PHP: parse a CSV formatted file (comma-delimited)

parse-csv.php

<?php
/**
 * This file is use to parse a CSV formatted file (comma-delimited).
 */

// File should be first and only argument.
if ( empty( $argv[1] ) ) {
	die( 'Please supply at least one filename.' );
}

parse_csv_file( $argv[1] );

function parse_csv_file( $file ) {
	$results = array();

	$f = fopen( $file, "r" );

	while ( $line = fgets( $f ) ) {
		$fields = explode( ',', rtrim( $line ) );
	}

	// Simple print array
	echo "<pre>";
	print_r( $fields );
	echo "</pre><br>";

	fclose( $f );
}