note 73539 deleted from function.rand by felipe

Note Submitter: www.mrnaz.com 

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This function uses rand() to create a random string of specified length from an optionally supplied string of characters. It is good for generating passwords that only consist of alphanumeric characters or codes that must consist of a defined character space such as for barcodes. It can also be used to generate random hexadecimal numbers for things like encryption keys.

It is very fast, and allows for generation of strings of unlimited length.

<?php
function rand_string($len, $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789')
{
	$string = '';
	for ($i = 0; $i < $len; $i++)
	{
		$pos = rand(0, strlen($chars)-1);
		$string .= $chars{$pos};
	}
	return $string;
}
?>