PHP command line script that consumes a CSV dump from the [Pedometer++ iOS app](http://pedometerplusplus.com/) and reports total and average number of steps over the date range contained in the file.

steps.php

#!/usr/bin/env php
<?php
/**
 * Consumes a CSV file as exported by the
 * [Pedometer++ iOS app](http://pedometerplusplus.com/) and reports your total
 * steps and average steps per day for the range of dates contained in the file.
 *
 * beporter@users.sourceforge.net
 * v1.0.0
 * 2017-05-10
 *
 * Usage:
 *    $ ./pedometer.php steps.csv
 *
 */

namespace beporter\Pedometer;

use \DateTime;
use \SplFileObject;

$csv = ($argv[1] ?? 'steps.csv');
$f = new SplFileObject($csv);
$f->setFlags(SplFileObject::READ_CSV);

$inputDateFormat = 'n/j/y|';
$outputDateFormat = 'Y-m-d';
$earliestDate = new DateTime();
$latestDate = new DateTime('1970-01-01 00:00:00');
$days = 0;
$total = 0;

foreach ($f as $row) {
	list($date, $steps, $floors, $ascended, $descended) = $row;
	$steps = intval($steps);
	$date = DateTime::createFromFormat($inputDateFormat, $date);

	if ($steps > 0) {
		$days++;
		$total += $steps;
		$earliestDate = ($date < $earliestDate ? $date : $earliestDate);
		$latestDate = ($date > $latestDate ? $date : $latestDate);
	}
}

$f = null;

printf(
	'       Date Range: %s to %s' . PHP_EOL,
	$earliestDate->format($outputDateFormat),
	$latestDate->format($outputDateFormat)
);
printf(
	'    Total >0 days: %12d' . PHP_EOL,
	$days
);
printf(
	'      Total steps: %12d' . PHP_EOL,
	$total
);
printf(
	'Avg steps per day: %14.1f' . PHP_EOL,
	($total / $days)
);