Member Avatar for ChrisJ

Can you please tell me what these lines of code do?

$sub_category = 0;
            if (!empty($_POST['sub_category_id'])) {
                $is_found = $db->where('type',PT_Secure($_POST['category_id']))->where('lang_key',PT_Secure($_POST['sub_category_id']))->getValue(T_LANGS,'COUNT(*)');
                if ($is_found > 0) {
                    $sub_category = PT_Secure($_POST['sub_category_id']);
                }
            }

I look forward to any assistance

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Dani AI

Generated

A short, practical summary for with a bit more context than gave: the code sets a safe fallback, checks whether a sub_category_id was posted, then queries the database to see if a matching record exists for the supplied category/subcategory pair. If the database returns a positive count the posted value is assigned (after passing it through PT_Secure). The important unknown is what PT_Secure actually does — inspect its definition in the project to know whether it trims, casts, escapes, or otherwise transforms the input before use.

A few concrete checks and hardening steps:

  • Confirm empty() semantics for your input (see PHP docs) and ensure the POST key is present exactly as named.
  • Verify the DB table and columns referenced by the where calls exist and that the DB library’s getValue(..., 'COUNT(*)') returns an integer as expected.
  • Decide whether sub_category should be an integer ID or a string key. Validate accordingly (numeric checks or whitelist of allowed keys) rather than relying solely on the DB count.
  • Review PT_Secure source to ensure it prevents SQL injection/XSS; prefer explicit validation and casting on critical values.

Performance and maintenance notes: use an index on the filtered columns for fast existence checks, log failed validations so bad input can be traced, and if you need more than an existence test, fetch the actual row instead of only counting.

empty() PHP manual getValue() (MysqliDb)

Member Avatar for Dani 
// Set the value of the $sub_category variable to zero.
$sub_category = 0;

// Check if the sub_category_id field, passed in via an HTTP post request, is empty, and if it's not (e.g. it contains data that is not 0 or FALSE) then execute what's inside this IF block
if (!empty($_POST['sub_category_id'])) {

    // Perform a database query based on some PHP ORM library you're using, and store the results in the
    // $is_found variable; I have absolutely no clue what PT_Secure does, and you are not including it here ...
    // that being said, I do see a COUNT(*) at the end and COUNT(*) on its own returns the number of rows
    // returned by a query ... I just have no idea what PT_Secure is and if it changes the data at all
    $is_found = $db->where('type',PT_Secure($_POST['category_id']))->where('lang_key',PT_Secure($_POST['sub_category_id']))->getValue(T_LANGS,'COUNT(*)');

    // If the $is_found variable is greater than zero then execute what's in this IF block
    if ($is_found > 0) {

        // Set the $sub_category variable to <something> but again, I have no idea what PT_Secure() does
        $sub_category = PT_Secure($_POST['sub_category_id']);
    }
}
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