Function to Generate a PHP Random String of Numbers and Letters

Here’s a quick snippet of code that allows you to quickly generate a random string of letters and/or numbers based on the variables you feed into the function.

<?php
//Generate Random String
function generateCode($numchars=5,$digits=1,$letters=1)
{
$dig = "012345678923456789";
$abc = "ABCDEFGHJKLMNOPQRSTUVWXYZ";

if($letters == 1)
{
$str .= $abc;
}

if($digits == 1)
{
$str .= $dig;
}

for($i=0; $i < $numchars; $i++)
{
$randomized .= $str{rand() % strlen($str)};
}

return $randomized;
}
$code = generateCode('5','0','1');
echo $code;
?>

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Posted on January 8, 2010 in PHP Tutorials and has been tagged as php.

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