PHP timer for a javascript function

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I have asetInterval timer and it stores its information into database. Somehow people manage to cheat me. What I need is a PHP function to calculate time since Javascript timer has started and save time in DB? Is that even possible?

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Answer

Solution:

I think you call your PHP script using an Ajax call from setInterval. So you can use in you're ajax complete callback :

var end = new Date().getTime();
var time = end - start; // start is defined before ajax call
console.log('Execution time: ' + time);

If you need to calculate it form server-side, use time() in PHP

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