Timestamp used as the basis for calculating relative dates. The strptime function can be used to analyze and extract parts of a date in a specific format. Here is a short example getDate() This function returns the date/time information of the past parameter (date/time). Syntax The valid range of a timestamp usually goes from Fri, 13 Dec 1901 20:45:54 UTC to Tue, 19 Jan 2038 03:14:07 UTC. (These are the dates that correspond to the minimum and maximum values of a signed 32-bit integer.) Dates in m/d/y or d-m-y format are disambiguated by looking at the separator between the different components: if the delimiter is a forward slash (/), the American m/d/y is assumed; If the delimiter is a hyphen (-) or a period (.), the European format d-m-y is assumed. However, if the year is specified in a two-digit format and the delimiter is a hyphen (-), the date string is parsed as y-m-d. If strptime does not scan the date (which would happen if the entry date is incorrect), it would return false. This can be used to check whether the date entered by the user is a valid date or not. The format used by strptime to specify the date format is similar to the format used by strftime and is different from the format used by the date() function.

DateTime::createFromFormat — date_create_from_format — Parses a time chain in a specified format To include literal characters in the format, you must hide them with a backslash (). The timezone parameter and the current time zone are ignored if the datetime parameter contains a UNIX timestamp (e.B. 946684800) or a time zone (e.B. 2010-01-28T15:00:00+02:00). strtotime — Analyze any English text description of datetime in a Unix timestamp You can also use mysqls date_format to format your date as needed, tm_mday is the day of the date, tm_mon is the month of the date and tm_year is the year of the date minus 1900. So, to form our date in the standard format, just reconnect them. checkdate takes years between 1 and 32767. However, the above approach is problematic. It is assumed that the date format is d-m-Y. The format may vary depending on the user`s choices. For the avoidance of doubt, use iso 8601 (YYYY-MM-DD) or DateTime::createFromFormat() if possible.

Each parameter in this function uses the default time zone, unless a time zone is specified in this parameter. Be careful not to use different time zones in each setting unless provided. See date_default_timezone_get() for different ways to set the default time zone. For an application to properly parse a date, it is important to know in what format the user enters the date. Most good apps give the user a configuration option to select a format to use. Here are some common examples The strtotime() function analyzes an English datetime text in a Unix timestamp (the number of seconds since January 1, 1970 00:00:00 GMT). The checkdate function also supports leap years. Here is a short php 5.3 example up there is a useful class called DateTime which has a createFromFormat function that can be used to parse dates. It has a simpler syntax.

Note: Look for dates in the format m/d/y or d-m-y. If the delimiter is a forward slash (/), the American m/d/y is assumed. If the delimiter is a hyphen (-) or a period (.), the European format d-m-y is assumed. To avoid possible errors, you should use YYYY-MM DD or date_create_from_format() data whenever possible. If the time zone is omitted or null and datetime does not contain a time zone, the current time zone is used. Parameter The parameter is optional because it uses the current local time as the default setting. Return Type Returns information about date, day, year, month, and so on in a table. Note: If the year is specified in a two-digit format, values between 0 and 69 2000-2069 and values between 70 and 100 are mapped to 1970-2000. If you use strptime to convert a date in the format dd-mm-yy to yy-mm-dd, the code can be: In the example above, the format of the date and date string is provided and strptimes the analysis.

The output would be a table like this When entering dates in forms, 23-02-2010 is the most preferable. The following function converts a date in yy-mm-dd format to dd-mm-yy Characters not recognized in the format string, causing the parsing to fail and an error message to be added to the returned structure. You can query error messages by using DateTime::getLastErrors(). The above function would convert a date in the format dd-mm-y to yy-mm-dd. But a small problem with checkdate is that it reports a date like 01-01-2500 to be valid again (which is how checkdate should do). Returns an associative array with detailed information about a specific date/time. The Unix timestamp returned by this function does not contain time zone information. To perform calculations with date/time information, you must use the most powerful DateTimeImmutable.

But the above feature lacks flexibility. For example, it would report 25-5-2012/d-m-Y as invalid because the newly created date would look like 25-05-2012, which would not correspond to 25-5-2012 in comparison to strings. To solve this problem, you need to compare the alternative formats with multiple formats and see if they match a particular format in a particular set. Now $date is ready to be inserted into the mysql database The Mysql database stores dates in y-mm-dd format like 2009-04-15. However, people are more accustomed to formats like dd-mm-y or mm-dd-y (e.B. 21-04-2009). Thus, when users fill out forms, they enter dates in one of the other formats rather than in the YYYY-MM-DD format. It is the responsibility of the application to convert the date to ISO format and save it correctly. If format the character! , the parts of the generated time that are not specified in the format, as well as the values on the left side of ! to the corresponding values of the Unix era. Most PHP applications need to parse dates and convert them to timestamps, for example. Analysis is also required to convert the date into a standard format such as yy-mm-dd, which can be stored in a database such as mysql. The format in which the transmitted string must exist.

For more information, see the formatting options below. In most cases, the same letters as for the date() can be used. Basically, this is the idea behind data analysis. Now let`s see how this is possible in PHP. Returns a new DateTime object that represents the date and time specified by the datetime string formatted in the specified format. Checking the validity of a date means checking whether the values of the day, month and year are correct or not. The best function to check validity is checkdate. The DateTime class can be used to verify that a date is valid or not.

But there is a twist. The DateTime class would create a valid object with dates such as 2012-08-40. For this data, the created object has a date equal to 40 days after the beginning of the 8th month. So the trick is to convert the date to an object and format it in the same format as specified, then compare the 2 strings. Date/time string. Valid formats are explained in Date and time formats. If the format does not contain the character! then, the parts of the generated time that are not specified in the format are set to the current system time. .