Made some strutural changes.

includes/class.utils.php

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+<?php
+if (!class_exists('UTILS')) {
+    class UTILS
+    {
+        function timeAgo($dateTime, $sendUnis = true)
+        {
+            if ($dateTime == "")
+                return "";
+
+            $dateTime = time() - strtotime($dateTime);
+
+            $tokens = array(
+                31536000 => array(_YEAR, _YEARS),
+                2592000 => array(_MONTH, _MONTHS),
+                604800 => array(_WEEK, _WEEKS),
+                86400 => array(_DAY, _DAYS),
+                3600 => array(_HOUR, _HOURS),
+                60 => array(_MINUTE, _MINUTES),
+                1 => array(_SECOND, _SECONDS)
+            );
+
+            foreach ($tokens as $unit => $text) {
+                if ($dateTime < $unit) continue;
+                $numberOfUnits = floor($dateTime / $unit);
+                return $numberOfUnits . "" . ($sendUnis ? (($numberOfUnits > 1) ? " " . $text[1] : " " . $text[0]) : "") . "";
+            }
+        }
+
+        function convertUnit($meterPerSec,$unit='kilometer_per_hour',$label=false){
+            $units=array(
+                "kilometer_per_hour"=>"0.2777778",
+                "mile_per_hour"=>"0.44704"
+            );
+            $unitsLabels=array(
+                "kilometer_per_hour"=>"km/h",
+                "mile_per_hour"=>" mi/h"
+            );
+            if($label){
+                return number_format(($meterPerSec*$units[$unit]),0,",","")." ".$unitsLabels[$unit];
+            }else{
+                return number_format(($meterPerSec*$units[$unit]),0,",","");
+            }
+
+        }
+
+        function generateRandomPoint($centre, $radius="") {
+            $radius_earth = 5; //miles
+
+            //Pick random distance within $distance;
+            $distance = lcg_value()*$radius;
+
+            //Convert degrees to radians.
+            $centre_rads = array_map( 'deg2rad', $centre );
+
+            //First suppose our point is the north pole.
+            //Find a random point $distance miles away
+            $lat_rads = (pi()/2) -  $distance/$radius_earth;
+            $lng_rads = lcg_value()*2*pi();
+
+
+            //($lat_rads,$lng_rads) is a point on the circle which is
+            //$distance miles from the north pole. Convert to Cartesian
+            $x1 = cos( $lat_rads ) * sin( $lng_rads );
+            $y1 = cos( $lat_rads ) * cos( $lng_rads );
+            $z1 = sin( $lat_rads );
+
+
+            //Rotate that sphere so that the north pole is now at $centre.
+
+            //Rotate in x axis by $rot = (pi()/2) - $centre_rads[0];
+            $rot = (pi()/2) - $centre_rads[0];
+            $x2 = $x1;
+            $y2 = $y1 * cos( $rot ) + $z1 * sin( $rot );
+            $z2 = -$y1 * sin( $rot ) + $z1 * cos( $rot );
+
+            //Rotate in z axis by $rot = $centre_rads[1]
+            $rot = $centre_rads[1];
+            $x3 = $x2 * cos( $rot ) + $y2 * sin( $rot );
+            $y3 = -$x2 * sin( $rot ) + $y2 * cos( $rot );
+            $z3 = $z2;
+
+
+            //Finally convert this point to polar co-ords
+            $lng_rads = atan2( $x3, $y3 );
+            $lat_rads = asin( $z3 );
+
+            return array_map( 'rad2deg', array( $lat_rads, $lng_rads ) );
+        }
+
+    }
+}

includes/settings.php

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+<?php
+    date_default_timezone_set('Europe/Lisbon');
+    putenv("TZ=Europe/Lisbon");
+
+    include_once(__DIR__."/class.utils.php");
+    $ClassUtils = new UTILS();
+
+    //Getting the Language from the browser
+    $lang = substr($_SERVER['HTTP_ACCEPT_LANGUAGE'], 0, 2);
+    $acceptLang = ['pt', 'en'];
+    $lang = in_array($lang, $acceptLang) ? $lang : 'en';
+    require_once(__DIR__ . "/../languages/" . $lang . ".php");
+
+    // This key must be entered in OsmAnd's tracking URL as &key=
+    $secretKey = '';
+    // This key must be entered in OsmAnd's tracking URL as &realgpskey=
+    $secretRealGPSKey="";
+
+	// API key from MapQuest. Get one from developer.mapquest.com
+	$apikey = '';
+
+	//Where the Tracker is
+	$trackerURL="";
+
+    // Used to round the lat/lon values so you aren't sharing your *exact* location
+    $accuracy = 2; // in number of decimal positions
+
+	// Random name for the file to avoid being downloaded ( Change this value )
+    $fileName="";
+    // Where to store your last location
+    $filePath = __DIR__ . "/../" .$fileName;
+
+    //Default Unit for speed
+    $unitForSpeed="kilometer_per_hour";
+    //$unitForSpeed="mile_per_hour";
+
+    //Time in seconds when the page gets updates automatically. Zero means no refresh
+    $refreshTime=60;
+
+	// Used in page title
+    $yourName = 'Jonh Doe';
+	// Used in page title
+    $pageTitle = $yourName;
+
+	// Zoom on the map
+	// 8 gives a high overview; 12 gives a more zoomed-in map. Lower or higher values also possible.
+    $zoom = "15";
+
+    $height = "600";
+    $width = "900";

index.php

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+<?php
+    require_once __DIR__."/includes/settings.php";
+
+	if ($secretKey=='') {
+		die(_WARNING_NEED_TO_CHANGE_SECRET_KEY);
+	}
+	if ($apikey == '') {
+		die(_WARNING_NEED_TO_GET_APIKEY);
+	}
+
+	if(file_exists($filePath)){
+        $loc_string = file_get_contents($filePath);
+        $info = unserialize($loc_string);
+        $timeAgo=$ClassUtils->timeAgo(date("Y-m-d H:i:s",substr($info['timestamp'],0,-3)));
+        $altitude=number_format($info['altitude'],0,",","")." m";
+        $speedLabel=$ClassUtils->convertUnit($info['speed'],$unitForSpeed,true);
+        $speed=$ClassUtils->convertUnit($info['speed'],$unitForSpeed);
+
+        if($_GET['realgps']==$secretRealGPSKey){
+            $lat = $info['reallat'];
+            $lon = $info['reallon'];
+        }else{
+            $lat = $info['fakelat'];
+            $lon = $info['fakelon'];
+        }
+
+        if($speed>0){
+            $statusIcon="marker-lg-417505-$speed";
+        }else{
+            $statusIcon="marker-lg-f2231f-$speed";
+        }
+        //$statusIcon=$trackerURL."icons/mia.png";
+
+        $staticUrl = 'https://www.mapquestapi.com/staticmap/v5/map?';
+        $staticUrl = $staticUrl."size=$width,$height&type=map&imagetype=jpeg&key=$apikey";
+        $staticUrl = $staticUrl . "&locations=$lat,$lon|".$statusIcon."&size=@2x|&zoom=$zoom&center=$lat,$lon";
+        $mapUrl = 'https://www.openstreetmap.org';
+        $mapUrl = $mapUrl . "?mlat=$lat&mlon=$lon";
+    }else{
+	    die(_LOCATION_FILE_DOES_NOT_EXIST);
+    }
+
+    /* Note that you can embed an interactive map using:
+		$bbox = 0.01; // Zoom. 0.1 gives an overview, 0.01 is quite zoomed in, 0.001 is street-level.
+		$bboxleft = $lon - $bbox;
+		$bboxbottom = $lat - $bbox;
+		$bboxright = $lon + $bbox;
+		$bboxtop = $lat + $bbox;
+		$bb = urlencode($bboxleft . ',' . $bboxbottom . ',' . $bboxright . ',' . $bboxtop);
+		<iframe src="http://www.openstreetmap.org/export/embed.html?m&bbox=$bb&amp;layer=mapnik" width=800 height=600></iframe>
+		The issue is that you cannot place a marker (not that I have found).
+	*/
+    echo "<html>
+            <head>
+                <title>$pageTitle</title>
+                ".($refreshTime>0?"<meta http-equiv='refresh' content='$refreshTime'/>":"")."
+            </head>
+            <body>
+                <center>
+                    ".($timeAgo>0?"<h3>".$yourName." "._STATUS_AS_OF." ".$timeAgo."</h3>":"")."
+                    <h4><img src='icons/download-speed.png' width='24px'>
+                    ".($speed>0?"".$speedLabel."":""._IT_IS_STOPPED."")."
+                    <img src='icons/mountain.png' width='24px'> ".$altitude."</h4>
+                    <p><a href='".$mapUrl."'><img src='".$staticUrl."'></a></p>
+                    <p>"._CLICK_TO_SEE_INTERACTIVE_MAP."</p>
+                    <small>"._PAGE_GENERATED_AT." ".date("H:i")."</small>
+                </center>
+            </body>
+         </html>";
+
+

languages/en.php

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+<?php
+
+DEFINE ("_STATUS_AS_OF", "status as of");
+DEFINE ("_MINUTES_AGO", "minutes ago");
+DEFINE ("_SPEED", "Speed");
+DEFINE ("_IT_IS_STOPPED", "Taking a break.");
+DEFINE ("_TIMEZONE", "Timezone");
+DEFINE ("_PAGE_GENERATED_AT", "Page generated at");
+DEFINE ("_CLICK_TO_SEE_INTERACTIVE_MAP", "Click for an interactive map");
+DEFINE ("_WARNING_INVALID_SECRET_KEY", "The used key is invalid");
+DEFINE ("_WARNING_NEED_TO_GET_APIKEY", "You must create and API key at <a href='https://developer.mapquest.com/'>https://developer.mapquest.com/</a>");
+
+DEFINE ("_WARNING_NEED_TO_CHANGE_SECRET_KEY", "This application is not functional yet. See the README how to set it up (hint: edit settings.php).");
+DEFINE ("_LOCATION_FILE_DOES_NOT_EXIST", "The localtion file needed to run this application is not yet available, please return later.");
+
+DEFINE ("_YEAR", "year");
+DEFINE ("_YEARS", "years");
+DEFINE ("_MONTH", "month");
+DEFINE ("_MONTHS", "months");
+DEFINE ("_WEEK", "week");
+DEFINE ("_WEEKS", "weeks");
+DEFINE ("_DAY", "day");
+DEFINE ("_DAYS", "days");
+DEFINE ("_HOUR", "hour");
+DEFINE ("_HOURS", "hours");
+DEFINE ("_MINUTE", "minute");
+DEFINE ("_MINUTES", "minutes");
+DEFINE ("_SECOND", "second");
+DEFINE ("_SECONDS", "seconds");
+
+

languages/pt.php

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+<?php
+
+DEFINE ("_STATUS_AS_OF", " esteve aqui à");
+DEFINE ("_MINUTES_AGO", "minutos atrás");
+DEFINE ("_SPEED", "Velocidade");
+DEFINE ("_IT_IS_STOPPED", "A Descansar!!");
+DEFINE ("_TIMEZONE", "Fuso Horário");
+DEFINE ("_PAGE_GENERATED_AT", "Página gerada às");
+
+DEFINE ("_CLICK_TO_SEE_INTERACTIVE_MAP", "Clicar para ver mapa interativo");
+DEFINE ("_WARNING_INVALID_SECRET_KEY", "A chave utilizade é inválida");
+DEFINE ("_WARNING_NEED_TO_GET_APIKEY", "É necessário criar uma chave de API em <a href='https://developer.mapquest.com/'>https://developer.mapquest.com/</a>");
+DEFINE ("_WARNING_NEED_TO_CHANGE_SECRET_KEY", "Este aplicativo ainda não está funcional. Veja o README como configurá-lo (dica: edite o settings.php e altere a chave secreta).");
+DEFINE ("_LOCATION_FILE_DOES_NOT_EXIST", "O arquivo de localização necessário para executar este aplicativo ainda não está disponível, por favor volte mais tarde.");
+
+DEFINE ("_YEAR", "ano");
+DEFINE ("_YEARS", "anos");
+DEFINE ("_MONTH", "mês");
+DEFINE ("_MONTHS", "meses");
+DEFINE ("_WEEK", "semana");
+DEFINE ("_WEEKS", "semanas");
+DEFINE ("_DAY", "dia");
+DEFINE ("_DAYS", "dias");
+DEFINE ("_HOUR", "hora");
+DEFINE ("_HOURS", "horas");
+DEFINE ("_MINUTE", "minuto");
+DEFINE ("_MINUTES", "minutos");
+DEFINE ("_SECOND", "segundo");
+DEFINE ("_SECONDS", "segundos");

tests/generatePoint.php

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+<?php
+    require_once __DIR__."/../includes/settings.php";
+
+    //Generate GPS point
+    $point = array(
+       'x' => random_int(-90, 90 - 1) + (random_int(0, PHP_INT_MAX - 1) / PHP_INT_MAX ),
+       'y' => random_int(-180, 180 - 1) + (random_int(0, PHP_INT_MAX - 1) / PHP_INT_MAX )
+    );
+
+    $min=1;
+    $max=300;
+    $hdop=($min+lcg_value()*(abs($max-$min)));
+    $altitude=($min+lcg_value()*(abs($max-$min)));
+    $speed=($min+lcg_value()*(abs($max-$min)));
+    $timestamp=time();
+
+    $info['lat'] = round($point['x'], $accuracy);
+    $info['lon'] = round($point['y'], $accuracy);
+    $info['timestamp'] = intval($timestamp)."000";
+    $info['hdop'] = floatval($hdop);
+    $info['altitude'] = floatval($altitude);
+    $info['speed'] = floatval($speed);
+    $url=$trackerURL."/tracker.php?lat=".$info['lat']."&lon=".$info['lon']."&timestamp=".$info['timestamp']."&hdop=".$info['hdop']."&altitude=".$info['altitude']."&speed=".$info['speed']."&key=".$secretKey;
+    echo "<a href='$url' target='_blank'>$url</a>";
+    $fh = fopen($filePath, 'w');
+    fwrite($fh, serialize($info));
+    fclose($fh);