HI. Im new to database. I didnt know how to use bridge table. In my bridge table i have SubjectID and studentID, PK from student table and subject table. In my subject table have SubjectID, SubjectName and SubjectLecturer while in my student table have studentID,,studentName,IC,studentFac,studentPhone, studentEmail,pswd,studentAddress. I didnt know where is the wrong part because when i click my form which is enroll button, this enroll page blank Can someone check my coding ? Help ?
<!DOCTYPE HTML> <html> <head> <?php error_reporting(0); session_start(); if (!isset($_SESSION['studentID'])) { $_SESSION['studentID'] = $_POST['studentID']; $_SESSION['pswd'] = $_POST['pswd']; } include("connect.php"); $sql = "SELECT * FROM student WHERE studentID='".$_SESSION['studentID']."' AND pswd='".$_SESSION['pswd']."'"; $result = mysql_query($sql); $row = mysql_num_rows($result); if ($row == 0) { echo "Login fail Try again <a href='http://bytes.com/'>here</a>"; ?> <meta http-equiv="refresh" content="0;userlogin.php" /> <?php } else { $row = mysql_fetch_assoc($result); } ?> <meta charset="UTF-8"> <title>E-Education portal</title> <link href="http://bytes.com/style.css" rel="stylesheet" type="text/css"> </head> <body> <div id="header"></ div> <?php if(isset($_POST["submit"])) { session_start(); include("connect.php"); $SubjectID = $_POST['SubjectID']; $SubjectName = $_POST['SubjectName']; $SubjectLecturer = $_POST['SubjectLecturer']; $Subject= "SELECT SubjectID FROM Subject WHERE SubjectID='$SubjectID'"; $queryssubject=mysql_query($subject) or die(mysql_error); $record=mysql_num_rows($querysubject); if($record==1) { header ('Location: studentSubject.php'); } else if($record<1) { if(substr($subjectID)) { $insertIntoSubject= "INSERT INTO Subject ('SubjectID', 'SubjectName', 'SubjectLecturer') VALUES ('$SubjectID','$SubjectName','$SubjectLecturer')"; $result1=mysql_query($insertIntoSubject) or die(mysql_error()); $insertIntobridge="INSERT INTO `bridge`(`SubjectID`, `studentID`) VALUES ('$SubjectID', '$studentID')"; $result2=mysql_query($insertIntobridge)or die(mysql_error()); $insertIntostudent="INSERT INTO student (`studentID`, `studentName`, `IC`, `studentFac`, `studentPhone`, `studentEmail`, `pswd`, `studentAddress') VALUES ('$studentID', '$studentName', '$IC', '$studentFac', '$studentPhone', '$studentEmail', 'abc123', '$studentAddress')"; $result3=mysql_query($insertIntostudent)or die(mysql_error()); if ($result1 && $result2 && $result3) { header ('Location: studentSubject.php'); } } else echo 'insert error'; } else { echo "<script type='text/javascript'> alert('Data Updated!') location.href='homestudent.php' </script>"; } mysql_close($conn); } ?>
