How can PHP be used to categorize and sort linked files based on specific criteria?

To categorize and sort linked files based on specific criteria in PHP, you can use an associative array to store the files with their corresponding categories. Then, you can use array functions like array_filter() and usort() to filter and sort the files based on the criteria.

$files = [
    'file1.txt' => 'category1',
    'file2.txt' => 'category2',
    'file3.txt' => 'category1',
    'file4.txt' => 'category3'
];

// Filter files by category
$category = 'category1';
$filteredFiles = array_filter($files, function($value) use ($category) {
    return $value == $category;
});

// Sort files alphabetically
usort($filteredFiles, function($a, $b) {
    return strcmp($a, $b);
});

// Print sorted files
foreach ($filteredFiles as $file => $category) {
    echo $file . ' - ' . $category . "\n";
}