DateFormat PHP Class (php 处理日期)php rtrim
代码：
<?php class FormatDate { var $theTime; function FormatDate($string) { //Set constructor $this->theTime = $string; } //Returns numerical day function Day() { return date("j", $this->theTime); } //Returns weekday function WeekDay() { return date("l", $this->theTime); } //Returns full month function Month() { return date("F", $this->theTime); } //Returns short-hand month function MonthShort() { return date("M", $this->theTime); } //Numeric for month function MonthNum() { return date("n", $this->theTime); } //Full 4 digit year function YearFull() { return date("Y", $this->theTime); } //Short 2 digit year function Year() { return date("y", $this->theTime); } //24 Hr with Seconds function MilitaryFull() { return date("G:i:s", $this->theTime); } //24 Hr without Seconds function Military() { return date("G:i", $this->theTime); } //Standard with seconds function StandardFull() { return date("g:i:s a", $this->theTime); } //Standard without seconds function Standard() { return date("g:i a", $this->theTime); } //Date & Month & Year Full function TextDate() { $string = $this->Month()." ".$this->Day()." ".$this->YearFull(); return $string; } //Date & Month & Year Shorthand function TextDateShort(){ $string = $this->MonthShort()." ".$this->Day()." ".$this->Year(); return $string; } //Numerical Date & Month & Year function NumDate() { $string = $this->MonthNum()."/".$this->Day()."/".$this->YearFull(); return $string; } //Numerical Date & Month & Year Shorthand function NumDateShort() { $string = $this->MonthNum()."/".$this->Day()."/".$this->Year(); return $string; } //Month & Day Full function MonthDay() { $string = $this->Month()." ".$this->Day(); return $string; } //Month & Day Short function MonthDayShort(){ $string = $this->MonthShort()." ".$this->Day(); return $string; } function TimeSince($old_stamp) { $difference = $this->theTime - $old_stamp; $loop = true; while($loop) { if(round($difference/3153600, 2) >= 1) { return "Over a year..."; } elseif(round($difference/2592000, 2) >= 2) { return "Over ".round($difference/2592000,0)." months ago..."; } elseif(round($difference/2592000, 2) >= 1.20) { return "Over a month ago..."; } elseif(round($difference/604800, 2) >= 2) { return "Over ".round($difference/604800,0)." weeks ago.."; } elseif(round($difference/604800, 2) >= 1.20) { return "Over a week ago.."; } elseif(round($difference/86400, 2) >= 1.9) { return "Over a few days ago...";} elseif(round($difference/3600, 2) >= 3) { return "Just a few hours ago.."; } elseif(round($difference/3600, 2) >= 8) { return "About half a day ago..."; } elseif(round($difference/3600, 2) < 1) { return "Less than an hour ago..."; } elseif(round($difference/86400, 2) < 1.9) { return "About a day ago..."; } elseif(round($difference/86400, 2) < 6 ) { return "Less than a week ago..."; } elseif(round($difference/604800, 2) < 1.20) { return "About a week ago.."; } elseif(round($difference/2592000, 2) < 1.20) { return "About a month ago..."; } else{ return "Error"; } $loop = false; } } }实例：
$date = new FormatDate(time()); echo $date->Day().'<br>'; // 2 echo $date->WeekDay().'<br>'; // Tuesday echo $date->Month().'<br>'; // August echo $date->MonthShort().'<br>'; // Aug echo $date->MonthNum().'<br>'; // 8 echo $date->YearFull().'<br>'; // 2011 echo $date->Year().'<br>'; // 11 echo $date->MilitaryFull().'<br>'; // 9:08:40 echo $date->Military().'<br>'; // 9:08 echo $date->StandardFull().'<br>'; // 9:08:40 am echo $date->Standard().'<br>'; // 9:08 am echo $date->TextDate().'<br>'; // August 2 2011 echo $date->TextDateShort().'<br>'; // Aug 2 11 echo $date->NumDate().'<br>'; // 8/2/2011 echo $date->NumDateShort().'<br>'; // 8/2/11 echo $date->MonthDay().'<br>'; // August 2 echo $date->MonthDayShort().'<br>'; // Aug 2 echo $date->TimeSince(time()).'<br>'; // Less than an hour ago...
DateFormat Class Documentation
格式： http://php.net/manual/en/function.date.php
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 (added in PHP 5.1.0)
1 (for Monday) through 7 (for Sunday)
S
English ordinal suffix for the day of the month, 2 characters
st , nd , rd or th . 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 (added in PHP 4.1.0)
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.
o
ISO-8601 year number. 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. (added in PHP 5.1.0)
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 (added in PHP 5.2.2)
Example: 654321
Timezone
---
---
e
Timezone identifier (added in PHP 5.1.0)
Examples: UTC , GMT , Atlantic/Azores
I (capital i)
Whether or not the date is in daylight saving time
1 if Daylight Saving Time, 0 otherwise.
O
Difference to Greenwich time (GMT) in hours
Example: +0200
P
Difference to Greenwich time (GMT) with colon between hours and minutes (added in PHP 5.1.3)
Example: +02:00
T
Timezone abbreviation
Examples: EST , MDT ...
Z
Timezone offset in seconds. The offset for timezones west of UTC is always negative, and for those east of UTC is always positive.
-43200 through 50400
Full Date/Time
---
---
c
ISO 8601 date (added in PHP 5)
2004-02-12T15:19:21+00:00
r
» RFC 2822 formatted date
Example: Thu, 21 Dec 2000 16:01:07 +0200
U
Seconds since the Unix Epoch (January 1 1970 00:00:00 GMT)
See also time()
Unrecognized characters in the format string will be printed as-is. The Z format will always return 0 when using gmdate()
Note :
integer timestamps the u format character is only useful when using the date_format() function with user based timestamps created with date_create()
timestamp
The optional timestamp parameter is an integer Unix timestamp that defaults to the current local time if a timestamp is not given. In other words, it defaults to the value of time()
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