T_logical_AND

I get this error for the following code, yet I have not used any AND in the code.
HAve checked the curlies and parentheses for matching, and searched for answers to similar problems without success.
Any help would be appreciated. Thanks in anticipation.

  // add a pass/fail  and number of wrong answers to the student answer submission record

  echo "....adding PASS or FAIL to your submission record<br>";

                 if ($wrong_answers !=0) {     // if one or more wrong answers

                    $pf = "f" ;                // set variable to f for fail

        $add_pass_fail = " UPDATE studentanswers SET passfail = '$pf', num_wrong = $wrong_answers WHERE  id = '$last_id'  ";
// do query and error routine                

 mysql_query($add_pass_fail, $conn) or die(mysql_error("Cant add PASS/FAIL status to student submission"));  

   }

PHP:

I have found the error...it was with parentheses about 300 lines past where php interpreter said it was!!!
Thanks

 

in which line exactly the error occured? that code seems having no problem.

 

Change this

 $add_pass_fail = " UPDATE studentanswers SET passfail = '$pf', num_wrong = $wrong_answers WHERE  id = '$last_id'  ";

PHP:

To this

 $add_pass_fail = " UPDATE studentanswers SET passfail = '$pf', num_wrong = '$wrong_answers' WHERE  id = '$last_id'  ";

PHP:

 

yeah... good point, assumed if $wrong_answers isn't numeric type var...

 

I have found the error...it was with parentheses about 300 lines past where php interpreter said it was!!!
Thanks