Please HELP!!!

scottg1017 · September 24, 2019

Disclaimer: I am extremely new to programming! I have taken one C++ class and am currently taking a PHP class. I have an assignment to "Create a Web form that shows the mileage between European capitals. Use a two-dimensional associative array to store the mileages."

I have wrote the code, moved it around to different places, deleted things, added things, and I continuously get error message that says it was expecting the end of the file. I will post what I have below. I am looking for guided help and not just the answer. I have re-read the chapter and if I'm being honest, I don't completely understand it. This is our 7 or 8th assignment and this is the first one I have had to reach out for help. I appreciate any assistance that anyone is willing to give. Thanks in advance!

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"
    lang="en">
    <head>
        <meta http-equiv="Content-Type"
                content="text/html; charset=iso-8859-1" />
        <title>European Travel</title>
    </head>
    <body>
        <p>
            </p>
    </body>

</html>

<?php
$Distances = array(
    "Berlin" => array(
        "Berlin" => 0,
        "Moscow" =>1607.99,
        "Paris" => 876.96,
        "Prague" => 280.34,
        "Rome" => 1181.67
    ),
    "Moscow" => array(
        "Berlin" => 1607.99,
        "Moscow" => 0,
        "Paris" => 2484.92,
        "Prague" => 1664.04,
        "Rome" => 2374.26
    ),
    "Paris" => array(
        "Berlin" => 876.96,
        "Moscow" => 641.31,
        "Paris" => 0,
        "Prague" => 885.38,
        "Rome" => 1105.76
    ),
    "Prague" => array(
        "Berlin" => 280.34,
        "Moscow" => 1664.04,
        "Paris" => 885.38,
        "Prague" => 0,
        "Rome" => 922
    ),
    "Rome" => array(
        "Berlin" => 1181.67,
        "Moscow" => 2374.26,
        "Paris" => 1105.76,
        "Prague" => 922,
        "Rome" => 0
    )
);
$StartIndex = "";
 $EndIndex = "";
 $KMtoMiles = 0.62;
    if (isset($_POST['submit'])) {
            $StartIndex = stripslashes($_POST['Start']);
            $EndIndex = stripslashes($_POST['End']);
            if (isset(
                    $Distances[$StartIndex][$EndIndex]))
                    echo "<p>The distance from $StartIndex
                        to $EndIndex is " .
                        $Distances[$StartIndex][$EndIndex]
                        . " kilometers, or " . round(
                        ($KMtoMiles *
                        $Distances[$StartIndex][$EndIndex]),
                        2) . " miles.</p>\n";
                else
                    echo "<p>The distance from $StartIndex
                            to $EndIndex is not in the 
                            array.</p>\n";
    }
                foreach ($Distances as
                        $City => $OtherCities) {
                        echo "<option value='$City'";
                        if (strcmp($StartIndex,$City)==0)
                            echo " selected";
                        echo ">$City</option>\n";
                        }
                foreach ($Distances as
                        $City => $OtherCities) {
                        echo "<option value='$City'";
                        if (strcmp($EndIndex,$City)==0)
                            echo " selected";
                        echo ">$City</option>\n";
                        }
    <form action="EuropeanTravel.php" method="post">
    <p>Starting City:
    <select name="Start">
    </select></p>
    <p>Ending City:
    <select name="End">
    </select></p>
    <p><input type="submit" name="submit"
        value="Calculate Distance" /></p>
    </form>    
    ?>

gw1500se · September 24, 2019

Your ?> is misplaced. It needs to be at the end of the PHP code and before the HTML code.

Barand · September 24, 2019

Just about all of your code is misplaced.

The PHP code should be first. (except for output which should be in the html/body section
Your <form> should be in the html/body section.
Your <options>..</options>s should be between the <select>..</select> tags

plus your course material appears to be many years out of date.

Edited September 24, 2019 by Barand

scottg1017 · September 25, 2019

I really appreciate you guys pointing me in the right direction. I was able to move two sections of my code and it works like a champ! I'm sure I will be back with something else that has stumped me and will be trivial for the group, but, I appreciate the help. I am a 42 year old college student and things just don't click like they once did.

Barand · September 25, 2019

This was my rearrangement of your code

<?php
const KM2MILES = 0.62;

$Distances = array(
        "Berlin" => array(
            "Berlin" => 0,
            "Moscow" =>1607.99,
            "Paris" => 876.96,
            "Prague" => 280.34,
            "Rome" => 1181.67
        ),
        "Moscow" => array(
            "Berlin" => 1607.99,
            "Moscow" => 0,
            "Paris" => 2484.92,
            "Prague" => 1664.04,
            "Rome" => 2374.26
        ),
        "Paris" => array(
            "Berlin" => 876.96,
            "Moscow" => 641.31,
            "Paris" => 0,
            "Prague" => 885.38,
            "Rome" => 1105.76
        ),
        "Prague" => array(
            "Berlin" => 280.34,
            "Moscow" => 1664.04,
            "Paris" => 885.38,
            "Prague" => 0,
            "Rome" => 922
        ),
        "Rome" => array(
            "Berlin" => 1181.67,
            "Moscow" => 2374.26,
            "Paris" => 1105.76,
            "Prague" => 922,
            "Rome" => 0
        )
    );

/**
* convert Km to miles
*     
* @param float $km     distance in Kilometers
* @return string miles
*/
        function toMiles($km)
        {
            return number_format($km * KM2MILES, 2);
        }

/**
* create list of city options
* 
* @param array $Distances    distances array
* @param string $current     currently selected city
* @return string list of options
*/
        function cityOptions($Distances, $current)
        {
            $opts = "<option value=''> - Select city -</option>";
            foreach (array_keys($Distances) as $city) {
                $sel = $city == $current ? 'selected' : '';
                $opts .= "<option $sel> $city</option>";
            }
            return $opts;
        }

//
//   Initialise output variables
//
$StartIndex = "";
$EndIndex = "";
$kms = 0;;

//
//  Was form data posted?
//    
if ($_SERVER['REQUEST_METHOD']=='POST') {

    $StartIndex = $_POST['Start'] ?? '';
    $EndIndex = $_POST['End'] ?? '';
    $kms = $Distances[$StartIndex][$EndIndex] ?? 0;;
    
}
?>
 <!DOCTYPE html >
 <html>
    <head>
        <meta http-equiv="content-language" content="en">
        <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
        <title>European Travel</title>
    </head>
    <body>
       <form action="" method="post">
        <p>Starting City:
        <select name="Start">
            <?=cityOptions($Distances, $StartIndex)?>
        </select></p>
        <p>Ending City:
        <select name="End">
            <?=cityOptions($Distances, $EndIndex)?>
        </select></p>
        <p><input type="submit" name="btnSubmit"
            value="Calculate Distance" /></p>
        </form>
        <br><br>
        Distance <br><?=$kms?> Km
        <br><?=toMiles($kms)?> Miles    
    </body>

</html>

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