How to convert time to timestamp through PHP code

Time conversion is a very important part of any programming language, especially in PHP. In PHP, we can use timestamp to represent time and date because it is a number of seconds since Unix time (January 1, 1970). In this article, we will introduce how to convert time into timestamp through PHP code.

First of all, we need to know the basic format of time. PHP's time format complies with the ISO 8601 standard, such as "Y-m-d H:i:s", where "Y" represents the year, "m" represents the month, "d" represents the date, "H" represents the hour, and "i" represents the minute. "s" represents the number of seconds. So, if we want to convert the time of 12:30:00 on August 10, 2021 into a timestamp, we only need to use the following code:

$date_string = "2021-08-10 12:30:00";
$timestamp = strtotime($date_string);
echo $timestamp;

The output should be 1628595000, which is our time stamp. The strtotime() function receives a datetime string as input and converts it to a Unix timestamp.

In addition, PHP also provides some other functions, such as the mktime() and gmmktime() functions, which can convert the specified time and date into a timestamp. The arguments to these functions include year, month, date, hour, minutes, and seconds. We can replace the above example code with the following code:

$timestamp = mktime(12, 30, 0, 8, 10, 2021);
echo $timestamp;

The output result is the same 1628595000.

In addition to the strtotime() and mktime() functions, there is also a date_parse() function that can be used to parse date and time strings and return structured information. The following is a sample code using the date_parse() function:

$date_string = "2021-08-10 12:30:00";
$parsed_date = date_parse($date_string);
print_r($parsed_date);

The output result will be:

Array
(
    [year] => 2021
    [month] => 8
    [day] => 10
    [hour] => 12
    [minute] => 30
    [second] => 0
    [fraction] => 
    [warning_count] => 0
    [warnings] => Array()
    [error_count] => 0
    [errors] => Array()
    [is_localtime] => 
)

In this way, we can easily convert the time to a timestamp or perform some other types processed.

The above is how to convert time into timestamp in PHP. We can use the functions provided by PHP to quickly implement this process. Whether you need an experienced PHP developer for your own project or you just want to pick up some basic programming skills, converting time to timestamp in PHP is a very useful skill.

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