How can PHP be used to display the most recent entry at the beginning of a list instead of at the end, and what considerations should be made to prevent duplicate entries in the list?

To display the most recent entry at the beginning of a list in PHP, you can use the array_reverse() function to reverse the order of the entries retrieved from a database or any other data source. To prevent duplicate entries in the list, you can use the array_unique() function to remove any duplicate values before displaying the list.

// Retrieve entries from database
$entries = array("Entry 1", "Entry 2", "Entry 3", "Entry 2", "Entry 4");

// Remove duplicate entries
$unique_entries = array_unique($entries);

// Reverse the order of entries
$reversed_entries = array_reverse($unique_entries);

// Display the list
foreach ($reversed_entries as $entry) {
    echo $entry . "<br>";
}