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Using an array to sort records off a database
Using MySQL Databases in PHP Pages example from a Well House Consultants training course
More on Using MySQL Databases in PHP Pages [link]

If you're searching for a page where you can try this code, select here

Source code: sort_sql.php Module: H113
<html>
<head>
<title>PHP - reporting database records unsorted and sorted</title>
</head>
<body>
<h2>PHP demonstration - sorting outside the database</h2>
The first report that this application outputs is a seriese of records
returned by an SQL query.  In the second report, instead of outputting the
records they are saved into an associative array which is then sorted, and
the records are output in sorted order.   They key to the associative array
is the value on which the items are going to be sorted - and we have added
an extra (incrementing) value onto the end of that key to ensure that it's
unique.  If we didn't do that, and if we had two houses at the same price,
we would loose one from our sorted report.
<?php
mysql_connect
("localhost","username","[password]");
mysql_select_db("wellho");

/* Reading from a database table and displaying records in
the order that they are returned */

print ("<h1>Here are some properties for sale</h1>");
$rs mysql_query("select locate,asking,brief from sales");
while (
$row mysql_fetch_assoc($rs)) {
        print (
"$row[locate] - $row[asking] - $row[brief]<br>");
        }

/* Reading from a database table and displaying records in a
different order */

print ("<h1>Here they are in price order</h1>");
$holder = array();
$rs mysql_query("select locate,asking,brief from sales");
$count 0;
while (
$row mysql_fetch_assoc($rs)) {
        
$count++;
        
$sortvalue $row[asking].".".$count;
        
$holder[$sortvalue] = "$row[locate] - $row[asking] - $row[brief]<br>";
        }
krsort($holder);
foreach (
array_keys($holder) as $keyval) {
        print (
$holder[$keyval]);
        }
?><br>
A couple of words of caution here: (a) You would be best advised to have
the MySQL do the sorting if you can - more efficient and (b) For a clean
application, I would much rather you had all the PHP at the top of the file,
stored the output into string variables, and output them within a template -
this is very much a sorting demo, and not meant to show best overall practise!
</body>
</html>

Learn about this subject
This module and example are covered on the following public courses:
 * Learning to program in PHP
 * PHP Programming
 * MySQL
 * PHP Programming
 * Learning to program in PHP
Also available on on site courses for larger groups

Books covering this topic
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Other Examples
This example comes from our "Using MySQL Databases in PHP Pages" training module. You'll find a description of the topic and some other closely related examples on the "Using MySQL Databases in PHP Pages" module index page.

Full description of the source code
You can learn more about this example on the training courses listed on this page, on which you'll be given a full set of training notes.

Many other training modules are available for download (for limited use) from our download centre under an Open Training Notes License.

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