I have been assigned a task to create a search engine and a layout with a group of people, and am working with another to create the search engine itself, as a school project. We are using a database with multiple tables and plenty of content to work with.
To the issue, the two of us are are using the $_SESSION variable (from here on out just called session) to save the post data from a html form. Basically, the first search will bring up a table of contents, with one of the columns possessing anchor tags to go on further into the table (essentially first recieving a list of blueprints and the hyperlink leading to a table containing all the needed parts for it, or something similar.)
The issue in this case, if you click one of these links the new table shows just fine. But if you make a new search with the engine and recieve a different iteration of the first table, the top tag will lead to the same table of parts as before, despite going from a new table.
Code:
search.php
<?php
include("error_logger.php");
session_cache_limiter('private_no_expire');
function select_loop($select)
{
$connect = mysql_connect("mysql.itn.liu.se", "lego") or die("connection failed!". mysql_error);
mysql_select_db("lego");
if($select == 1)
{
$contents = mysql_query("SELECT DISTINCT itemtypes.Itemtypename FROM itemtypes JOIN inventory
ON inventory.ItemtypeID = itemtypes.ItemtypeID WHERE inventory.ItemtypeID = itemtypes.ItemtypeID
ORDER BY itemtypes.Itemtypename ASC");
}
else if($select == 2)
{
$contents = mysql_query("SELECT DISTINCT categories.CategoryName FROM categories JOIN sets ON
sets.CatID = categories.CatID WHERE sets.CatID = categories.CatID
ORDER BY categories.Categoryname ASC");
}
else if($select == 3)
{
$contents = mysql_query("SELECT DISTINCT colors.Colorname FROM colors JOIN inventory ON
inventory.ColorID = colors.ColorID WHERE inventory.ColorID = colors.ColorID
ORDER BY colors.Colorname ASC");
}
else if($select == 4)
{
$contents = mysql_query("SELECT DISTINCT sets.Year FROM sets JOIN inventory ON
sets.SetID = inventory.SetID WHERE sets.SetID = inventory.SetID
ORDER BY Year DESC");
}
while($rowname = mysql_fetch_row($contents))
{
echo "<option value=\"$rowname[0]\">$rowname[0]</option>";
}
mysql_close($connect);
}
function sql_out($post) {
$selectarr = array("selector1" => "", "selector2" => "", "selector3" => "", "selector4" => "");
$wherearr = array("selector1" => "", "selector2" => "", "selector3" => "", "selector4" => "");
if($post['setnr'] != "")
{
$post['setnr'] .= "-";
}
if($post['selector1'] != "")
{
$selectarr['selector1'] = "itemtypes." . $post['selector1'] . ", ";
$wherearr['selector1'] = "itemtypes.Itemtypename = '" . $post['selector1'] . "' AND ";
}
if($post['selector2'] != "")
{
$selectarr['selector2'] = "categories." . $post['selector2'] . ", ";
$wherearr['selector2'] = "categories.Categoryname = '" . $post['selector2'] . "' AND ";
}
if($post['selector3'] != "")
{
$selectarr['selector3'] = "colors." . $post['selector3'] . ", ";
$wherearr['selector3'] = "colors.Colorname = '" . $post['selector3'] . "' AND ";
}
if($post['selector4'] != "")
{
$selectarr['selector4'] = "sets." . $post['selector4'];
$wherearr['selector4'] = "sets.Year = '" . $post['selector4'] . "' AND ";
}
$connect = mysql_connect("mysql.itn.liu.se","lego");
mysql_select_db("lego");
$contents = mysql_query("SELECT DISTINCT sets.SetID, sets.Setname,
categories.Categoryname, sets.Year
FROM sets JOIN categories ON sets.CatID = categories.CatID
JOIN inventory ON sets.SetID = inventory.SetID
JOIN colors ON inventory.ColorID = colors.ColorID
JOIN itemtypes ON inventory.ItemtypeID = itemtypes.ItemtypeID
WHERE ".$wherearr['selector1'].$wherearr['selector2'].
$wherearr['selector3'].$wherearr['selector4']."
sets.SetID LIKE '".$post['setnr']."%' AND sets.Setname LIKE '%".$post['name']."%'
ORDER BY ".$post['order']." ".$post['order2']);
write_table($connect, $contents, 0);
}
function write_table($con, $contents, $imgvar)
{
global $arrstorage;
$arrstorage = array();
$k = 0;
if(mysql_num_rows($contents) == 0)
{
print("Inga satser funna!");
}
else
{
print("<table border=1>
<tr>");
for($i=0; $i<mysql_num_fields($contents) + $imgvar; $i++)
{
if($i < mysql_num_fields($contents))
{
$fieldname = mysql_field_name($contents, $i);
if($fieldname != "ColorID")
{
print("<th>$fieldname</th>");
}
}
else
{
print("<th>Images</th>");
}
}
print "</tr>
";
while($row = mysql_fetch_row($contents))
{
print("<tr>");
$colid;
$itemid;
for($i=0; $i<mysql_num_fields($contents) + $imgvar; $i++)
{
if($i<mysql_num_fields($contents))
{
$fieldnamecheck = mysql_field_name($contents, $i);
if($fieldnamecheck == "ColorID")
{
$colid = $row[$i];
}
if($fieldnamecheck == "PartID")
{
$itemid = $row[$i];
}
if($fieldnamecheck == "Setname")
{
array_push($arrstorage, $row[$i]);
print("<td><a href=\"results.php?id=$k\">$row[$i]</a></td>");
$k++;
}
else if($fieldnamecheck != "ColorID")
{
print("<td>$row[$i]</td>");
}
}
else
{
print("<td><img src=\"http://webstaff.itn.liu.se/~stegu/img.bricklink.com/P/$colid/$itemid.gif\"
style=\"margin: auto; display: block; max-height: 500px; max-width: 500px;\"/>
<img src=\"http://webstaff.itn.liu.se/~stegu/img.bricklink.com/P/$colid/$itemid.jpg\"
style=\"margin: auto; display: block; max-height: 500px; max-width: 500px;\"/></td>");
}
}
print("</tr>
");
}
print("</table>
");
}
mysql_close($con);
}
function show_set_parts($session, $nr)
{
$connect = mysql_connect("mysql.itn.liu.se","lego");
mysql_select_db("lego");
var_dump($session['setname']['0'][$nr]);
if(!empty($session['post']['0']['selector3']))
{
$session['post']['0']['selector3'] = "AND colors.Colorname = '" . $session['post']['0']['selector3'] . "'";
}
$contents = mysql_query("SELECT DISTINCT parts.Partname, parts.PartID, inventory.Quantity,
colors.Colorname, colors.ColorID, itemtypes.Itemtypename
FROM inventory JOIN parts ON inventory.ItemID = parts.PartID
JOIN sets ON inventory.SetID = sets.SetID
JOIN colors ON inventory.ColorID = colors.ColorID
JOIN itemtypes ON inventory.ItemtypeID = itemtypes.ItemtypeID
WHERE sets.SetID = inventory.SetID
AND inventory.ItemID = parts.PartID
AND sets.Setname = '".$session['setname']['0'][$nr]."'
".$session['post']['0']['selector3']."");
unset($_SESSION);
session_destroy();
write_table($connect, $contents, 1);
}
results.php (shows tables)
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<?php
include("search.php");
session_start();
if($_POST)
{
$_SESSION['post'] = array();
array_push($_SESSION['post'], $_POST);
}
if($_POST)
{
sql_out($_POST);
}
else
{
show_set_parts($_SESSION, $_REQUEST['id']);
}
if($_POST)
{
$_SESSION['setname'] = array();
array_push($_SESSION['setname'], $arrstorage);
}
?>
</body>
</html>
legodemo.php
<html>
<head>
<?php include("search.php"); ?>
<meta charset="utf-8"/>
</head>
<body>
<form action="results.php" method="POST">
<p>Ange numret på en Lego-sats:</p>
<p>Set Name: <input type="text" name="name" /></p>
<p>Set ID: <input type="text" name="setnr" /></p>
<p>Item Type:
<select name="selector1" id="selector1">
<option value="">Select All</option>
<?php
select_loop(1);
?>
</select>
<br />
<br />
Item Category:
<select name="selector2" id="selector2">
<option value="">Select All</option>
<?php
select_loop(2);
?>
</select>
<br />
<br />
Item Color:
<select name="selector3" id="selector3">
<option value="">Select All</option>
<?php
select_loop(3);
?>
</select>
<br />
<br />
Item Release Year:
<select name="selector4" id="selector4">
<option value="">Select All</option>
<?php
select_loop(4);
?>
</select>
<br />
<br />
<p>Order by:
<br />
<input type="radio" value="sets.Setname" name="order" checked="checked"/>Setname
<br />
<input type="radio" value="sets.SetID" name="order"/>SetID
<br />
<input type="radio" value="colors.Colorname" name="order"/>Color
<br />
<input type="radio" value="categories.Categoryname" name="order"/>Category
<br />
<input type="radio" value="sets.Year" name="order"/>Year
</p>
<p>
<input type="radio" value="ASC" name="order2" checked="checked"/>Ascending
<br/>
<input type="radio" value="DESC" name="order2"/>Descending
</p>
<p><input type="submit" value="Send request" />
<input type="reset" value="Reset request" /></p>
</form>
</body>
</html>
As far as i can tell, the variable called "$session['setname']['0'][$nr]" in search.php is the major problem here, thats whats not updating properly. Hopefully someone here can help me find out what's wrong here, as all of you are probably way better at this than i am.
