Question

This page generates the option pulled from database . another page brings here the year of joining of students via year_joining . rest of the mysql queries works absolutely fine ( tested )

<?php
include_once("../Include/connectdb.php");

if($_GET['year_join'])
{
$id=$_GET['year_join'];

$result1 = mysql_query("select distinct sub_id from subject_profile where   batch='$id'        

")or die(mysql_error());

  while($subid = mysql_fetch_assoc($result1)){

 $result2 = mysql_query("SELECT name FROM  `subjects` WHERE  `sub_id` LIKE    

'$subid[sub_id]'");

    $subject=mysql_fetch_assoc($result2);

    if($subject[name]!=""){
  //print "<OPTION value=".$tmp.'">'.$tmp.'</OPTION>';
  //print "<OPTION value='$tmp'>'$tmp'</OPTION>";
  echo "<option value=".$subject['name'] . '">' . $subject['name'] . '</option>';
  //echo '<option value="'.$id.'">'.$data.'</option>';
 //}
 }
}
}
?>

FYI :

//print "<OPTION value=".$tmp.'">'.$tmp.'</OPTION>';
//print "<OPTION value='$tmp'>'$tmp'</OPTION>";
echo "<option value=".$subject['name'] . '">' . $subject['name'] . '</option>';
//echo '<option value="'.$id.'">'.$data.'</option>';

none of these are working … 🙁

with simple echo $tmp it works
but when ever i put as

echo "<option value=";

the result is blank page …

and when i am echo – ing just the variable its works perfectly fine

echo $tmp;

gives the list of all the subjects ..

Answer 1

For the problem regarding “not displaying output”, I believe you have missed a <select> tag enclosing the <option> tags.

As a side note, in the query, change it like this:

"SELECT name FROM  `subjects` WHERE  `sub_id` LIKE '{$subid[sub_id]}'"

or,

"SELECT name FROM  `subjects` WHERE  `sub_id` LIKE '" . $subid[sub_id] . "'"

Still it is not safe. You should escape the values and better use a prepared statement using mysqli or PDO