How to use data to convert PHP time into a readable string format

PHP is a popular back-end programming language, and its time processing function is very powerful. Sometimes we need to convert time from date timestamp format (data) to common time string format. This article will explain how to accomplish this conversion in php.

There are three main date and time classes in PHP: DateTime, DateTimeImmutable and DateTimeZone. In today's article, we will mainly use the DateTime class.

To convert date timestamp (data) into time string, we need to understand two important functions: date() and strtotime(). The date() function is used to format a date timestamp into a time string, while the strtotime() function is used to convert a time string into a date timestamp.

The following is a simple example that demonstrates how to convert a date timestamp into a time string:

$data = 1618745922;
$time = date('Y-m-d H:i:s', $data);
echo $time;

This code will print out the format "2021-04-18 19" on the screen :45:22" time string, where "1618745922" is the date timestamp. We used the date() function in PHP to convert the timestamp into a common time string format.

Next, we will demonstrate how to convert a time string into a date timestamp. This conversion uses the strtotime() function in PHP, as shown below:

$time_str = '2021-04-18 19:45:22';
$data = strtotime($time_str);
echo $data;

This code will display "1618745922" on the screen, which is the date timestamp. In fact, we just used the strtotime() function in PHP to create a date timestamp from a time string.

There are some important considerations to remember when converting a time string to a date timestamp. Some forms of time strings may not be parsed correctly by the strtotime() function. For example, if you use a localized date format in a time string, the strtotime() function may return incorrect results. In this case, you should use the createFromFormat() method of the DateTime class.

This is an example that shows how to use the createFromFormat() method to convert time strings with different formats into date timestamps:

$time_str = '18/04/2021 7:45 PM';
$format = 'd/m/Y g:i A';
$datetime = DateTime::createFromFormat($format, $time_str, new DateTimeZone('UTC'));
$data = $datetime->getTimestamp();
echo $data;

This code will display "1618749920" on the screen , that is, date timestamp. We used the createFromFormat() method of the DateTime class to convert a time string in the format of "18/04/2021 7:45 PM" into a date timestamp.

In summary, PHP is a powerful and flexible programming language that can be used to process date and time data. We can convert date timestamp to time string using date() function in PHP or use strtotime() function to convert time string to date timestamp. When using the strtotime() function, you should pay attention to some formatting issues, or consider using the createFromFormat() method of the DateTime class. Hope this article helps you better manage and convert time data in PHP.

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