php - trying to count entries in a database -


i'm trying count entries in database based on 2 basic criteria. returning blank result, though there results found. have idea doing wrong here? have tried many different ways , return no result. (if enter query directly in phpmyadmin returns result.)

$sql = "select count(*) total_count orderoption3detail orderdate='$orderdate' , studentid='$studentid'";  $numericalresult = mysql_query($sql, $con); $row = mysql_fetch_object($numericalresult); $totalorders1 =  $row->total_count; echo "my orders:" . $totalorders1;

as others stated, make sure sanitize variables before go query.

$sql = "select * orderoption3detail orderdate = '" . $orderdate . "' , studentid = '" . $studentid . "'";  $sql_request_data = mysql_query($sql) or die(mysql_error()); $sql_request_data_count = mysql_num_rows($sql_request_data);  echo "number of rows found: " . $sql_request_data_count;

that's need.


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