was a leap-year. Things to be aware of when using week numbers with years. 示例: 654321 时区 --- --- e 时区标识(PHP 5. From this it's rather easy to calculate different time periods. Store dates as Unix timestamps. 规定时间戳。

You will have to restart Apache or the CLI shell to see the changes. Since this is an impractical format for humans to read, PHP converts a timestamp to a format that is readable to humans and dates from your notation into a timestamp the computer understands. The PHP Date Function The PHP date function convert a timestamp to a more readable date and time. If the character with a backslash is already a special sequence, you may need to also escape the backslash. H - Represent hour in in 24-hour format with leading zeros 00 to 23• My code is generally only recommended if you don't have PHP 5. Ported to PHP by Emil H, 2011-05-02. I hope you could help me on this Paul? 2 and lower not supporting this function, I was unable to find any solid examples to get around it. a - Represent lowercase ante meridiem and post meridiem am or pm• There are many different way to find the number of days between two dates in PHP. 2 新加)。 January 1, 1970 00:00:00 GMT. Working almost identical to date function only as a supplement has the time zone option. Seems like datetime::format does not really support microseconds as the documentation under date suggest it will. Similarly you can use the following characters to format the time string:• So this function is not available for my server's PHP. For each holiday between the start and end dates that isn't a Saturday or a Sunday, remove one day. Examples: 1999 or 2003 Y A full numeric representation of a year, 4 digits Examples: 1999 or 2003 y A two digit representation of a year Examples: 99 or 03 Time --- --- a Lowercase Ante meridiem and Post meridiem am or pm A Uppercase Ante meridiem and Post meridiem AM or PM B Swatch Internet time 000 through 999 g 12-hour format of an hour without leading zeros 1 through 12 G 24-hour format of an hour without leading zeros 0 through 23 h 12-hour format of an hour with leading zeros 01 through 12 H 24-hour format of an hour with leading zeros 00 through 23 i Minutes with leading zeros 00 to 59 s Seconds with leading zeros 00 through 59 u Microseconds. d - 代表月中的天 01 - 31• php echo date DateTime :: ISO8601 ;? Conclusion: "Now" is "Today", but in a different clock time, but still the same day! This is a direct port of the code that PHP uses internally to calculate ranges, with the exception that it doesn't take daylight savings time into account. I just found a subtle bug in my code because it was comparing a date against an uninitialised variable. If there are two main points to take away from the article, they would be to 1 stick with Unix time and 2 stick with UTC as the base time zone for all dates when working with PHP and MySQL. 21 2016-10-21 格式字串可以识别以下 format 参数的字符串 format 字符 说明 返回值例子 日 --- --- d 月份中的第几天,有前导零的 2 位数字 01 到 31 D 星期中的第几天,文本表示,3 个字母 Mon 到 Sun j 月份中的第几天,没有前导零 1 到 31 l("L"的小写字母) 星期几,完整的文本格式 Sunday 到 Saturday N ISO-8601 格式数字表示的星期中的第几天(PHP 5. I want to check if today fits between two dates.。

That means that it's off by an hour at most, but except for that it should be correct. So how do you deal with dates and time zones with PHP and MySQL? 3, Copyright c 2002-2013, by Derick Rethans with Zend OPcache v7. UTC, also know by its full name Coordinated Universal Time, also referred to as GMT, and sometimes Zulu time, is the time at 0-degrees longitude. Day 1 of next week is 10 Oct 2016 Today is Sun 2 Oct 2016, day 7 of this week. It's not clear whether the truncation happens when getting the DateTime objects' values, during the calculation, or immediately before returning the result. The udate function is a great start, but the formatting of the milliseconds is a little off. 这里列出了一些可用的字符:• The Z format will always return 0 when using. Day 1 of next week is 03 Oct 2016 Most spreadsheet programs have a rather nice little built-in function called NETWORKDAYS to calculate the number of business days i. But that's a project for another time. I don't want a default timezone, each user has their timezone stored in the database, I take that timezone of the user and use it. Below is few examples of conversion: 1. It looks and smells like a date, and if you said it was a date then you would be right. " ; echo "Day " , date 'w' , strtotime '2016-10-02 Monday next week' , " of next week is " , date 'd M Y' , strtotime '2016-10-02 Monday next week' ;? Be careful when using the difference between 'Now' and a future value. M - Represent month in text, abbreviated Jan to Dec• The syntax of the PHP date function can be given with. Treating time in UTC and Unix time will make your life easier when you need to deal with time zones. The following characters are recognized in the format parameter string format character Description Example returned values Day --- --- d Day of the month, 2 digits with leading zeros 01 to 31 D A textual representation of a day, three letters Mon through Sun j Day of the month without leading zeros 1 to 31 l lowercase 'L' A full textual representation of the day of the week Sunday through Saturday N ISO-8601 numeric representation of the day of the week 1 for Monday through 7 for Sunday S English ordinal suffix for the day of the month, 2 characters st, nd, rd or th. I want to calculate the difference between two dates from MySQL and display the output from PHP. See Also• Sean Hudgston is well-balanced fellow who lives and works as a software engineer in Syracuse, NY. m - Represent month in numbers with leading zeros 01 or 12• DateTime objects also come with a few useful constants that can be fed to the format method. Note that will always generate 000000 since it takes an int parameter, whereas DateTime::format does support microseconds if was created with microseconds. If you have a problem with the different time zone, this is the solution for that. This has the same value as Y, except that if the ISO week number W belongs to the previous or next year, that year is used instead. Using a datetime field from a mysql database e. 需要注意的是 date 函数总是返回 000000 因为它只接受 integer 参数, 而 DateTime::format 才支持毫秒。

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