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How rand() function works in php?

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How rand() function works in php?
posted Jun 19, 2014 by Amanpreet Kaur

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3 Answers

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This function used to generate random number.
Please get below example:

<!DOCTYPE html>
<html>
<body>

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

</body>
</html>

Output:

34444
45666
38
answer Jun 19, 2014 by Amit Kumar Pandey
0 votes

rand is used to get the random number in PHP.

Syntax 

int rand ( void )
int rand ( int $min , int $max )  // a random number between min and max (inclusive)

But I would suggest to try my_rand, mt_rand uses the Mersenne Twister algorithm, which is far better than the LCG typically used by rand. For example, the period of an LCG is a measly 2^32, whereas the period of mt_rand is 2^19937 − 1. Speed of mt_rand is also better then rand (syntax is same).

answer Jun 19, 2014 by Salil Agrawal
0 votes

It is used to generate random numbers.If called without the arguments it returns a pseudo-random integer between 0 and getrandmax(). If you want a random number between 6 and 12 (inclusive), for example, use rand(6, 12).This function does not generate cryptographically safe values, and should not be used for cryptographic uses. If you want a cryptographically secure value, consider using openssl_random_pseudo_bytes() instead.

answer Jun 20, 2014 by Mohit Sharma
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