mysql -> mysqli utility function conversion to work with mysqli

below is a handy function i inherited that (in the old mysql) allowed a single rowXcolumn (scalar) value to be returned
by using a one-line function call (instead of $results =  and then  $row['fieldname'] =  the value you want)

with mysqli it is returning the error shown at the bottom.

any help with what was not updated properly for mysqli conventions?
thanks!


ex usage:  
      $NumLineItems = db_sql("SELECT COUNT(*) FROM tblSales_order_details WHERE so_header_key = 30 ");
        echo $NumLineItems;

definition
function db_sfq ($query)
{
      $result = db_sql($query);   // this function works fine
      if ($result)
        {
            $row      = mysqli_fetch_array($result);
            return $row[0]; // only one field scalar was requested
      }
}// end db_SingleFieldQuery

error
Catchable fatal error: Object of class mysqli_result could not be converted to string
willsherwoodAsked:
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Dave BaldwinFixer of ProblemsCommented:
That error message often indicates an error in the previous statement.  If everything is ok, your code should work.  Look at Example #2 on this page: http://php.net/manual/en/mysqli-result.fetch-array.php
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willsherwoodAuthor Commented:
your comment helped lead to a stupid typo,  sorry for the trouble, and thanks for the info!
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willsherwoodAuthor Commented:
thanks for your help!  (as always, you're a GREAT resource!)
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Dave BaldwinFixer of ProblemsCommented:
You're welcome, glad to help.
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