Load a CSV file and transform to an array. Simple helper for quick and dirty scripting.

fetch-csv-file.php

<?
/**
 * Given a path to a valid CSV file, returns an array containing the data
 * (an array of arrays, with outer arrays representing the rows and inner
 * arrays representing the columns).
 *
 * @param string $path_to_csv
 *
 * @return array
 */
function read_csv( string $path_to_csv ): array {
	$data = [];

	if ( ! file_exists( $path_to_csv ) ) {
		return [];
	}

	if ( ! $file_handle = fopen( $path_to_csv, 'r' ) ) {
		return [];
	}

	while ( ! feof( $file_handle ) ) {
		$data[] = fgetcsv( $file_handle, 32768 );
	}

	fclose( $file_handle );
	return $data;
}