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Querying a MySQL Table with Multiple URL Parameters

Posted on 2008-10-20
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Last Modified: 2013-12-13
Hello, I'm sure there is a simple solution to this, but I've been tearing my hair out for the last couple of hours, I have a form that generates a URL with multiple variables:

hostingsearch.php?Type=0&PriceGBP=10&StorageGB=10&DataTransferGB=10&submit=search

I cant for the life of me get the variables included into a MySQL query.

The parameters in the URL are exactly the same as the Fields in my Table that I am querying.

I want to retrieve and display information below a certain price, above a certain storage and above a certain bandwidth.

I've been playing with the query for hours and it's a bit of a mess - I'll post it below.

N.B. The urls work for individual queries created in DW, but not when I combine them.

Many thanks in advance for your help.

Betch
mysql_select_db($database_webhosting, $webhosting);
$query_hostingsearch = ("SELECT `Host`, Package, Rating, Storage, `Data Transfer`, `Included Domains`, Setup, Price 
FROM UKshared WHERE Type = %s", GetSQLValueString($colname_Type, "double")  AND PriceGBP <= %s", GetSQLValueString($colname_PriceGBP, "double")  AND StorageGB >= %s", GetSQLValueString($colname_StorageGB, "double")  AND DataTransferGB >= %s", GetSQLValueString($colname_DataTransferGB, "double") ORDER BY PriceGBP ASC ");
$query_limit_hostingsearch = sprintf("%s LIMIT %d, %d", $query_hostingsearch, $startRow_hostingsearch, $maxRows_hostingsearch);
$hostingsearch = mysql_query($query_limit_hostingsearch, $webhosting) or die(mysql_error());
$row_hostingsearch = mysql_fetch_assoc($hostingsearch);

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Question by:betch
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8 Comments
 
LVL 82

Expert Comment

by:hielo
ID: 22761869
try:

<?php
mysql_select_db($database_webhosting, $webhosting);
$query_limit_hostingsearch = sprintf("SELECT `Host`, `Package`, `Rating`, `Storage`, `Data Transfer`, `Included Domains`, `Setup`, `Price` FROM `UKshared` WHERE `Type` = %s  AND `PriceGBP` <= %s  AND `StorageGB` >= %s  AND `DataTransferGB` >= %s ORDER BY PriceGBP ASC  LIMIT %d, %d", 
					GetSQLValueString($colname_Type, "double"),
					GetSQLValueString($colname_PriceGBP, "double"), 
					GetSQLValueString($colname_StorageGB, "double"), 
					GetSQLValueString($colname_DataTransferGB, "double"), 
					$startRow_hostingsearch, 
					$maxRows_hostingsearch
					);
$hostingsearch = mysql_query($query_limit_hostingsearch, $webhosting) or die(mysql_error());
$row_hostingsearch = mysql_fetch_assoc($hostingsearch);
?>

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Author Comment

by:betch
ID: 22762256
Thanks hielo, I seem to be getting somewhere now however it returns 'query was empty'.

I'll post all of hosting search below.
<?php require_once('Connections/webhosting.php'); ?>
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "") 
{
  $theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
 
  $theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue);
 
  switch ($theType) {
    case "text":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;    
    case "long":
    case "int":
      $theValue = ($theValue != "") ? intval($theValue) : "NULL";
      break;
    case "double":
      $theValue = ($theValue != "") ? "'" . doubleval($theValue) . "'" : "NULL";
      break;
    case "date":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;
    case "defined":
      $theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
      break;
  }
  return $theValue;
}
}
 
$maxRows_hostingsearch = 10;
$pageNum_hostingsearch = 0;
if (isset($_GET['pageNum_hostingsearch'])) {
  $pageNum_hostingsearch = $_GET['pageNum_hostingsearch'];
}
$startRow_hostingsearch = $pageNum_hostingsearch * $maxRows_hostingsearch;
 
mysql_select_db($database_webhosting, $webhosting);
$query_limit_hostingsearch = sprintf("SELECT `Host`, `Package`, `Rating`, `Storage`, `Data Transfer`, `Included Domains`, `Setup`, `Price` FROM `UKshared` WHERE `Type` = %s  AND `PriceGBP` <= %s  AND `StorageGB` >= %s  AND `DataTransferGB` >= %s ORDER BY PriceGBP ASC  LIMIT %d, %d", 
                                        GetSQLValueString($colname_Type, "double"),
                                        GetSQLValueString($colname_PriceGBP, "double"), 
                                        GetSQLValueString($colname_StorageGB, "double"), 
                                        GetSQLValueString($colname_DataTransferGB, "double"), 
                                        $startRow_hostingsearch, 
                                        $maxRows_hostingsearch
                                        );
$hostingsearch = mysql_query($query_hostingsearch, $webhosting) or die(mysql_error());
$row_hostingsearch = mysql_fetch_assoc($hostingsearch);
$totalRows_hostingsearch = mysql_num_rows($hostingsearch);
?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Untitled Document</title>
</head>
 
<body>
<table border="1">
  <tr>
    <td>Host</td>
    <td>Package</td>
    <td>Rating</td>
    <td>Storage</td>
    <td>Data Transfer</td>
    <td>Included Domains</td>
    <td>Setup</td>
    <td>Price</td>
  </tr>
  <?php do { ?>
    <tr>
      <td><?php echo $row_hostingsearch['Host']; ?></td>
      <td><?php echo $row_hostingsearch['Package']; ?></td>
      <td><?php echo $row_hostingsearch['Rating']; ?></td>
      <td><?php echo $row_hostingsearch['Storage']; ?></td>
      <td><?php echo $row_hostingsearch['Data Transfer']; ?></td>
      <td><?php echo $row_hostingsearch['Included Domains']; ?></td>
      <td><?php echo $row_hostingsearch['Setup']; ?></td>
      <td><?php echo $row_hostingsearch['Price']; ?></td>
    </tr>
    <?php } while ($row_hostingsearch = mysql_fetch_assoc($hostingsearch)); ?>
</table>
</body>
</html>
<?php
mysql_free_result($hostingsearch);
?>

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LVL 82

Expert Comment

by:hielo
ID: 22762686
it should be:
$hostingsearch = mysql_query($query_limit_hostingsearch, $webhosting) or die( mysql_error() );

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Author Comment

by:betch
ID: 22762894
1 step closer, thanks so much for your help - hostingsearch.php now dispays the table but it is unpopulated/empty.

Could the problem be in the MySQL table?

Just checked MySQL and Type is "int" and DataTransferGB is "int"  - Apart from that it looks fine?!!

I'll post the form..
</div>
        <div id="divSearchPlans">
          <form action="hostingsearch.php" method="get" enctype="multipart/form-data" target="_parent">
            <table border="0" cellpadding="3" cellspacing="1">
              <tr>
                <td width="115" align="left" valign="top" nowrap="nowrap">Hosting Type :</td>
                <td align="right" valign="top"><select name="Type">
                  <option value="0">Shared Hosting</option>
                  <option value="1">Virtual Private Server</option>
                  <option value="2">Dedicated Server</option>
                  <option value="3">Reseller Hosting</option>
                    </select></td>
              </tr>
              <tr>
                <td width="115" align="left" valign="top" nowrap="nowrap">Monthly Price :</td>
                <td align="right" valign="top"><select name="PriceGBP" id="PriceGBP">
                  <option value="0" selected="selected">No Price Limit</option>
                  <option value="5">£5 or less</option>
                  <option value="10">£10 or less</option>
                  <option value="25">£25 or less</option>
                  <option value="50">£50 or less</option>
                  <option value="100">£100 or less</option>
                  <option value="100">£150 or less</option>
                  <option value="200">£200 or less</option>
                  <option value="300">£300 or less</option>
                  </select></td>
              </tr>
              <tr>
                <td width="115" align="left" valign="top" nowrap="nowrap">Storage :</td>
                <td align="right" valign="top"><select name="StorageGB" id="StorageGB">
                  <option value="" selected="selected">- - -</option>
                  <option value="1">At Least 1GB</option>
                  <option value="10">At Least 10GB</option>
                  <option value="25">At Least 25GB</option>
                  <option value="50">At Least 50GB</option>
                  <option value="100">At Least 100GB</option>
                  <option value="1000">At Least 1000GB</option>
                  <option value="0">Unlimited</option>
                  </select></td>
              </tr>
              <tr>
                <td width="115" align="left" valign="top" nowrap="nowrap">Transfer :</td>
                <td align="right" valign="top"><select name="DataTransferGB" id="DataTransferGB">
                  <option value="" selected="selected">- - -</option>
                  <option value="10">At Least 10GB</option>
                  <option value="500">At Least 500Gb</option>
                  <option value="1000">At Least 1000Gb</option>
                  <option value="5000">At Least 5000GB</option>
                  <option value="10000">At Least 10000GB</option>
                  <option value="15000">At Least 15000GB</option>
                  <option value="-1">Unlimited</option>
                  </select></td>
              </tr>
              
              
              <tr>
                <td colspan="2" align="right" valign="top" nowrap="nowrap">
                <input name="submit" type="submit" id="submit" value="search" /></td>
              </tr>
            </table>
          </form>

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LVL 82

Expert Comment

by:hielo
ID: 22763128
On the four calls to:
GetSQLValueString(..., ...)

I don't see you defining the first variable anywhere for any of these calls. I see you have:
$maxRows_hostingsearch = 10;
$pageNum_hostingsearch = 0;
 
but I am NOT seeing:
$colname_Type=...;
$colname_PriceGBP=...;
$colname_StorageGB=...;
$colname_DataTransferGB=...;
 
(where ... is supposed to be some value) anywhere on top of the page. You need to provide values for those. Otherwise your query may be returning zero records.

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Author Comment

by:betch
ID: 22765536
Thanks, I've added the 4 variables but if I populate them with numbers, my query just returns results for those numbers.

I need to populate my query with the URL variables.

Thanks again Betch
$maxRows_hostingsearch = 10;
$pageNum_hostingsearch = 0;
$colname_Type= [Type];
$colname_PriceGBP= ['PriceGBP'];
$colname_StorageGB= ['StorageGB'];
$colname_DataTransferGB= ['DataTransfer'];
if (isset($_GET['pageNum_hostingsearch'])) {
  $pageNum_hostingsearch = $_GET['pageNum_hostingsearch'];
}
$startRow_hostingsearch = $pageNum_hostingsearch * $maxRows_hostingsearch;
 
mysql_select_db($database_webhosting, $webhosting);
$query_limit_hostingsearch = sprintf("SELECT `Host`, `Package`, `Rating`, `Storage`, `Data Transfer`, `Included Domains`, `Setup`, `Price` FROM `UKshared` WHERE `Type` = %s  AND `PriceGBP` <= %s  AND `StorageGB` >= %s  AND `DataTransferGB` >= %s ORDER BY PriceGBP ASC  LIMIT %d, %d", 
                                        GetSQLValueString($colname_Type, "int"),
                                        GetSQLValueString($colname_PriceGBP, "double"), 
                                        GetSQLValueString($colname_StorageGB, "double"), 
                                        GetSQLValueString($colname_DataTransferGB, "int"), 
                                        $startRow_hostingsearch, 
                                        $maxRows_hostingsearch
                                        );

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LVL 82

Accepted Solution

by:
hielo earned 1000 total points
ID: 22767097
Given this:
hostingsearch.php?Type=0&PriceGBP=10&StorageGB=10&DataTransferGB=10&submit=search

then you need to intialize your variables as follows:
$colname_Type=$_GET['Type'];
$colname_PriceGBP=$_GET['PriceBP'];
$colname_StorageGB=$_GET['StorageGB'];
$colname_DataTransferGB=$_GET['DataTransferGB'];
0
 

Author Closing Comment

by:betch
ID: 31507999
Thanks very much hielo, it works perfectly now!
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