php and mysql to xml - php

Question

i have 2 tables, first one which stores restaurant info and second stores dishes served in each. They are linked using res_id.
1) info_main [id, res_id, res_name,res_pc]
2) dishes [id,dishName,price,res_id(Foreign key)]
My SQL query is
$query = "SELECT * FROM info_main LEFT JOIN dishes ON info_main.res_id = dishes.res_id";
I am inserting the results from the query into an xml file which works fine. Below is the code:
$query = "SELECT * FROM info_main LEFT JOIN dishes ON info_main.res_id = dishes.res_id";
$result = mysql_query($query);
if (!$result) {
die('Invalid query: ' . mysql_error());
}
header("Content-type: text/xml");
echo '<markers>';
// Iterate through the rows, printing XML nodes for each
while ($row = #mysql_fetch_assoc($result)){
// ADD TO XML DOCUMENT NODE
echo '<marker> ';
echo '<detail1>';
echo '<resdetails ';
echo 'name="' . parseToXML($row['res_name']) . '" ';
echo 'id="' . parseToXML($row['res_ID']) . '" ';
echo 'pc="' . parseToXML($row['res_pc'] ). '" ';
echo '/>';
echo '<dishdetails ';
echo 'name="' . parseToXML($row['dishName']) . '" ';
echo 'price="' . parseToXML($row['price']) . '" ';
echo '/>';
echo '</detail1>';
echo '</marker>';
}
This work fine however if a restaurant has 3 dishes in the database, then xml create 3 nodes: Something like this:
I want the xml structure like
<detail1>
<resdetails name="spoted dog" id="xyz" pc="xyz"/>
<dishdetails name="bean burger" price="1" />
<dishdetails name="cheese and tomato panini" price="3" />
<dishdetails name="veg salad" price="2" />
</details1>
I cant figure out a way how to achieve the above stated xml structure. Your help is greatly appreciated. Thanks

Answer 1

$query = "SELECT * FROM info_main LEFT JOIN dishes ON info_main.res_id = dishes.res_id";
$result = mysql_query($query);
if (!$result) {
die('Invalid query: ' . mysql_error());
}
header("Content-type: text/xml");
echo '<markers>';
// Iterate through the rows, printing XML nodes for each
$resname = "";
while ($row = #mysql_fetch_assoc($result)){
// ADD TO XML DOCUMENT NODE
if ($resname!=$row['res_name']) {
//restname isn't populated or doesn't match current so output new headers
echo '<marker> ';
echo '<detail1>';
echo '<resdetails ';
echo 'name="' . parseToXML($row['res_name']) . '" ';
echo 'id="' . parseToXML($row['res_ID']) . '" ';
echo 'pc="' . parseToXML($row['res_pc'] ). '" ';
echo '/>';
}
//this bit needs to always happen
echo '<dishdetails ';
echo 'name="' . parseToXML($row['dishName']) . '" ';
echo 'price="' . parseToXML($row['price']) . '" ';
echo '/>';
if ($resname!=$row['res_name']) {
//restname isn't populated or doesn't match current so output new headers
echo '</detail1>';
echo '</marker>';
}
$resname = $row['res_name']; //set resname to this res_name as this is our check to see if we've already put out required headers for this item that way every change it'll put this back in
}
Something like this (note may need some tidying up)

Answer 2

For that structure just do this:
echo '<marker> ';
echo '<detail1>';
while ($row = #mysql_fetch_assoc($result)){
echo '<dishdetails ';
echo 'name="' . parseToXML($row['dishName']) . '" ';
echo 'price="' . parseToXML($row['price']) . '" ';
echo '/>';
}
echo '</detail1>';
echo '</marker>';
All that is really different, is that I moved a portion of your code out of the while loop.

Answer 3

Atlast i got that working, i used two query's, one getting distinct restarant and other getting dishname. i used loop in the main loop. below is the code.
$query = "SELECT DISTINCT * FROM info_main";
$result = mysql_query($query);
if (!$result) {
die('Invalid query: ' . mysql_error());
}
header("Content-type: text/xml");
echo '<markers>';
// Iterate through the rows, printing XML nodes for each
while ($row = #mysql_fetch_assoc($result)){
$id=$row['res_id'];
// ADD TO XML DOCUMENT NODE
echo '<marker> ';
echo '<detail1>';
echo '<resdetails ';
echo 'name="' . parseToXML($row['res_name']) . '" ';
echo 'id="' . parseToXML($id) . '" ';
echo 'pc="' . parseToXML($row['res_pc'] ). '" ';
echo '/>';
$dishes = "SELECT * FROM dishes WHERE res_id = '" . $id . "'";
$dish = mysql_query($dishes);
while ($row2 = #mysql_fetch_assoc($dish)){
$id2 = $row2['res_id'];
echo '<dishdetails ';
echo 'name="' . parseToXML($row2['dishName']) . '" ';
echo 'price="' . parseToXML($row2['price']) . '" ';
echo '/>';
}
echo '</detail1>';
echo '</marker>';
}
echo '</markers>';