Oscoomerce tep_create_random_value($length, 'digits'); function not working

Question

This function generate_cart_id() not working. Oscommerce after updating PHP version 5.6 to 7.2.

File: catalog/includes/classes/shopping_cart.php

function generate_cart_id($length = 5) {
  return tep_create_random_value($length, 'digits');
}

Answer 1

try this function, we use it for our oscoommerce templates on php 5.4 - 7.4:

function tep_create_random_value($length, $type='mixed') {
if (($type!='mixed') && ($type!='chars') && ($type!='digits'))
    return false;

$rand_value='';
while (strlen($rand_value) < $length) {
    if ($type=='digits') {
        $char=tep_rand(0, 9);
    }else {
        $char=chr(tep_rand(0, 255));
    }
    if ($type=='mixed') {
        if (preg_match('/^[a-z0-9]$/i', $char))
            $rand_value.=$char;
    }elseif ($type=='chars') {
        if (preg_match('/^[a-z]$/i', $char))
            $rand_value.=$char;
    }elseif ($type=='digits') {
        if (preg_match('/^[0-9]$/', $char))
            $rand_value.=$char;
    }
}

return $rand_value;

}