Hrtime()

In this article, we will focus on the PHP hrtime() function. We will provide you with an overview of the function, how it works, and examples of its use.

Introduction to the hrtime() function

The hrtime() function is a built-in function in PHP 7.3 and later versions that is used to measure the high-resolution time of an operation. It is a powerful tool that can be used to benchmark the performance of PHP scripts and functions.

The hrtime() function returns an array of two integers that represent the high-resolution time of the operation in nanoseconds. The first integer represents the number of seconds, while the second integer represents the number of nanoseconds that have elapsed since the last second.

How to use the hrtime() function

Using the hrtime() function is very simple. You just need to call the function and it will return an array of two integers that represent the high-resolution time of the operation in nanoseconds. Here is an example:

<?php
$start = hrtime(true);
// Code to be benchmarked
$end = hrtime(true);
$time = ($end - $start) / 1e6;
echo "Execution time: $time milliseconds";
?>

In this example, we have a variable $start that contains the high-resolution time of the start of the operation. We then execute the code to be benchmarked, and store the high-resolution time of the end of the operation in the variable $end. We then calculate the elapsed time in milliseconds by subtracting $start from $end and dividing by 1 million. Finally, we print out the execution time in milliseconds.

Conclusion

In conclusion, the hrtime() function is a powerful tool for measuring the high-resolution time of PHP operations. By understanding how to use the function and how to calculate the elapsed time, you can take advantage of this feature to benchmark the performance of your PHP scripts and functions.