How to get random numbers by PHP

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Function:

Get a random string

PHP gets the parameters of a random number:

1. (int) $length = 32 # random character length

2. (int) $mode = 0 # random character type, 0 for uppercase and lowercase letters and numbers, 1 for numbers, 2 for lowercase letters, 3 for uppercase letters, 4 for uppercase and lowercase letters, 5 for uppercase letters and numbers, 6 for lowercase letters and numbers

PHP gets the random number definition class code

< ?php class getRandstrClass { function getCode ($length = 32, $mode = 0) { switch ($mode) { case '1': $str = '1234567890'; break; case '2': $str = 'abcdefghijklmnopqrstuvwxyz'; break; case '3': $str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'; break; case '4': $str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZa bcdefghijklmnopqrstuvwxyz';break; case '5': $str = 'ABCDEFGHIJKLMNOPQRSTUVWXY Z1234567890'; break; case '6': $str = 'abcdefghijklmnopqrstuvwxyz 1234567890'; break; default: $str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZa bcdefghijklmnopqrstuvwxyz1234567890'; break; } $randString = ''; $len = strlen($str)-1; for($i = 0;$i < $length;$i ++){ $num = mt_rand(0, $len); $randString .= $str[$num]; } return $randString ; } } ?>

Instructions for using PHP to get random numbers:

1. Save the above code as random.php

two。 Introduce random.php on the page you need

< ?php require_once('random.php'); ?>

3. Use the previously defined class

< ?php $code = new getRandstrClass(); $length = 32; $mode = 0; $str = $code->

GetCode ($length, $mode); echo $str;? > Thank you for reading! This is the end of the article on "how to get random numbers in PHP". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it for more people to see!