In PHP, you can use the date() function to convert the value returned by time() into a date string format, with the syntax "date("Y-m-d H:i:s",time())". time() will return a timestamp representing the current time, while date() can format the timestamp and return a formatted date string.
The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer
php will obtain time() Convert the value to string form
In php, you can use the date() function to convert the value returned by time() to string form.
<?php
header("Content-type:text/html;charset=utf-8");
ini_set('date.timezone', 'Asia/Shanghai');//设置时区
echo "当前是：".date("Y-m-d H:i:s",time());
?>
Description: The
time() function returns the Unix epoch since January 1 1970 00:00:00 GMT The number of seconds of the current time.
date() function formats local date and time and returns the formatted date string. The syntax is as follows:
date(format,timestamp);
##Parameter | Description |
| format
|
Required. Specifies the format of the output date string. The following characters are available:
d - day of the month (from 01 to 31) - D - textual representation of the day of the week (in three letters)
- j - Day of the month without leading zeros (1 to 31)
- l (lowercase 'L') - Full textual representation of the day of the week
-
N - The day of the week in ISO-8601 numeric format (1 means Monday, 7 means Sunday) - S - The English ordinal suffix of the day of the month ( 2 characters: st, nd, rd, or th. Used with j)
- w - Numeric representation of the day of the week (0 for Sunday, 6 for Saturday)
- z - Day of the year (from 0 to 365)
- W - Day of the year in ISO-8601 number format (week starts on Monday)
- F - Full textual representation of the month (January to December)
- m - Numerical representation of the month (from 01 to 12)
- M - short text representation of the month (in three letters)
- n - numeric representation of the month without leading zeros (1 to 12)
- t - the number contained in the given month Number of days
- L - Whether it is a leap year (1 if it is a leap year, 0 otherwise)
- o - Year number under the ISO-8601 standard
- Y - Year number Four-digit representation of
- y - Two-digit representation of year
- a - Lowercase representation: am or pm
- A - Uppercase representation: AM or PM
- B - Swatch Internet Time (000 to 999)
- g - 12 hour clock without leading zeros (1 to 12)
- G - 24 hour clock without leading zeros Zeros (0 to 23)
- h - 12-hour clock, with leading zeros (01 to 12)
- H - 24-hour clock, with leading zeros (00 to 23)
- i - Minutes, with leading zeros (00 to 59)
- s - Seconds, with leading zeros (00 to 59)
- u - Microseconds (new in PHP 5.2.2 )
- e - Time zone identifier (e.g. UTC, GMT, Atlantic/Azores)
- I (uppercase i) - Whether the date is in daylight saving time (if so then is 1, otherwise 0)
- O - The difference in Greenwich Mean Time (GMT) in hours (Example: 0100)
- P - The difference in Greenwich Mean Time (GMT) Difference, unit is hours:minutes (new in PHP 5.1.3)
- T - abbreviation of time zone (examples: EST, MDT)
- Z - time zone in seconds Offset. Negative time zone offsets west of UTC (-43200 to 50400)
- c - ISO-8601 standard dates (e.g. 2013-05-05T16:34:42 00:00)
- r - A date in RFC 2822 format (e.g. Fri, 12 Apr 2013 12:01:05 0200)
- U - The number of seconds elapsed since the Unix epoch (January 1 1970 00:00:00 GMT)
-
Also, you can also use the following predefined constants (available starting from PHP 5.1.0):
DATE_ATOM - Atom (for example: 2013-04-12T15:52:01 00:00) - DATE_COOKIE - HTTP Cookies (Example: Friday, 12-Apr-13 15:52:01 UTC)
- DATE_ISO8601 - ISO-8601 (Example: 2013-04-12T15 :52:01 0000)
- DATE_RFC822 - RFC 822 (Example: Friday, 12 Apr 13 15:52:01 0000)
- DATE_RFC850 - RFC 850 (Example: Friday, 12-Apr- 13 15:52:01 UTC)
- DATE_RFC1036 - RFC 1036 (Example: Fri, 12 Apr 13 15:52:01 0000)
- DATE_RFC1123 - RFC 1123 (Example: Fri, 12 Apr 2013 15:52:01 0000)
- DATE_RFC2822 - RFC 2822 (Fri, 12 Apr 2013 15:52:01 0000)
- DATE_RFC3339 - Same as DATE_ATOM (as of PHP 5.1.3)
- DATE_RSS - RSS (Fri, 12 Aug 2013 15:52:01 0000)
- DATE_W3C - World Wide Web Consortium (Example: 2013-04-12T15:52:01 00:00)
-
|
| timestamp
| Optional. Specifies an integer Unix timestamp. The default is the current local time (time()). |
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