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mysql -> mysqli  utility function conversion to work with mysqli

Posted on 2014-11-11
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Last Modified: 2015-02-14
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
0
Comment
Question by:willsherwood
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4 Comments
 
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Accepted Solution

by:
Dave Baldwin earned 500 total points
ID: 40436577
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
0
 

Author Comment

by:willsherwood
ID: 40437444
your comment helped lead to a stupid typo,  sorry for the trouble, and thanks for the info!
0
 

Author Closing Comment

by:willsherwood
ID: 40610372
thanks for your help!  (as always, you're a GREAT resource!)
0
 
LVL 83

Expert Comment

by:Dave Baldwin
ID: 40610386
You're welcome, glad to help.
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