What is the purpose of sorting a CSV file in PHP and what are the benefits?

Sorting a CSV file in PHP allows you to organize the data within the file in a specific order based on one or more columns. This can make it easier to analyze the data, find specific information, or present the data in a more meaningful way. The benefits of sorting a CSV file include improved data organization, easier data manipulation, and better data visualization.

// Read the CSV file into an array
$csvData = array_map('str_getcsv', file('data.csv'));

// Sort the array based on the values in the second column (index 1)
usort($csvData, function($a, $b) {
    return $a[1] <=> $b[1];
});

// Write the sorted data back to the CSV file
$fp = fopen('sorted_data.csv', 'w');
foreach ($csvData as $fields) {
    fputcsv($fp, $fields);
}
fclose($fp);