microtime

(PHP 4, PHP 5, PHP 7, PHP 8)

microtimeReturn current Unix timestamp with microseconds

Description

microtime(bool $as_float = false): string|float

microtime() returns the current Unix timestamp with microseconds. This function is only available on operating systems that support the gettimeofday() system call.

For performance measurements, using hrtime() is recommended.

Parameters

as_float

If used and set to true, microtime() will return a float instead of a string, as described in the return values section below.

Return Values

By default, microtime() returns a string in the form "msec sec", where sec is the number of seconds since the Unix epoch (0:00:00 January 1,1970 GMT), and msec measures microseconds that have elapsed since sec and is also expressed in seconds.

If as_float is set to true, then microtime() returns a float, which represents the current time in seconds since the Unix epoch accurate to the nearest microsecond.

Examples

Example #1 Timing script execution

<?php
$time_start 
microtime(true);

// Sleep for a while
usleep(100);

$time_end microtime(true);
$time $time_end $time_start;

echo 
"Did nothing in $time seconds\n";
?>

Example #2 microtime() and REQUEST_TIME_FLOAT

<?php
// Randomize sleeping time
usleep(mt_rand(10010000));

// REQUEST_TIME_FLOAT is available in the $_SERVER superglobal array.
// It contains the timestamp of the start of the request with microsecond precision.
$time microtime(true) - $_SERVER["REQUEST_TIME_FLOAT"];

echo 
"Did nothing in $time seconds\n";
?>

See Also

  • time() - Return current Unix timestamp
  • hrtime() - Get the system's high resolution time

Here you can write a comment


Please enter at least 10 characters.
Loading... Please wait.
* Pflichtangabe
There are no comments available yet.

PHP cURL Tutorial: Using cURL to Make HTTP Requests

cURL is a powerful PHP extension that allows you to communicate with different servers using various protocols, including HTTP, HTTPS, FTP, and more. ...

TheMax

Autor : TheMax
Category: PHP-Tutorials

Midjourney Tutorial - Instructions for beginners

There is an informative video about Midjourney, the tool for creating digital images using artificial intelligence, entitled "Midjourney tutorial in German - instructions for beginners" ...

Mike94

Autor : Mike94
Category: KI Tutorials

Basics of views in MySQL

Views in a MySQL database offer the option of creating a virtual table based on the result of an SQL query. This virtual table can be queried like a normal table without changing the underlying data. ...

admin

Autor : admin
Category: mySQL-Tutorials

Publish a tutorial

Share your knowledge with other developers worldwide

Share your knowledge with other developers worldwide

You are a professional in your field and want to share your knowledge, then sign up now and share it with our PHP community

learn more

Publish a tutorial