Question

Hello I’m checking duplicated data from tables. I have a problem that from where data selected. My code is:

$sub_cat = array(); 
$select = array("core_network","daisy_chain", "rf_bts", "rf_power", "rf_transmission");
$d='0';
for ($i=0;$i<=4;$i++){
    $SQL = "SELECT sub_cat FROM (".$select[$i].") WHERE location=('".$id."')";
    $result = mysql_query($SQL);

    $cs=$d;

    if ($result) {
        while ($db_field = mysql_fetch_array($result)) {
            if(!in_array($db_field['sub_cat'],$sub_cat)) {
                $sub_cat[]= $db_field['sub_cat'];
                $cs++;
                $d=$cs;
                $d--;
            }
        }
    } 

I need to know that sub_cat selected from which $select[i]. How to find it?

Answer 1

To get the values, do this:

$sub_cat = array(); 
$select = array("core_network","daisy_chain", "rf_bts", "rf_power", "rf_transmission");
$d='0';
for ($i=0;$i<=4;$i++){
    $SQL = "SELECT sub_cat FROM (" . $select[$i] . ") WHERE location=('".$id."')";
    $result = mysql_query($SQL); // deprecated - use PDO

    $cs = $d;

    if ($result) {
        while ($db_field = mysql_fetch_array($result)) {
            if(!in_array($db_field['sub_cat'], $sub_cat)) {
                $table = $select[$i];
                $sub_cat[$table][] = $db_field['sub_cat'];

                // I have no clue what's going on here in your example:
                $cs++;
                $d=$cs;
                $d--;
            }
        }
    } 
}

Then, to retrieve it:

foreach ($sub_cat as $table_name => $values) {
    foreach ($values as $row) {
        // output values here
    }
}