Let’s talk about the conversion between php timestamp and specific time format

PHP is a widely used open source server-side scripting language. It has many convenient functions and methods that can easily perform various calculations and processing. Among them, timestamp is a very commonly used time representation method. It represents the number of seconds from 00:00:00 on January 1, 1970 to the present. In PHP, we can easily convert between timestamps and specific times.

1. Convert time into timestamp

In PHP, we can use the time() function to convert the current time into a timestamp. This function has no parameters and can be called directly. The code is as follows:

$timestamp = time();
echo $timestamp;

The result output by the above code is the timestamp of the current time.

We can also use the strtotime() function to convert a specific time into a timestamp. This function accepts a time string as a parameter and returns the timestamp of that time. The code is as follows:

$time = "2021-06-10 12:30:00";
$timestamp = strtotime($time);
echo $timestamp;

The result output by the above code is the timestamp of 2021-06-10 12:30:00.

2. Convert the timestamp into time

In PHP, we can use the date() function to convert the timestamp into a specific time. This function has two parameters, the first parameter is the time format, and the second parameter is the timestamp. The code is as follows:

$timestamp = time();
$time = date("Y-m-d H:i:s", $timestamp);
echo $time;

The result output by the above code is the specific time format of the current time.

3. Convert the timestamp into a more readable time

In actual development, we often need to convert the timestamp into a more readable time, such as "just now" ”, “1 hour ago”, etc. This function can be achieved through some simple calculations and judgments in PHP.

First, we define a function that accepts a timestamp as a parameter and returns a more readable time. The code is as follows:

function get_time_diff($timestamp){
    $current_time = time();
    $time_diff = $current_time - $timestamp;
    if($time_diff < 60){
        return "刚刚";
    }else if($time_diff < 3600){
        return floor($time_diff/60)."分钟前";
    }else if($time_diff < 86400){
        return floor($time_diff/3600)."小时前";
    }else{
        return date("Y-m-d H:i:s", $timestamp);
    }
}

In the above code, we first calculate the time difference between the current time and the given timestamp, and then use some conditional statements to determine what result to return.

Next, we call this function and pass in a timestamp parameter to test. The code is as follows:

$timestamp = time() - 3600;
echo get_time_diff($timestamp);

The output result of the above code is "1 hour ago".

4. Summary

The above is the method of converting timestamps in PHP. The specific time is converted into a timestamp through the time() function and strtotime() function, and the date() function is used to convert the specific time into a timestamp. Convert the timestamp into a specific time, and use a custom function to convert the timestamp into a more readable time. In actual development, we can choose different methods for conversion according to needs.

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