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PHP rand () function

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Examples

Generates a random number:

<?php
echo(rand() . "<br>");
echo(rand() . "<br>");
echo(rand(10,100));
?>

Running instance »

Definition and Usage

rand () function generates a random integer.

Tip: If you want a between 10 and 100 (including 10 and 100) of the random integer, use rand (10,100).

Tip: mt_rand () function is a better choice for generating random values, returning a result the speed of rand () 4 times function.

grammar

rand();

or

rand( min,max );

参数 描述
min 可选。规定返回的最小数。默认是 0。
max 可选。规定返回的最大数。默认是 getrandmax()

technical details

return value: Between min (or 0) and max (or mt_getrandmax ()) (inclusive) between the random integer.
Return type: Integer
PHP version: 4+
PHP Update Log: PHP 4.2.0: random number generator is automatically seeded.


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