To answer this question specifically, two problems:
$randstring
is not in scope when you echo it.Here's a code snippet with the corrections:
function generateRandomString($length = 10) {
$characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
$charactersLength = strlen($characters);
$randomString = '';
for ($i = 0; $i < $length; $i++) {
$randomString .= $characters[random_int(0, $charactersLength - 1)];
}
return $randomString;
}
Output the random string with the call below:
// Echo the random string.
echo generateRandomString();
// Optionally, you can give it a desired string length.
echo generateRandomString(64);
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