PHP srand() Function
Definition and Usage
The srand() function seeds the random number generator seed.
Syntax
srand(seed)
| Parameters | Description |
|---|---|
| seed | Optional. Use seed to seed the random number generator seed. |
Description
Starting from PHP 4.2.0 versionseed Parameters become optional, when this item is empty, it will be set to the current time.
Tips and Comments
Note：Since PHP 4.2.0, srand() or mt_srand() The function seeds the random number generator, now it is automatically completed.
Example
In this example, we will seed the random number generator：
<?php srand(mktime()); echo(rand()); ?>
Output：
23054
