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We've successfully moved our media catalog into a database. All the pages are now working as they did before. However, we have a couple places where our queries are not as efficient as they could be. We have a number of functions that are taking the full catalog array before using PHP to narrow down the items to a smaller list.
functions.php
function random_catalog_array() {
include("connection.php");
try {
$results = $db->query(
"SELECT media_id, title, category,img
FROM Media
ORDER BY RANDOM()
LIMIT 4"
);
} catch (Exception $e) {
echo "Unable to retrieved results";
exit;
}
$catalog = $results->fetchAll();
return $catalog;
}
function get_item_html($item) {
$output = "<li><a href='details.php?id="
. $item["media_id"] . "'><img src='"
. $item["img"] . "' alt='"
. $item["title"] . "' />"
. "<p>View Details</p>"
. "</a></li>";
return $output;
}
index.php
$random = random_catalog_array();
foreach ($random as $item) {
echo get_item_html($item);
}
RANDOM Functions in Popular Databases
SQLite | RANDOM() |
---|---|
MySQL | RAND() |
PostgreSQL | RANDOM() |
SQL Server | RAND() |
Oracle | DBMS_RANDOM.RANDOM |
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