Curriculum

PHP Basic

PHP Intro

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PHP Install

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PHP Syntax

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PHP Comments

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PHP Variables

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PHP echo / print

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PHP Data Types

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PHP Strings

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PHP Numbers

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PHP Casting

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PHP Math

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PHP Constants

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PHP Magic Constants

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PHP Operators

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PHP if...Else...Elseif

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PHP switch

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PHP Loops

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PHP Functions

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PHP Arrays

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PHP Superglobals

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PHP RegEx

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PHP Form

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PHP Advanced

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PHP OOP

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MySQL Database

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PHP XML

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PHP Reference

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Text lesson

microtime()

Example

Returns the current Unix timestamp with microseconds.

<?php
echo(microtime());
?>

Definition and Usage

The microtime() function provides the current Unix timestamp with microseconds.

Syntax

microtime(return_float);

Parameter Values

Parameter	Description
return_float	Optional. When set to TRUE, it specifies that the function should return a float instead of a string. The default is FALSE.

Technical Details

Return Value:	By default, returns a string in the format “microsec sec,” where `sec` represents the number of seconds since the Unix Epoch (00:00:00 January 1, 1970 GMT) and `microsec` represents the microseconds. If the `return_float` parameter is set to `TRUE`, it returns a float representing the current time in seconds since the Unix Epoch, accurate to the nearest microsecond.
PHP Version:	4+
PHP Changelog:	PHP 5.0: Introduced the `return_float` parameter.