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data_access.php
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<?php
/*
*this file can access database for appropriate data
*/
class dbhelper{
private $mysqli;
private $servername = "localhost";
private $username = "root";
private $password = "";
public function __construct() {
$this->mysqli = new mysqli($this->servername,"root","","route");
}
function get_all_stopies(){
$query = "SELECT node1,node2 FROM route ORDER BY node1 ";
$result = $this->mysqli->query($query);
$xml = '<item>';
while($row = $result->fetch_assoc()){
$xml = $xml.'<route>';
foreach($row as $key=>$val){
$xml=$xml."<$key>$val</$key>";
}
$xml = $xml.'</route>';
}
$xml = $xml.'</item>';
$xml=simplexml_load_string($xml) or die("Error: Cannot create object");
return $xml;
}
function get_distinct_stopies(){
$query = "SELECT DISTINCT node1 FROM route ORDER BY node1";
$result = $this->mysqli->query($query);
$i=0;
while($row = $result->fetch_assoc()){
foreach($row as $key=>$val){
$node1[$i]=$val;
$flag[$val]=0;
$i++;
}
}
$query = "SELECT DISTINCT node2 FROM route ORDER BY node1 ";
$result = $this->mysqli->query($query);
while($row = $result->fetch_assoc()){
foreach($row as $key=>$val){
if(!isset($flag[$val])){
$node1[$i]=$val;
$flag[$val]=0;
$i++;
}
}
}
return $node1;
}
/*
*dikjtra() function will calculate the path using bfs and relaxing algirithm
*at last , we also show the result making table
*/
function find_route($source,$destination,$min_dist,$min_time,$min_cost,$no_jam,$hour){
$query = "SELECT DISTINCT node1 FROM route ";
$result = $this->mysqli->query($query);
$i=0;
while($row = $result->fetch_assoc()){
foreach($row as $key=>$val){
$node1[$i]=$val;
$flag[$val]=0;
$i++;
}
}
$query = "SELECT DISTINCT node2 FROM route ";
$result = $this->mysqli->query($query);
while($row = $result->fetch_assoc()){
foreach($row as $key=>$val){
if(!isset($flag[$val])){
$node1[$i]=$val;
$flag[$val]=0;
$i++;
}
}
}
for($i=0;$i<count($node1);$i++){
for($j=0;$j<count($node1);$j++){
$array[$i][$j] = 0;
}
}
$query = "SELECT node1 FROM route ";
$result = $this->mysqli->query($query);
$i=0;
while($row = $result->fetch_assoc()){
foreach($row as $key=>$val){
$from[$i]=$val;
$i++;
}
}
$query = "SELECT node2 FROM route ";
$result = $this->mysqli->query($query);
$i=0;
while($row = $result->fetch_assoc()){
foreach($row as $key=>$val){
$to[$i]=$val;
$i++;
}
}
$query = "SELECT fair FROM route ";
$result = $this->mysqli->query($query);
$i=0;
while($row = $result->fetch_assoc()){
foreach($row as $key=>$val){
$fair[$i]=$val;
$i++;
}
}
$query = "SELECT time FROM route ";
$result = $this->mysqli->query($query);
$i=0;
while($row = $result->fetch_assoc()){
foreach($row as $key=>$val){
$time[$i]=$val;
$i++;
}
}
$query = "SELECT distance FROM route ";
$result = $this->mysqli->query($query);
$i=0;
while($row = $result->fetch_assoc()){
foreach($row as $key=>$val){
$distance[$i]=$val;
$i++;
}
}
$query = "SELECT jamcreator FROM route ";
$result = $this->mysqli->query($query);
$i=0;
while($row = $result->fetch_assoc()){
foreach($row as $key=>$val){
$jam[$i]=$val;
$i++;
}
}
$query = "SELECT bus_name FROM route ";
$result = $this->mysqli->query($query);
$i=0;
while($row = $result->fetch_assoc()){
foreach($row as $key=>$val){
$bus_name[$i]=$val;
$i++;
}
}
for($i=0;$i<count($node1);$i++){
$d[$node1[$i]] = 9999;
}
$d[$source] = 0;
$way[$source] = "";
for($i=0;$i<count($node1);$i++){
if($node1[$i]==$source){
$node1[$i]=$node1[0];
$node1[0] = $source;
}
}
$i=0;
$k=0;
$queuee[$i]=$source;
while (isset($queuee[$k])){
$u=$queuee[$k];
for($j=0;$j<count($from);$j++){
if($from[$j]==$u){
$v = $to[$j];
$value = 0;$l=0;
if($min_dist!='null'){
$value = $value + $distance[$j];
$l++;
}
if($time!='null'){
$value = $value + $time[$j];
if($jam[$j]!="null" && ($hour>=3 && $hour<=5) ){
$value = $value+30;
}
$l++;
}
if( $no_jam != 'null'){
if($jam[$j]=="school" && ($hour>=3 && $hour<=5) ){
$value = $value+30;
}
if($jam[$j] == 'jam'){
$value = $value+30;
}
$l++;
}
if($min_cost != 'null'){
$value = $value+$fair[$j];
$l++;
}
if($l==0){
$value=$distance[$j];
}
$alt = $d[$u]+$value;
if($alt<$d[$v]){
$d[$v] = $alt;
$prev[$v] = $u;
$way[$v] = $bus_name[$j];
$stack_dist[$v] = $distance[$j];;
$stack_time[$v] = $time[$j];
$stack_cost[$v] = $fair[$j];
$i++;
$queuee[$i]=$v;
}
}
elseif($to[$j]==$u){
$v = $from[$j];
$value = 0;$l=0;
if($min_dist!='null'){
$value = $value + $distance[$j];
$l++;
}
if($time!='null'){
$value = $value + $time[$j];
$l++;
}
if($min_cost != 'null'){
$value = $value+$fair[$j];
$l++;
}
if($l==0){
$value=$value+$distance[$j]+$time[$j]+$fair[$j];
}
$alt = $d[$u]+$value;
if($alt<$d[$v]){
$d[$v] = $alt;
$prev[$v] = $u;
$way[$v] = $bus_name[$j];
$stack_dist[$v] = $distance[$j];;
$stack_time[$v] = $time[$j];
$stack_cost[$v] = $fair[$j];
$i++;
$queuee[$i]=$v;
}
}
}
$k++;
}
// print_r($queuee);
//print_r($prev);
// print_r($way);
$v=$destination;
$j=0;
$stack_stopies[$j]=$v;
$stack_bus[$j]=$way[$v];
$j++;
while($v!=$source){
$v = $prev[$v];
$stack_stopies[$j]=$v;
$stack_bus[$j]=$way[$v];
$j++;
}
$total_distance = 0;
$total_cost = 0;
$total_time = 0;
for($j= count($stack_stopies)-1;$j>0;$j--){
//echo '<font color=blue>'.$stack_stopies[$j]."->". $stack_stopies[$j-1].'</font>'."<font color=orange size=25px> by </font>".'<font color=blue>'.$stack_bus[$j-1].'</font>'.' distance: '.$stack_dist[$stack_stopies[$j-1]].'km time: '.$stack_time[$stack_stopies[$j-1]].'min cost: '.$stack_cost[$stack_stopies[$j-1]].'tk<br>';
$total_distance = $total_distance+$stack_dist[$stack_stopies[$j-1]];
$total_cost =$total_cost + $stack_cost[$stack_stopies[$j-1]];
$total_time = $total_time + $stack_time[$stack_stopies[$j-1]];
}
//echo 'total distance: '.$total_distance.'km total time: '.$total_time.'minuite total cost: '.$total_cost.'taka ';
?>
<html>
<head>
<style>
table#t01 tr:nth-child(even) {
background-color: #eee;
}
table#t01 tr:nth-child(odd) {
background-color:#fff;
}
table#t01 th {
background-color: black;
color: white;
}
</style>
</head>
<body>
<table id="t01" style="width:50%">
<tr>
<th>From</th>
<th>To</th>
<th>By</th>
<th>Distance</th>
<th>Cost</th>
<th>Time</th>
</tr>
<?php for($j= count($stack_stopies)-1;$j>0;$j--){ ?>
<tr>
<td><?php echo $stack_stopies[$j];?></td>
<td><?php echo $stack_stopies[$j-1];?></td>
<td><?php echo $stack_bus[$j-1];?> </td>
<td><?php echo $stack_dist[$stack_stopies[$j-1]].' km';?></td>
<td><?php echo $stack_cost[$stack_stopies[$j-1]].' taka';?></td>
<td><?php echo $stack_time[$stack_stopies[$j-1]].' minuite';?></td>
</tr>
<?php } ?>
<tr>
<td><?php echo '<font color=blue size=4px>'.$source.'</font>' ;?></td>
<td><?php echo '<font color=blue size=4px>'.$destination.'</font>' ;?></td>
<td></td>
<td><?php echo '<font color=blue >'.'total= '.$total_distance.' km'.'</font>';?></td>
<td><?php echo '<font color=blue >'.'total= '.$total_cost.' taka'.'</font>';?></td>
<td><?php echo '<font color=blue >'.'total= '.$total_time.' minuite'.'</font';?></td>
</tr>
</table>
</body>
</html>
<?php
}
}