querying from a link

mcstec · June 17, 2006

I have created a Database driven CD Database, right now, I have adding cd to the db "name and title" after adding the cd you can now add the tracks, But after I add tracks... and click the link on the homepage it shows all tracks for all the cds...

My question is, How do I only see the tracks for the selected cd after the link is clicked?
Here is the code for the the link:
should be (cd_id and trigger and cd_title)
[code]
<a href='tracks.php?cd_id={$cd3['cd_id']}&tracks&cd_title={$cd3['cd_title']}'>Tracks</a>
[/code]

Here is the code for the tracks.php page:

[code]
<html>
<head>
<?php
include 'connect.php';
$cdl = @mysql_query("select * from cds where cd_id={$_GET['cd_id']}");
$cd2 = @mysql_num_rows($cdl);
$cd3 = @mysql_fetch_array($cdl);
?>
<title>Tracks for [<?php echo "{$cd3['cd_band']} - {$cd3['cd_title']}"; ?>]</title>
<link rel="stylesheet" href="style.css" type="text/css">
</head>

<body class="UsePageBg">
<a href="index.php">Home</a><br>
<?php
if (isset($tracks)):
?>

<table width="100%" border="1"  class="InternalHeader" >
  <tr>
    <td width="10%" align="center">CD Band</td>
    <td width="10%" align="center">CD Title </td>

  </tr>
</table>
<?php

// get cds
include 'connect.php';
$cdl = @mysql_query("select * from cds where cd_id={$_GET['cd_id']}");
$cd2 = @mysql_num_rows($cdl);
$cd3 = @mysql_fetch_array($cdl);

//get tracks
$cd4 = @mysql_query("select * from tracks where cd_id={$_GET['cd_id']}&cd_title={$_GET['cd_title']}");
$cd5 = @mysql_num_rows($cd4);
$cd6 = @mysql_fetch_array($cd4);
?>
<table width="100%" border="1" cellspacing="0" cellpadding="0" class="NormalTableTwo">
  <tr>
    <td width="10%" align="center"><?php echo "{$cd3['cd_band']}"; ?></td>
    <td width="10%" align="center"><?php echo "{$cd3['cd_title']}"; ?></td>
  </tr>

</table>
<p>
<a href="tracks.php?cd_id=<?php echo "{$cd3['cd_id']}"; ?>&addtracks&<?php echo "{$cd3['cd_title']}"; ?>">Add Tracks</a><br>
<table width="100%" border="1" class="InternalHeader">
  <tr>
    <td width="10%" align="center">CD Track No.</td>
    <td width="100%" align="center">CD Track Title </td>

  </tr>
</table>
<?php
include 'connect.php';
mysql_connect("$server", "$username", "$password") or die (mysql_error());
$result = mysql_db_query($db, "SELECT * FROM tracks order by cd_trackid") or die (mysql_error());

if (mysql_num_rows($result)) {
?>
<table width="100%" border="1" cellspacing="0" cellpadding="0" class="NormalTableTwo">
<?php
while ($qry = mysql_fetch_array($result)) {
echo "
  <tr>
    <td width='10%' align='center'>{$qry['cd_trackno']}</td>
    <td width='100%' align='center'>{$qry['cd_tracktitle']}</td>

  </tr>";
  }
  }
  ?>
</table>

<?php echo "{$cd3['cd_title']}"; ?>
</body>
</html>
<?php

  endif;
  ?>
<?php
if (isset($addtracks)):
include("connect.php");

//$cd_id = $_GET["cd_id"];
    //$r = @mysql_query("select * from tracks where cd_id='$cd_id'") or die(mysql_error());
    //$a = @mysql_fetch_array($r);

$cd_title = $_GET["cd_title"];
    $t = @mysql_query("select * from cds where cd_title='$cd_title'") or die(mysql_error());
    $i = @mysql_fetch_array($t);
?>
<title>Add Tracks for [<?php echo "{$cd3['cd_band']} - {$cd3['cd_title']}"; ?>]</title>
<p>
<form action="<? echo $_SERVER['PHP_SELF']; ?>" method="post">
<input name="cd_id" type="text" value="<?php echo $_GET['cd_id']; ?>" readonly="true">
<input name="cd_title" type="hidden" value="<?php echo "{$cd3['cd_title']}"; ?>" readonly="true">

<table width="100%" border="1" class="InternalHeader">
  <tr>
    <td width="10%" align="center">CD Track No. </td>
    <td width="100%" align="center">CD Track Title </td>
  </tr>
</table>
<table width="100%" border="0" class="NormalTableTwo">
  <tr>
    <td width="10%" align="center"><input name="cd_trackno" type="text" size="5"></td>
    <td width="100%" align="center"><input name="cd_tracktitle" type="text" size="100"></td>
  </tr>

</table>

Adding tracks for <?php echo "{$cd3['cd_band']}"; ?> - <?php echo "{$cd3['cd_title']}"; ?>
<br>
<input name="save" type="submit" value="Save Tracks">
</form>
</p>
<?php
  else:
        // Connect to the database server
    include("connect.php");
        $cd_id = $_POST['cd_id'];
        $cd_title = $_POST['cd_title'];
    $cd_trackno = $_POST['cd_trackno'];
    $cd_tracktitle = $_POST['cd_tracktitle'];
     // If CD has been submitted,
    // add it to the database.
    if ($save == "Save Tracks") {

      $sql = "INSERT INTO $table1 SET
                cd_id='$cd_id',
              cd_title='$cd_title',
              cd_trackno='$cd_trackno',
              cd_tracktitle='$cd_tracktitle'";

      if (@mysql_query($sql)) {
        echo("<P>CD Track(s) (<b>$cd_trackno - $cd_tracktitle</b>) saved.</P><a href=tracks.php?cd_id=$cd_id&tracks&cd_title=$cd_title>DONE</a> | <a href=tracks.php?cd_id=$cd_id&addtracks>Add another Track</a>");
      } else {
        echo("<P>Error saving Track <b>$cd_trackno - $cd_tracktitle</b>:<br> "
.
             mysql_error() . "</P>");
      }
    }

endif;

?>
[/code]

Any help would be greatly appriciated.

joquius · June 17, 2006

why so many {} you don't need them. They're only for $var{$string}

<a href='tracks.php?cd_id={$cd3['cd_id']}&tracks&cd_title={$cd3['cd_title']}'>Tracks</a>

Is this in html or in an echo?
if it's in html

?><a href="tracks.php?cd_id=<?=$cd3['cd_id']?>&tracks&cd_title=<?=$cd3['cd_title']?>">Tracks</a><?

In any case this line:

$cdl = @mysql_query("select * from cds where cd_id={$_GET['cd_id']}");

will not work if $_GET['cd_id'] is not set so you should have an if() statement around it to provent issues

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