phpGPX

Simple library written in PHP for reading and creating GPX files.

Library is currently marked as Release Candidate but is already used in production on several project without any problems. Documentation is available using GitHub pages generated by Jekyll.

Contribution and feedback is welcome! Please check the issues for TODO. I will be happy every feature or pull request.

Features

• Full support of official specification.
• Statistics calculation.
• Extensions.
• JSON & XML & PHP Array output.

Supported Extensions

• Garmin TrackPointExtension: http://www.garmin.com/xmlschemas/TrackPointExtension/v1

Stats calculation

• Distance (m)
• Average speed (m/s)
• Average pace (s/km)
• Min / max altitude (m)
• Start / end (DateTime object)
• Duration (seconds)

Examples

Open GPX file and load basic stats

<?php
use phpGPX\phpGPX;

$gpx = new phpGPX();
	
$file = $gpx->load('example.gpx');
	
foreach ($file->tracks as $track)
{
    // Statistics for whole track
    $track->stats->toArray();
    
    foreach ($track->segments as $segment)
    {
    	// Statistics for segment of track
    	$segment->stats->toArray();
    }
}

Writing to file

<?php
use phpGPX\phpGPX;

$gpx = new phpGPX();
	
$file = $gpx->load('example.gpx');

// XML
$file->save('output.gpx', phpGPX::XML_FORMAT);
	
//JSON
$file->save('output.json', phpGPX::JSON_FORMAT);

Creating file from scratch

<?php

use phpGPX\Models\GpxFile;
use phpGPX\Models\Link;
use phpGPX\Models\Metadata;
use phpGPX\Models\Point;
use phpGPX\Models\Segment;
use phpGPX\Models\Track;

require_once '/vendor/autoload.php';

$sample_data = [
	[
		'longitude' => 9.860624216140083,
		'latitude' => 54.9328621088893,
		'elevation' => 0,
		'time' => new \DateTime("+ 1 MINUTE")
	],
	[
		'latitude' => 54.83293237320851,
		'longitude' => 9.76092208681491,
		'elevation' => 10.0,
		'time' => new \DateTime("+ 2 MINUTE")
	],
	[
		'latitude' => 54.73327743521187,
		'longitude' => 9.66187816543752,
		'elevation' => 42.42,
		'time' => new \DateTime("+ 3 MINUTE")
	],
	[
		'latitude' => 54.63342326167919,
		'longitude' => 9.562439849679859,
		'elevation' => 12,
		'time' => new \DateTime("+ 4 MINUTE")
	]
];

// Creating sample link object for metadata
$link 							= new Link();
$link->href 					= "https://sibyx.github.io/phpgpx";
$link->text 					= 'phpGPX Docs';

// GpxFile contains data and handles serialization of objects
$gpx_file 						= new GpxFile();

// Creating sample Metadata object
$gpx_file->metadata 			= new Metadata();

// Time attribute is always \DateTime object!
$gpx_file->metadata->time 		= new \DateTime();

// Description of GPX file
$gpx_file->metadata->description = "My pretty awesome GPX file, created using phpGPX library!";

// Adding link created before to links array of metadata
// Metadata of GPX file can contain more than one link
$gpx_file->metadata->links[] 	= $link;

// Creating track
$track 							= new Track();

// Name of track
$track->name 					= sprintf("Some random points in logical order. Input array should be already ordered!");

// Type of data stored in track
$track->type 					= 'RUN';

// Source of GPS coordinates
$track->source 					= sprintf("MySpecificGarminDevice");

// Creating Track segment
$segment 						= new Segment();


foreach ($sample_data as $sample_point)
{
	// Creating trackpoint
	$point 						= new Point(Point::TRACKPOINT);
	$point->latitude 			= $sample_point['latitude'];
	$point->longitude 			= $sample_point['longitude'];
	$point->elevation 			= $sample_point['elevation'];
	$point->time 				= $sample_point['time'];

	$segment->points[] 			= $point;
}

// Add segment to segment array of track
$track->segments[] 				= $segment;

// Recalculate stats based on received data
$track->recalculateStats();

// Add track to file
$gpx_file->tracks[] 			= $track;

// GPX output
$gpx_file->save('CreatingFileFromScratchExample.gpx', \phpGPX\phpGPX::XML_FORMAT);

// Serialized data as JSON
$gpx_file->save('CreatingFileFromScratchExample.json', \phpGPX\phpGPX::JSON_FORMAT);

// Direct GPX output to browser

header("Content-Type: application/gpx+xml");
header("Content-Disposition: attachment; filename=CreatingFileFromScratchExample.gpx");

echo $gpx_file->toXML()->saveXML();
exit();

Currently supported output formats:

• XML
• JSON

Installation

You can easily install phpGPX library with composer. There is no stable release yet, so please use release candidates.

composer require sibyx/phpgpx:@RC

Contributors

• Jakub Dubec - Initial works, maintenance
• Lukasz Lewandowski
• Robert Blackwell

I wrote this library as part of my job in Backbone s.r.o..

License

This project is licensed under the terms of the MIT license.