Group PHP ODBC results with common dataset? - php

Question

I'm using PHP to connect to and display data from an ODBC MS Access database. I'm able to display the necessary data with a select statement, but I'm failing to learn how to group this data based on another dataset.
Here is my code:
<?
$handle = odbc_connect("Potter","","");
$results = odbc_exec($handle, "SELECT DISTINCT prodModelNo, prodSubType, prodCAD FROM product WHERE prodType NOT LIKE 'Plus' AND prodType = 'Fire' AND prodCAD LIKE '%CAD Drawing%' GROUP BY prodSubType");
// Results List
odbc_fetch_row($results, 0);
while(odbc_fetch_row($results)){
$cadString1 = odbc_result($results, "prodCAD");
$cadString2 = str_replace('<img src=images/i_drawing.gif> <a href=fire/', '', $cadString1);
$cadURL = str_replace(' target=_blank>CAD Drawing (zip format)</a>', '', $cadString2);
echo "<div id='file'><div id='filelink'><ul><li><a href='$cadURL'><img src='../images/download.png'/> Download</a> (zip format)</li></ul></div>";
echo odbc_result($results, "prodModelNo");
echo "<div class='clear'></div></div>";
}
?>
This outputs a list of accurate data. What I'd like to do is group results that share a common category and have that category name displayed between each group. The column for category names in the database is called prodSubType.
How would I get this to display properly?

Answer 1

Instead of GROUP BY prodSubType use ORDER BY prodSubType - so you can grab all items.
Then, in your code, have a BEFORE and AFTER variable to output the header differences (I'm not good at explaining this). See example (untested):
<?php
$handle = odbc_connect("Potter","","");
$results = odbc_exec($handle, "SELECT DISTINCT prodModelNo, prodSubType, prodCAD FROM product WHERE prodType NOT LIKE 'Plus' AND prodType = 'Fire' AND prodCAD LIKE '%CAD Drawing%' ORDER BY prodSubType ASC");
// Results List
odbc_fetch_row($results, 0);
$oldHeader = "";
while(odbc_fetch_row($results)){
$header = odbc_result($results, "prodSubType");
if($header != $oldHeader) {
$oldHeader = $header;
echo "<h1>$header</h1>";
}
$cadString1 = odbc_result($results, "prodCAD");
$cadString2 = str_replace('<img src=images/i_drawing.gif> <a href=fire/', '', $cadString1);
$cadURL = str_replace(' target=_blank>CAD Drawing (zip format)</a>', '', $cadString2);
echo "<div id='file'><div id='filelink'><ul><li><a href='$cadURL'><img src='../images/download.png'/> Download</a> (zip format)</li></ul></div>";
echo odbc_result($results, "prodModelNo");
echo "<div class='clear'></div></div>";
}
?>