function gradeShowInfo($row)
{
    echo '<p><a href="grades.php">Back to All Grades</a>' . "</p><p>\n";
    echo "User Name: " . htmlent_utf8($row['displayname']) . "<br/>\n";
    echo "User Email: " . htmlent_utf8($row['email']) . "<br/>\n";
    echo "Last Submision: " . htmlent_utf8($row['updated_at']) . "<br/>\n";
    echo "Score: " . htmlent_utf8($row['grade']) . "<br/>\n";
    echo "</p>\n";
}

function var_dump_pre($variable, $print = true)
{
    ob_start();
    var_dump($variable);
    $result = ob_get_clean();
    if ($print) {
        print htmlent_utf8($result);
    }
    return $result;
}

<form method="post">
Service URL: <input type="text" name="content_item_return_url" size="120" value="<?php 
echo htmlentities($result_url);
?>
"/></br>
OAuth Consumer Key: <input type="text" name="oauth_consumer_key" size="80" value="<?php 
echo htmlentities($oauth_consumer_key);
?>
"/></br>
OAuth Consumer Secret: <input type="text" name="secret" size="80" value="<?php 
echo htmlentities($oauth_consumer_secret);
?>
"/></br>
<br/>
Content URL to send: </br>
<input type="text" name="content_url" 
size="80" value="<?php 
echo htmlent_utf8($content_url);
?>
"/>
</p><p>
Opaque Data: </br>
<textarea name="data" rows=5 cols=80>
<?php 
echo htmlent_utf8($data);
?>
</textarea>
</p><p>
<input type='submit' name='send' value="Send Content Response">
</form>

function success_out($output)
{
    echo '<span style="color:green"><strong>' . htmlent_utf8($output) . "</strong></span><br/>\n";
    flush();
}

<?php

require_once "webauto.php";
use Goutte\Client;
line_out("Grading PHP-Intro Assignment 2");
$url = getUrl('http://csevumich.byethost18.com/howdy.php');
if ($url === false) {
    return;
}
$grade = 0;
error_log("ASSN02 " . $url);
line_out("Retrieving " . htmlent_utf8($url) . "...");
flush();
// http://symfony.com/doc/current/components/dom_crawler.html
$client = new Client();
$crawler = $client->request('GET', $url);
$html = $crawler->html();
$OUTPUT->togglePre("Show retrieved page", $html);
line_out("Searching for h1 tag...");
$passed = 0;
$titlefound = false;
try {
    $h1 = $crawler->filter('h1')->text();
    line_out("Found h1 tag...");
} catch (Exception $ex) {
    error_out("Did not find h1 tag");
    $h1 = "";
}
if (stripos($h1, 'Hello') !== false) {
    success_out("Found 'Hello' in the h1 tag");
    $passed += 1;

 /**
  *  Generate the HTML for an update form.
  *
  * Here is a sample call:
  *
  *     $from_location = "keys.php";
  *     $fields = array("key_key", "key_sha256", "secret", "created_at", "updated_at");
  *     $current = getCurrentFileUrl(__FILE__);
  *     $retval = CrudForm::updateForm($row, $fields, $current, $from_location, true, true);
  *
  * @param $row The existing data for the fields.
  * @param $fields An array of fields to be shown.
  * @param $current The URL of the current HTML page.
  * @param $from_location A URL to jump to when the user presses 'Cancel'.
  * @param $allow_edit True/false as to whether to show an Edit button
  * @param $allow_delete True/false as to whether to show a Delete button
  * @param $extra_buttons An array of additional buttons to show
  */
 public static function updateForm($row, $fields, $current, $from_location, $allow_edit = false, $allow_delete = false, $extra_buttons = false)
 {
     $key = $fields['0'];
     if (!isset($_REQUEST[$key])) {
         return "Required {$key}= parameter";
     }
     $key_value = $_REQUEST[$key] + 0;
     $do_edit = isset($_REQUEST['edit']) && $_REQUEST['edit'] == 'yes';
     echo '<form method="post">' . "\n";
     echo '<a href="' . $from_location . '" class="btn btn-default">' . _m('Exit') . '</a>' . "\n";
     if ($allow_edit) {
         if ($do_edit) {
             echo '<input type="submit" name="doUpdate" class="btn btn-normal" value="' . _m("Update") . '">' . "\n";
             echo '<a href="' . $current . '?' . $key . '=' . $key_value . '" class="btn btn-success">' . _m("Cancel Edit") . '</a>' . "\n";
         } else {
             echo '<a href="' . $current . '?' . $key . '=' . $key_value . '&edit=yes" class="btn btn-warning">' . _m("Edit") . '</a>' . "\n";
         }
     }
     if (is_array($extra_buttons)) {
         foreach ($extra_buttons as $button_text => $button_url) {
             echo '<a href="' . $button_url . '" class="btn btn-success">' . _m($button_text) . '</a>' . "\n";
         }
     }
     if ($allow_delete) {
         echo '<input type="hidden" name="' . $key . '" value="' . $key_value . '">' . "\n";
         echo '<input type="submit" name="doDelete" class="btn btn-danger" value="' . _m("Delete") . '"';
         echo " onclick=\"return confirm('Are you sure you want to delete this record?');\">\n";
     }
     echo "<p>\n";
     for ($i = 0; $i < count($fields); $i++) {
         $field = $fields[$i];
         $value = $row[$field];
         if (!$do_edit) {
             echo '<p><strong>' . self::fieldToTitle($field) . "</strong></p>\n";
             if (strpos($field, "secret") !== false) {
                 echo "<p onclick=\"\$('#stars_{$i}').toggle();\$('#text_{$i}').toggle();\">\n";
                 echo "<span id=\"stars_{$i}\">***********</span>\n";
                 echo "<span style=\"display: none;\" id=\"text_{$i}\">" . htmlent_utf8($value) . '</span>';
                 echo "\n</p>\n";
             } else {
                 echo "<p>" . htmlent_utf8($value) . "</p>\n";
             }
             continue;
         }
         if ($i == 0 && strpos($field, "_id") !== false) {
             echo '<input type="hidden" name="' . $field . '" value="' . htmlent_utf8($value) . '">' . "\n";
             continue;
         }
         // Don't allow explicit updating of these fields
         if (strpos($field, "_at") > 0) {
             continue;
         }
         echo '<div class="form-group">' . "\n";
         echo '<label for="' . $field . '">' . self::fieldToTitle($field) . "<br/>\n";
         if (isset($_POST[$field])) {
             $value = $_POST[$field];
         }
         if (strpos($field, "secret") !== false) {
             echo '<input id="' . $field . '" type="password" size="80" name="' . $field . '" value="' . htmlent_utf8($value) . '"';
             echo "onclick=\"if ( \$(this).attr('type') == 'text' ) \$(this).attr('type','password'); else \$(this).attr('type','text'); return false;\">\n";
         } else {
             if (strlen($value) > 60) {
                 echo '<textarea rows="10" cols="70" id="' . $field . '" name="' . $field . '">' . htmlent_utf8($value) . '</textarea>' . "\n";
             } else {
                 echo '<input type="text" size="80" id="' . $field . '" name="' . $field . '" value="' . htmlent_utf8($value) . '">' . "\n";
             }
         }
         echo "</label>\n</div>";
     }
     echo '</form>' . "\n";
     return true;
 }

require_once $CFG->dirroot . "/pdo.php";
require_once $CFG->dirroot . "/lib/lms_lib.php";
use Tsugi\Core\LTIX;
// Sanity checks
$LTI = LTIX::requireData();
$p = $CFG->dbprefix;
// The reset operation is a normal POST - not AJAX
if ($USER->instructor && isset($_POST['reset'])) {
    $PDOX->queryDie("DELETE FROM {$p}rps WHERE link_id = :LI", array(':LI' => $LINK->id));
    header('Location: ' . addSession('index.php'));
    return;
}
?>
<html><head><title><?php 
_e("Playing Rock Paper Scissors in");
echo htmlent_utf8($CONTEXT->title);
?>
</title>
<script type="text/javascript"
src="<?php 
echo $CFG->staticroot;
?>
/static/js/jquery-1.10.2.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
  window.console && console.log('Hello JQuery..');
  $("#rock").click( function() { play(0); } ) ;
  $("#paper").click( function() { play(1); } ) ;
  $("#scissors").click( function() { play(2); } ) ;
});

</p>
  <div class="control-group pull-right hidden-phone">
      <button type="submit" style="margin-top: 40px" class="btn btn-primary">Save Profile Data</button>
  </div>

  <div id="map_canvas" style="margin: 10px; width:400px; max-width: 100%; height:400px"></div>

  <div id="latlong" style="display:none" class="control-group">
    <p>Latitude: <input size="30" type="text" id="latbox" name="lat" class="disabled"
    <?php 
    echo ' value="' . htmlent_utf8($lat) . '" ';
    ?>
    ></p>
    <p>Longitude: <input size="30" type="text" id="lngbox" name="lng" class="disabled"
    <?php 
    echo ' value="' . htmlent_utf8($lng) . '" ';
    ?>
    ></p>
  </div>

<p>
If you don't even want to reveal your country, put yourself
in Greenland in the middle of a glacier. One person put their location
in the middle of a bar.  :)
</p>
<?php 
}
?>
</form>
<?php 
// After jquery gets loaded at the *very* end...

// View
$OUTPUT->header();
$OUTPUT->bodyStart();
$OUTPUT->flashMessages();
$OUTPUT->welcomeUserCourse();
$foldername = getFolderName();
if (!file_exists($foldername)) {
    mkdir($foldername);
}
$stmt = $PDOX->prepare("SELECT file_id, file_name FROM {$p}sample_blob\n        WHERE context_id = :CI");
$stmt->execute(array(":CI" => $CONTEXT->id));
$count = 0;
while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
    $id = $row['file_id'];
    $fn = $row['file_name'];
    echo '<li><a href="blob_serve.php?id=' . $id . '" target="_new">' . htmlent_utf8($fn) . '</a>';
    if ($USER->instructor) {
        echo ' (<a href="blob_delete.php?id=' . $id . '">Delete</a>)';
    }
    echo '</li>';
    $count++;
}
if ($count == 0) {
    echo "<p>No Files Found</p>\n";
}
echo "</ul>\n";
if ($USER->instructor) {
    ?>
<h4>Upload file (max <?php 
    echo maxUpload();
    ?>

        <form id="prefs_form">
            <?php 
    if ($firstname === false) {
        ?>
                <input type="checkbox" name="allow_first" style="display:hidden">
            <?php 
    } else {
        ?>
                <input type="checkbox" name="allow_first" <?php 
        if ($row['first'] == 1) {
            echo "checked";
        }
        ?>
            >
            Share your first name (<?php 
        echo htmlent_utf8($firstname);
        ?>
) on the map<br/>
            <?php 
    }
    ?>
            <input type="checkbox" name="allow_name" <?php 
    if (!isset($USER->displayname)) {
        echo ' style="display:hidden"';
    } else {
        if ($row['name'] == 1) {
            echo "checked";
        }
    }
    ?>
            >

            echo "<th>Action</th>";
        }
        echo "</tr>\n";
        $max_points = false;
        foreach ($our_grades as $grade) {
            if ($assn_json->peerpoints > 0) {
                if ($max_points === false) {
                    $max_points = $grade['points'];
                }
                $show = $grade['points'];
                if ($show < $max_points) {
                    $show = '';
                }
                echo "<tr><td>" . $show . "</td>";
            }
            echo "<td>" . htmlent_utf8($grade['note']) . "</td>\n";
            if ($assn_json->flag) {
                echo '<td><form><input type="submit" name="showFlag" value="Flag"' . 'onclick="$(\'#flag_grade_id\').val(\'' . $grade['grade_id'] . '\'); $(\'#flagform\').toggle(); return false;" class="btn btn-danger">' . '</form></td>';
            }
            echo "</tr>\n";
        }
        echo "</table>\n";
        if ($max_points !== false) {
            echo "<p>Your overall score from your peers: {$max_points} </p>\n";
        }
    }
}
$OUTPUT->exitButton();
?>
<form method="post" id="flagform" style="display:none">
<p>&nbsp;</p>

<?php

require_once "../../config.php";
require_once $CFG->dirroot . "/pdo.php";
require_once $CFG->dirroot . "/lib/lms_lib.php";
require_once $CFG->dirroot . "/core/gradebook/lib.php";
session_start();
// Get the user's grade data also checks session
$row = gradeLoad($_REQUEST['user_id']);
// View
$OUTPUT->header();
$OUTPUT->bodyStart();
$OUTPUT->flashMessages();
// Show the basic info for this user
gradeShowInfo($row);
// Unique detail
echo "<p>Submission:</p>\n";
$json = json_decode($row['json']);
if (is_object($json) && isset($json->code)) {
    echo "<pre>\n";
    echo htmlent_utf8($json->code);
    echo "\n";
    echo "</pre>\n";
}
$OUTPUT->footer();

                    $debugin = get_body_sent_debug();
                    $debugout = get_body_received_debug();
                } else {
                    if (isset($_REQUEST['set_proxy'])) {
                        $postBody = true;
                        $response = sendOAuthBody("PUT", $proxy_url, $oauth_consumer_key, $oauth_consumer_secret, $content_type, $settings);
                        $debugin = get_body_sent_debug();
                        $debugout = get_body_received_debug();
                    } else {
                        exit;
                    }
                }
            }
        }
    }
}
global $LastOAuthBodyBaseString;
$lbs = $LastOAuthBodyBaseString;
ltiUtilTogglePre("Sent Headers", $debugin);
if ($postBody !== false) {
    ltiUtilTogglePre("Our Body Data", indent($settings));
}
ltiUtilTogglePre("Our Base String", $lbs);
ltiUtilTogglePre("Results and Headers", $debugout);
if (strlen($response) < 1) {
    echo "<p>HTTP Response Body empty.</p>\n";
} else {
    echo "<br/><b>Returned data:</b>\n<pre>\n";
    echo htmlent_utf8(indent($response));
    echo "\n</pre>\n";
}

        if ($data) {
            $parms['data'] = $data;
        }
        $parms = LTIX::signParameters($parms, $result_url, "POST", "Install Tool");
        $endform = '<a href="index.php" class="btn btn-warning">Back to Store</a>';
        $content = LTI::postLaunchHTML($parms, $result_url, true, false, $endform);
        echo $content;
    } else {
        echo '<div style="border: 2px, solid, red;" class="card">';
        if ($fa_icon) {
            echo '<a href="index.php?install=' . urlencode($tool) . '">';
            echo '<i class="fa ' . $fa_icon . ' fa-2x" style="color: #1894C7; float:right; margin: 2px"></i>';
            echo '</a>';
        }
        echo '<p><strong>' . htmlent_utf8($title) . "</strong></p>";
        echo '<p>' . htmlent_utf8($text) . "</p>\n";
        echo '<center><a href="index.php?install=' . urlencode($tool) . '" class="btn btn-default" role="button">Details</a></center>';
        echo "</div>\n";
    }
    $toolcount++;
}
echo "</div>\n";
if ($toolcount < 1) {
    lmsDie("No tools to register..");
}
$OUTPUT->footerStart();
// https://github.com/LinZap/jquery.waterfall
if (!$install) {
    ?>
<script type="text/javascript" src="static/waterfall-light.js"></script>
<script>

?>
</head>
<body style="font-family:sans-serif; background-color:#add8e6">
<p><b>Calling IMS LTI Content Item Service</b></p>
<?php 
?>
<p>
<form method="post">
Service URL: <input type="text" name="url" size="120" value="<?php 
echo htmlentities($result_url);
?>
"/></br>
OAuth Consumer Key: <input type="text" name="key" size="80" value="<?php 
echo htmlentities($oauth_consumer_key);
?>
"/></br>
OAuth Consumer Secret: <input type="text" name="secret" size="80" value="<?php 
echo htmlentities($oauth_consumer_secret);
?>
"/></br>
</p><p>
Content URL to send: </br>
<input type="text" name="content_url" 
size="80" value="<?php 
echo htmlent_utf8($content_url);
?>
"/>
</p><p>
<input type='submit' name='send' value="Send Content Response">
</form>

 /**
  * Welcome the user to the course
  */
 function welcomeUserCourse()
 {
     global $USER, $CONTEXT;
     if (isset($USER->displayname)) {
         if (isset($CONTEXT->title)) {
             printf(_m("<p>Welcome %s from %s"), htmlent_utf8($USER->displayname), htmlent_utf8($CONTEXT->title));
         } else {
             printf(_m("<p>Welcome %s"), htmlent_utf8($USER->displayname));
         }
     } else {
         if (isset($CONTEXT->title)) {
             printf(_m("<p>Welcome from %s"), htmlent_utf8($CONTEXT->title));
         } else {
             printf(_m("<p>Welcome "));
         }
     }
     if ($USER->instructor) {
         echo " " . _m("(Instructor)");
     }
     echo "</p>\n";
 }

<a href="http://www.imsglobal.org/question/" target="_blank">QTI 1.2.1</a>.
</p><p>
This is still a <a href="https://github.com/csev/gift2qti" target="_blank">work in progress</a>
and currently only supports single-answer multiple-choice, true/false, and essay questions.
The sample text below has some GIFT formats that this tool does not yet support so some of the questions
below will not be converted.  Feel free to send me a Pull request on gitHub :).
</p>
<form method="post" action="process.php" target="working" style="margin:20px;">
<p style="float:right">
<input type="submit" name="submit" class="btn btn-primary" value="Convert GIFT to QTI"
onclick="$('#myModal').modal('show');"></p>
<p>Quiz Title: <input type="text" name="title" size="60" value="Converted using GIFT2QTI"/></p>
<p>Quiz File Name (no suffix): <input type="text" name="name" size="30"/> (optional)</p>
<textarea rows="30" style="width: 98%" name="text">
<?php 
echo htmlent_utf8($text);
?>
</textarea>
<p><input type="checkbox" name="bypass" value="bypass">
Do not validate the XML</p>
</form>
<p>If you want to add this tool to the <b>Settings -&gt; Import Content</b>
in the Canvas LMS use this URL:
<a href="<?php 
echo $config_url;
?>
" target="_blank"><?php 
echo $config_url;
?>
</a>
</p>

togglePre("Registration Response", htmlent_utf8(json_indent($response)));
$tc_half_shared_secret = false;
if ($last_http_response == 201 || $last_http_response == 200) {
    if ($oauth_splitsecret && $tp_half_shared_secret) {
        $responseObject = json_decode($response);
        if (isset($responseObject->tc_half_shared_secret)) {
            $tc_half_shared_secret = $responseObject->tc_half_shared_secret;
            echo "<p>tc_half_shared_secret: " . $tc_half_shared_secret . "</p>\n";
            if (strlen($tc_half_shared_secret) != 128) {
                echo '<p style="color: red">Warning secret length of ' . strlen($tc_half_shared_secret) . " should be 128</p>\n";
            }
            $split_secret = $tc_half_shared_secret . $tp_half_shared_secret;
            $_SESSION['split_secret'] = $split_secret;
            echo "<p>Split Secret: " . $split_secret . "</p>\n";
        } else {
            echo "<p>Error: Tool Consumer did not provide oauth_splitsecret</p>\n";
        }
    }
    echo '<p><a href="' . $launch_presentation_return_url . '">Continue to launch_presentation_url</a></p>' . "\n";
    exit;
}
echo "Registration failed, http code=" . $last_http_response . "\n";
// Check to see if they slid us the base string...
$responseObject = json_decode($response);
if ($responseObject != null) {
    $base_string = $responseObject->base_string;
    if (strlen($base_string) > 0 && strlen($LastOAuthBodyBaseString) > 0 && $base_string != $LastOAuthBodyBaseString) {
        $compare = compare_base_strings($LastOAuthBodyBaseString, $base_string);
        togglePre("Compare Base Strings (ours first)", htmlent_utf8($compare));
    }
}

    }
    // High guess
    $u = $url . "?guess=" . rand(45, 2000);
    line_out("Retrieving " . htmlent_utf8($u));
    $crawler = $client->request('GET', $u);
    $html = $crawler->html();
    $OUTPUT->togglePre("Show retrieved page", $html);
    line_out("Looking for 'Your guess is too high'");
    if (stripos($html, 'Your guess is too high') > 0) {
        $passed++;
    } else {
        error_out("Not found");
    }
    // Good guess
    $u = $url . "?guess=42";
    line_out("Retrieving " . htmlent_utf8($u));
    $crawler = $client->request('GET', $u);
    $html = $crawler->html();
    $OUTPUT->togglePre("Show retrieved page", $html);
    line_out("Looking for 'Congratulations - You are right'");
    if (stripos($html, 'congratulations') > 0) {
        $passed++;
    } else {
        error_out("Not found");
    }
} catch (Exception $ex) {
    error_out("The autograder did not find something it was looking for in your HTML - test ended.");
    error_log($ex->getMessage());
    error_log($ex->getTraceAsString());
    $detail = "This indicates the source code line where the test stopped.\n" . "It may not make any sense without looking at the source code for the test.\n" . 'Caught exception: ' . $ex->getMessage() . "\n" . $ex->getTraceAsString() . "\n";
    $OUTPUT->togglePre("Internal error detail.", $detail);

function showSubmission($LTI, $assn_json, $submit_json)
{
    echo '<div style="padding:5px">';
    $blob_ids = $submit_json->blob_ids;
    $urls = isset($submit_json->urls) ? $submit_json->urls : array();
    $blobno = 0;
    $urlno = 0;
    foreach ($assn_json->parts as $part) {
        if ($part->type == "image") {
            // This test triggeres when an assignment is reconfigured
            // and old submissions have too few blobs
            if ($blobno >= count($blob_ids)) {
                continue;
            }
            $blob_id = $blob_ids[$blobno++];
            if (is_array($blob_id)) {
                $blob_id = $blob_id[0];
            }
            $url = getAccessUrlForBlob($blob_id);
            $title = 'Student image';
            if (isset($part->title) && strlen($part->title) > 0) {
                $title = $part->title;
            }
            echo ' <a href="#" onclick="$(\'#myModal_' . $blobno . '\').modal();"';
            echo 'alt="' . htmlent_utf8($title) . '" title="' . htmlent_utf8($title) . '">';
            echo '<img src="' . addSession($url) . '" width="240"></a>' . "\n";
            ?>
<div class="modal fade" id="myModal_<?php 
            echo $blobno;
            ?>
">
  <div class="modal-dialog modal-lg">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
        <h4 class="modal-title"><?php 
            echo htmlent_utf8($title);
            ?>
</h4>
      </div>
      <div class="modal-body">
        <img src="<?php 
            echo addSession($url);
            ?>
" style="width:100%">
      </div>
    </div><!-- /.modal-content -->
  </div><!-- /.modal-dialog -->
</div><!-- /.modal -->
<?php 
        } else {
            if ($part->type == "url") {
                $url = $urls[$urlno++];
                echo '<p><a href="' . safe_href($url) . '" target="_blank">';
                echo htmlentities(safe_href($url)) . '</a> (Will launch in new window)</p>' . "\n";
            }
        }
    }
    echo "<br/>&nbsp;<br/>\n";
    if ($blobno > 0) {
        echo "<p>Click on each image to see a larger view of the image.</p>\n";
    }
    if (strlen($submit_json->notes) > 1) {
        echo "<p>Notes: " . htmlent_utf8($submit_json->notes) . "</p>\n";
    }
    echo '<div style="padding:3px">';
}