code-boxx/0-PHP-GPS-TRACK.MD

## 0-PHP-GPS-TRACK.MD

      
    Raw
  

              0-PHP-GPS-TRACK.MD
            
          
    PHP MYSQL GPS TRACKING SYSTEM

https://code-boxx.com/gps-tracking-system-php-javascript/
NOTES


Create a database and import 1-database.sql.
Change the database settings in 2-lib-track.php to your own.
Access 4a-track.html for the client/rider tracking page, and 4b-admin.html for the demo admin page.
Take extra note that GPS geolocation requires https:// to work properly. http://localhost is an exception for testing.

LICENSE

Copyright by Code Boxx
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

  
## 1-database.sql
CREATE TABLE `gps_track` (
  `rider_id` bigint(20) NOT NULL,
  `track_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `track_lng` decimal(11,7) NOT NULL,
  `track_lat` decimal(11,7) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

ALTER TABLE `gps_track`
  ADD PRIMARY KEY (`rider_id`),
  ADD KEY `track_time` (`track_time`);

## 2-lib-track.php
<?php
class Track {
  // (A) CONSTRUCTOR - CONNECT TO DATABASE
  public $pdo = null;
  public $stmt = null;
  public $error = "";
  function __construct () {
    $this->pdo = new PDO(
      "mysql:host=".DB_HOST.";dbname=".DB_NAME.";charset=".DB_CHARSET,
      DB_USER, DB_PASSWORD, [
      PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
      PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC
    ]);
  }

  // (B) DESTRUCTOR - CLOSE CONNECTION
  function __destruct () {
    if ($this->stmt !== null) { $this->stmt = null; }
    if ($this->pdo !== null) { $this->pdo = null; }
  }

  // (C) HELPER FUNCTION - EXECUTE SQL QUERY
  function query ($sql, $data=null) : void {
    $this->stmt = $this->pdo->prepare($sql);
    $this->stmt->execute($data);
  }

  // (D) UPDATE RIDER COORDINATES
  function update ($id, $lng, $lat) {
    $this->query(
      "REPLACE INTO `gps_track` (`rider_id`, `track_time`, `track_lng`, `track_lat`) VALUES (?,?,?,?)",
      [$id, date("Y-m-d H:i:s"), $lng, $lat]
    );
    return true;
  }

  // (E) GET RIDER(S) COORDINATES
  function get ($id=null) {
    $this->query(
      "SELECT * FROM `gps_track`" . ($id==null ? "" : " WHERE `rider_id`=?"),
      $id==null ? null : [$id]
    );
    return $this->stmt->fetchAll();
  }
}

// (F) DATABASE SETTINGS - CHANGE THESE TO YOUR OWN!
define("DB_HOST", "localhost");
define("DB_NAME", "test");
define("DB_CHARSET", "utf8mb4");
define("DB_USER", "root");
define("DB_PASSWORD", "");

// (G) START!
$_TRACK = new Track();

## 3-ajax-track.php
<?php
if (isset($_POST["req"])) {
  require "2-lib-track.php";
  switch ($_POST["req"]) {
    // (A) UPDATE RIDER LOCATION
    case "update":
      echo $_TRACK->update($_POST["id"], $_POST["lng"], $_POST["lat"])
        ? "OK" : $_TRACK->error ;
      break;

    // (B) GET RIDER(S) LAST KNOWN LOCATION
    case "get":
      echo json_encode($_TRACK->get(isset($_POST["id"]) ? $_POST["id"] : null));
      break;
  }
}

## 4a-track.html
<!DOCTYPE html>
<html>
  <head>
    <title>Geolocation Tracking Demo</title>
    <meta charset="utf-8">
    <link rel="stylesheet" href="X-demo.css">
    <script src="4a-track.js"></script>
  </head>
  <body>
    <div class="row">
      <div class="title">Updated</div>
      <div class="data" id="date"></div>
    </div>
    <div class="row">
      <div class="title">Latitude, Longitude</div>
      <div class="data">
        <span id="lat"></span>, <span id="lng"></span>
      </div>
    </div>
  </body>
</html>

## 4a-track.js
var track = {
  // (A) INIT
  rider : 999,   // rider id - fixed to 999 for demo
  delay : 10000, // delay between gps update (ms)
  timer : null,  // interval timer
  hDate : null,  // html date
  hLat : null,   // html latitude
  hLng : null,   // html longitude
  init : () => {
    // (A1) GET HTML
    track.hDate = document.getElementById("date");
    track.hLat = document.getElementById("lat");
    track.hLng = document.getElementById("lng");

    // (A2) START TRACKING
    track.update();
    track.timer = setInterval(track.update, track.delay);
  },

  // (B) SEND CURRENT LOCATION TO SERVER
  update : () => navigator.geolocation.getCurrentPosition(
    pos => {
      // (B1) LOCATION DATA
      var data = new FormData();
      data.append("req", "update");
      data.append("id", track.rider);
      data.append("lat", pos.coords.latitude);
      data.append("lng", pos.coords.longitude);

      // (B2) AJAX SEND TO SERVER
      fetch("3-ajax-track.php", { method:"POST", body:data })
      .then(res => res.text())
      .then(txt => { if (txt=="OK") {
        let now = new Date();
        track.hDate.innerHTML = now.toString();
        track.hLat.innerHTML = pos.coords.latitude;
        track.hLng.innerHTML = pos.coords.longitude;
      } else { track.error(txt); }})
      .catch(err => track.error(err));
    },
    err => track.error(err)
  ),

  // (C) HELPER - ERROR HANDLER
  error : err => {
    console.error(err);
    alert("An error has occured, open the developer's console.");
    clearInterval(track.timer);
  }
};
window.onload = track.init;

## 4b-admin.html
<!DOCTYPE html>
<html>
  <head>
    <title>GPS Tracking Demo</title>
    <meta charset="utf-8">
    <link rel="stylesheet" href="X-demo.css">
    <script src="4b-admin.js"></script>
  </head>
  <body>
    <div id="wrapper"></div>
  </body>
</html>

## 4b-admin.js
var track = {
  // (A) INIT
  delay : 10000,  // delay between location refresh
  timer : null,   // interval timer
  hWrap : null,   // html <div> wrapper
  init : () => {
    track.hWrap = document.getElementById("wrapper");
    track.show();
    track.timer = setInterval(track.show, track.delay);
  },

  // (B) GET DATA FROM SERVER AND UPDATE MAP
  show : () => {
    // (B1) DATA
    var data = new FormData();
    data.append("req", "get");

    // (B2) AJAX FETCH
    fetch("3-ajax-track.php", { method:"POST", body:data })
    .then(res => res.json())
    .then(data => { for (let r of data) {
      let row = document.createElement("div");
      row.className = "row";
      row.innerHTML =
        `<div class="title">[${r.track_time}] Rider ${r.rider_id}</div>
         <div class="data">${r.track_lat}, ${r.track_lng}</div>`;
      track.hWrap.appendChild(row);
    }})
    .catch(err => track.error(err));
  },

  // (C) HELPER - ERROR HANDLER
  error : err => {
    console.error(err);
    alert("An error has occured, open the developer's console.");
    clearInterval(track.timer);
  }
};
window.onload = track.init;

## X-demo.css
* {
  font-family: Arial, Helvetica, sans-serif;
  box-sizing: border-box;
}
body { background: #f2f2f2; }
.row {
  margin-bottom: 10px;
  padding: 10px;
  border: 1px solid #e1e1e1;
  background: #fff;
}
.title {
  text-transform: uppercase;
  font-size: 1.2em;
  margin-bottom: 5px;
}
.data {
  color: #ff2d2d;
  font-size: 0.9em;
}
	CREATE TABLE `gps_track` (
	`rider_id` bigint(20) NOT NULL,
	`track_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
	`track_lng` decimal(11,7) NOT NULL,
	`track_lat` decimal(11,7) NOT NULL
	) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

	ALTER TABLE `gps_track`
	ADD PRIMARY KEY (`rider_id`),
	ADD KEY `track_time` (`track_time`);
	<?php
	class Track {
	// (A) CONSTRUCTOR - CONNECT TO DATABASE
	public $pdo = null;
	public $stmt = null;
	public $error = "";
	function __construct () {
	$this->pdo = new PDO(
	"mysql:host=".DB_HOST.";dbname=".DB_NAME.";charset=".DB_CHARSET,
	DB_USER, DB_PASSWORD, [
	PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
	PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC
	]);
	}

	// (B) DESTRUCTOR - CLOSE CONNECTION
	function __destruct () {
	if ($this->stmt !== null) { $this->stmt = null; }
	if ($this->pdo !== null) { $this->pdo = null; }
	}

	// (C) HELPER FUNCTION - EXECUTE SQL QUERY
	function query ($sql, $data=null) : void {
	$this->stmt = $this->pdo->prepare($sql);
	$this->stmt->execute($data);
	}

	// (D) UPDATE RIDER COORDINATES
	function update ($id, $lng, $lat) {
	$this->query(
	"REPLACE INTO `gps_track` (`rider_id`, `track_time`, `track_lng`, `track_lat`) VALUES (?,?,?,?)",
	[$id, date("Y-m-d H:i:s"), $lng, $lat]
	);
	return true;
	}

	// (E) GET RIDER(S) COORDINATES
	function get ($id=null) {
	$this->query(
	"SELECT * FROM `gps_track`" . ($id==null ? "" : " WHERE `rider_id`=?"),
	$id==null ? null : [$id]
	);
	return $this->stmt->fetchAll();
	}
	}

	// (F) DATABASE SETTINGS - CHANGE THESE TO YOUR OWN!
	define("DB_HOST", "localhost");
	define("DB_NAME", "test");
	define("DB_CHARSET", "utf8mb4");
	define("DB_USER", "root");
	define("DB_PASSWORD", "");

	// (G) START!
	$_TRACK = new Track();
	<?php
	if (isset($_POST["req"])) {
	require "2-lib-track.php";
	switch ($_POST["req"]) {
	// (A) UPDATE RIDER LOCATION
	case "update":
	echo $_TRACK->update($_POST["id"], $_POST["lng"], $_POST["lat"])
	? "OK" : $_TRACK->error ;
	break;

	// (B) GET RIDER(S) LAST KNOWN LOCATION
	case "get":
	echo json_encode($_TRACK->get(isset($_POST["id"]) ? $_POST["id"] : null));
	break;
	}
	}
	<!DOCTYPE html>
	<html>
	<head>
	<title>Geolocation Tracking Demo</title>
	<meta charset="utf-8">
	<link rel="stylesheet" href="X-demo.css">
	<script src="4a-track.js"></script>
	</head>
	<body>
	<div class="row">
	<div class="title">Updated</div>
	<div class="data" id="date"></div>
	</div>
	<div class="row">
	<div class="title">Latitude, Longitude</div>
	<div class="data">
	<span id="lat"></span>, <span id="lng"></span>
	</div>
	</div>
	</body>
	</html>
	var track = {
	// (A) INIT
	rider : 999, // rider id - fixed to 999 for demo
	delay : 10000, // delay between gps update (ms)
	timer : null, // interval timer
	hDate : null, // html date
	hLat : null, // html latitude
	hLng : null, // html longitude
	init : () => {
	// (A1) GET HTML
	track.hDate = document.getElementById("date");
	track.hLat = document.getElementById("lat");
	track.hLng = document.getElementById("lng");

	// (A2) START TRACKING
	track.update();
	track.timer = setInterval(track.update, track.delay);
	},

	// (B) SEND CURRENT LOCATION TO SERVER
	update : () => navigator.geolocation.getCurrentPosition(
	pos => {
	// (B1) LOCATION DATA
	var data = new FormData();
	data.append("req", "update");
	data.append("id", track.rider);
	data.append("lat", pos.coords.latitude);
	data.append("lng", pos.coords.longitude);

	// (B2) AJAX SEND TO SERVER
	fetch("3-ajax-track.php", { method:"POST", body:data })
	.then(res => res.text())
	.then(txt => { if (txt=="OK") {
	let now = new Date();
	track.hDate.innerHTML = now.toString();
	track.hLat.innerHTML = pos.coords.latitude;
	track.hLng.innerHTML = pos.coords.longitude;
	} else { track.error(txt); }})
	.catch(err => track.error(err));
	},
	err => track.error(err)
	),

	// (C) HELPER - ERROR HANDLER
	error : err => {
	console.error(err);
	alert("An error has occured, open the developer's console.");
	clearInterval(track.timer);
	}
	};
	window.onload = track.init;
	var track = {
	// (A) INIT
	delay : 10000, // delay between location refresh
	timer : null, // interval timer
	hWrap : null, // html <div> wrapper
	init : () => {
	track.hWrap = document.getElementById("wrapper");
	track.show();
	track.timer = setInterval(track.show, track.delay);
	},

	// (B) GET DATA FROM SERVER AND UPDATE MAP
	show : () => {
	// (B1) DATA
	var data = new FormData();
	data.append("req", "get");

	// (B2) AJAX FETCH
	fetch("3-ajax-track.php", { method:"POST", body:data })
	.then(res => res.json())
	.then(data => { for (let r of data) {
	let row = document.createElement("div");
	row.className = "row";
	row.innerHTML =
	`<div class="title">[${r.track_time}] Rider ${r.rider_id}</div>
	<div class="data">${r.track_lat}, ${r.track_lng}</div>`;
	track.hWrap.appendChild(row);
	}})
	.catch(err => track.error(err));
	},

	// (C) HELPER - ERROR HANDLER
	error : err => {
	console.error(err);
	alert("An error has occured, open the developer's console.");
	clearInterval(track.timer);
	}
	};
	window.onload = track.init;
	* {
	font-family: Arial, Helvetica, sans-serif;
	box-sizing: border-box;
	}
	body { background: #f2f2f2; }
	.row {
	margin-bottom: 10px;
	padding: 10px;
	border: 1px solid #e1e1e1;
	background: #fff;
	}
	.title {
	text-transform: uppercase;
	font-size: 1.2em;
	margin-bottom: 5px;
	}
	.data {
	color: #ff2d2d;
	font-size: 0.9em;
	}