php convert timestamp to date time format

In PHP, the timestamp can be converted to date time format by using the date() function, such as "2023-03-08 12:34:56". This function accepts a timestamp and a format string as parameters. For example: $formatted_date = date("Y-m-d H:i:s", $timestamp);. Conversions can also be performed using the gmdate() and strtotime() functions, for GMT-based datetime generation and datetime string to timestamp conversion respectively.

Convert timestamp to datetime format in PHP

Introduction

In PHP, a timestamp is an integer representing the number of seconds since January 1, 1970. Sometimes it is necessary to convert the timestamp into a human-readable date-time format, such as "2023-03-08 12:34:56".

Using PHP functions

PHP provides multiple functions for timestamp conversion:

• date() - Convert the timestamp to a datetime string in the specified format.
• gmdate() - Similar to date(), but generates a date-time string based on Greenwich Mean Time (GMT).
• strtotime() - Converts a datetime string to a timestamp.

Practical case

Suppose you have a timestamp $timestamp, representing 12:34:56 on March 8, 2023 .

Use date()

Use the date() function to convert the timestamp to "Y-m-d H:i: s" format date and time string:

$formatted_date = date("Y-m-d H:i:s", $timestamp);
echo $formatted_date; // 输出: 2023-03-08 12:34:56

Use gmdate()

Use gmdate() function to Convert the timestamp to a date-time string in GMT-based "Y-m-d H:i:s" format:

$formatted_date = gmdate("Y-m-d H:i:s", $timestamp);
echo $formatted_date; // 输出: 2023-03-08 04:34:56

Use strtotime()

If you have a datetime string and need to convert it to a timestamp, you can use the strtotime() function:

$timestamp = strtotime("2023-03-08 12:34:56");
echo $timestamp; // 输出: 1678291696

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