This article mainly introduces the implementation method of PHP real-time countdown function, and analyzes the specific steps and related operation skills of PHP combined with the timestamp operation of front-end JS to implement the countdown function based on specific examples. Friends who need it can refer to it

The example in this article describes the implementation method of PHP real-time countdown function. I would like to share it with you for your reference. The details are as follows:

In the past few days, the company is going to have a limited time shopping function. This requires a countdown and a real-time countdown.

Requirements:

1) There must be a real-time countdown display of hours, minutes and seconds
2) Modifying the date and time on the client side will not affect the normal display of the countdown (that is, based on the server time)

In fact, this has the same requirements as the time limit function of many examination and other systems.

Solution ideas:

1) You cannot always use ajax every time Get the server time every second.

So the real-time countdown must be implemented with javascript. This is very simple. There are a lot of examples on the Internet.

2) The current problem is to solve the problem of modifying the date and time on the client side. Impact on our display.
The solution is to calculate the time difference between the client's time and the server's time. In this way, the problem is solved.

In this way, you only need to run php once. The real-time countdown time is equal to The time of the server is synchronized. The theory is that it is synchronized, but in actual testing there will be an error of 1 second. (The specific reason is related to the network speed. The faster the network speed, the smaller the error), but this is definitely the case. It will not affect our above requirements.

Code:

XX:XX:XX

Modified some of the above bugs

Code:

XX:XX:XX

The idea is different, much simpler.

Code:

XX:XX:XX

The above is The entire content of this article is hoped to be helpful to everyone's study.

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