PHP srand() Function
Definition and Usage
The srand() function is used to seed the random number generaror. Seeding initializes the random number generator. Most random number generators need initial seeding. In PHP, use of srand() function is optional as it is done automatically.
This function doen't have any return value.
Syntax
srand ([ int $seed ] ) : void
Parameters
| Sr.No | Parameter & Description |
|---|
| 1 | seed
an integer to be used as seed. If not given, a random number is given
|
Return Values
This function doesn't return any value.
PHP Version
This function is available in PHP versions 4.x, PHP 5.x as well as PHP 7.x.
Example
Live Demo
This example the random number generator is first initialized before employing rand() function−
<?php
srand(5);
echo "rand(1,100)=", rand(1,100);
?>
Output
This may produce following result −
rand(1,100)=12
Example
Live Demo
Following example uses current timestamp to initialize random number generator−
<?php
srand(time());
echo "rand()=", rand();
?>
Output
This may produce following result−
rand()=548287992
Published on 30-Jun-2020 10:59:27
