/**
* Validate password according to HKVCA production rules
* Rules:
* - Minimum 8 characters
* - Maximum 128 characters
* - Must contain at least one letter and one number
* - Special characters allowed
*/
function validate_password(string $password): array
{
$errors = [];
if (strlen($password) < 8) {
$errors[] = "Password must be at least 8 characters long and must be composed of letters and numbers";
}
if (strlen($password) > 128) {
$errors[] = "Password cannot be longer than 128 characters.";
}
if (!preg_match('/[A-Za-z]/', $password)) {
$errors[] = "Password must contain at least one letter.";
}
if (!preg_match('/[0-9]/', $password)) {
$errors[] = "Password must contain at least one number.";
}
return $errors; // empty array = valid
}
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