Question

New to PDO … i am trying to get sum but getting error here is my code

function test_score_month($student_id){
    global $host, $dbname, $user, $pass;

    $DBH = new PDO("mysql:host=$host;dbname=$dbname", $user, $pass);
    $STH = $DBH->query("SELECT SUM(score), SUM(score_from) FROM school_test_report
    WHERE 
     school_test_report.test_date >= last_march() and school_test_report.test_date <= march()" );
    $STH->setFetchMode(PDO::FETCH_BOTH);
    return $STH;
}

out put is

$student_id = test_score_month($name);
echo $student_id['SUM(score)'];

but getting error

Call to a member function setFetchMode() on a non-object in

i have tryed

$STH->setFetchMode(PDO::FETCH_ASSOC);

but still same error

Answer 1

You have syntax error in your query:

WHERE 
    and

also are you sure that you have march() and last_march() functions in your DB ?

[+] Always check for errors after querying database:

if($STH){
 // do your stuff
}else{
 die($DBH->errorInfo()); // see the error
}

See http://www.php.net/manual/en/pdo.errorinfo.php