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Generate Random String

/ Published in: PHP

Generates a random string of variable length.

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function getUniqueCode($length = "")
{	
	$code = md5(uniqid(rand(), true));
	if ($length != "") return substr($code, 0, $length);
	else return $code;
}

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Posted By: KyleFarris on October 23, 2008

Very useful. Thanks.

Posted By: EliotRosewater on November 10, 2009

One problem with this function is that the length of the returned string cannot exceed 32 characters, as md5() returns a 32 character string. I have rectified this by making the function recursive, and I have tightened the syntax by using ternary operators:

function getUniqueCode($length = false)
{
    $code = md5(uniqid(rand(), true));

    $code = (strlen($code)

Posted By: EliotRosewater on November 10, 2009

Sorry, it didnt post above:

function getUniqueCode($length = false)
{
    $code = md5(uniqid(rand(), true));
    $code = (strlen($code)

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