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<?
// JimMartinson/CST1146/Labs/Lab08/Lab08.phpinc

#if ( $_SESSION['userId'] == 1 ) $showEvaluationVariables = true;
require('Gradebook/EvaluationSubmission_BEGIN.phpinc'); // Replaced.
#if ( $_SESSION['userId'] != 1 ) { require('Gradebook/EvaluationSubmission_END.phpinc'); exit; }
include('common/Browser/Browser.phpinc');

$disabled = '';
$disabled = ' disabled'; // Comment this line to enable lab.

// NOTE: Disable Include conf/extra/httpd-autoindex.conf line in the httpd.conf file before labs.
// OR: Fix labs so Lab 4 mod_autoindex works as it should.
?>
<fieldset><legend><?=$evaluationType?> <?=$evaluationNumber?> Description</legend>
The purpose of this lab is to demonstrate the use of php forms.
	<br><b class="warning">Warning: Do not perform this lab until <?=labLink(7,false,'')?> has been performed.
	<br>The <b>application.php</b> file from lab 7 is needed for this lab.</b>
<?=$gradeNote?>
<? if ( $disabled ) { ?><span class="error bold">Notice: Do not perform this assignment unless this notice has been removed.</span><? } ?>
</fieldset>

<fieldset><legend><?=$evaluationType?> <?=$evaluationNumber?> Instruction</legend>
<ol class="count">
	<!-- 1 -->
	<li>Create a directory called <b class="copyText"><?=$evaluationName?></b> in your <b><?=$dataFolder?><?=$dirSep?><?=$courseNumber?></b> directory. We will use it for all work performed in this lab.</li>
	<!-- 2 -->
	<li>Copy the <b>application.php</b> file from lab 7 into your <b><?=$evaluationName?></b> folder.
	</li>
	<!-- 3 -->
	<li>Create a function called <b class="copyText php">formValue</b> in the <b>application.php</b> file that will gather values submitted by a form:
		<ol>
			<li>The <b class="php">formValue</b> function will take two parameters: <b class="copyText php">$formVariable</b> and <b class="copyText php">$defaultValue</b>.</li>
			<li><b class="php">$formVariable</b> can take four possible value types:
				<ol>
					<li>A single string  of a form value name: <note>e.g. 'foo'</note>
						<ol>
							<li>Check the $_GET variable for a form variable with that name and remember the value.</li>
							<li>Check the $_POST variable for a form variable with that name and remember the value.</li>
							<li>If the form variable name was not found remember the <span class="bold">$defaultValue</span> or <span class="code">NULL</span> if $defaultValue was not set.</li>
							<li>Return the remembered value. <span class="note">Not as an array.</span></li>
						</ol>
					</li>
					<li>A string with a comma separated list of form value names: <note>e.g. 'foo,bar'</note>
						<ol>
							<li>The list is changed into an array of these form value names.</li>
							<li>Then process this array as if it was originally submitted as an array of form value names as below in step 3.2.3</li>
						</ol>
					</li>
					<li>An array of form value names: <note>e.g. array('foo','bar')</note>
						<ol>
							<li>For each index in the array, perform:
								<ol>
									<li>Check the $_GET variable for a form variable with that name and remember the value.</li>
									<li>Check the $_POST variable for a form variable with that name and remember the value.</li>
									<li>If the form variable name was not found set the value to <span class="code">NULL</span>.</li>
									<li>Save the value in an indexed array with the index equal to the  form variable name.</li>
								</ol>
							</li>
							<li>Return the indexed array of values.</li>
						</ol>
					</li>
					<li>No value:
						<ol>
							<li>Create an array with no values.</li>
							<li>Loop thru the $_GET array and for each form variable found add an index with the name found set to the value sent by the form.</li>
							<li>Loop thru the $_POST array and for each form variable found add an index with the name found set to the value sent by the form.</li>
							<li>Return the indexed array of values.</li>
						</ol>
					</li>
				</ol>
				<span class="note">Ensure that all form values are run thru
					<a class="php" href="https://www.php.net/manual/en/function.trim.php" target="_blank">trim()</a>
					and 
					<a class="php" href="https://www.php.net/manual/en/function.htmlspecialchars.php" target="_blank">htmlspecialchars()</a>
					before being saved.</span>
			</li>
			<li><b class="php">$defaultValue</b> can take two possible values:
				<ol>
					<li>No value:
						<br>Form value names that were not sent by the form are given a default value of <span class="code">NULL</span>.
					</li>
					<li>A default value: <span class="note">May only be used when called with a single form value name.</span>
						<br>Form value names that were sent by the form are set to the value sent.
						<br>Form value names that were not sent by the form are set the value of the <span class="php">$defaultValue</span> variable.
					</li>
				</ol>
			</li>
		</ol>
		<span class="note">The <b>formValue</b> function will return a single value only when called with a single form value name, otherwise, an indexed array is returned.</span>
		<br><span class="note">I found the <a class="php" href="https://www.php.net/manual/en/function.count.php" target="_blank">count()</a>, <a class="php" href="https://www.php.net/manual/en/function.explode.php" target="_blank">explode()</a>, <a class="php" href="https://www.php.net/manual/en/function.is-array.php" target="_blank">is_array()</a>, and <a class="php" href="https://www.php.net/manual/en/function.isset.php" target="_blank">isset()</a> functions as well as the <a class="php" href="https://www.php.net/manual/en/control-structures.foreach.php" target="_blank">foreach</a> statement useful when coding the <b>formValue</b> function.</span>
	</li>
	<!-- 4 -->
	<li>Code a PHP file to submit a form:
		<ol>
			<li>Create a PHP file named <b class="copyText"><?=$saveFilename?>_Form.php</b> in the <b><?=$evaluationName?></b> directory and open it in an editor.</li>
			<li>Include the <b>application.php</b> file.</li>
			<li>Call the <b class="php">beginPage</b> function with a parameter of <b class="copyText">Form test</b>.</li>
			<li>Set <b class="copyText">$f</b> equal to the return value of <b class="php">formValue()</b>.</li>
			<li>If <b class="copyText">$f['form']</b> is set and equals  <b class="copyText">form_test</b> require the <b class="copyText"><?=$saveFilename?>_Perform.php</b> page.</li>
			<li>Create a form with the following attributes and elements:
				<ol>
					<li>The <b class="html">action</b> attribute is set so the page loads itself upon submit.</li>
					<li>The <b class="html">method</b> attribute is set to <b class="html">post</b>.</li>
					<li>An  <b class="html">input</b> element of <b class="html">type</b> <b class="html">hidden</b> named <b class="copyText html">form</b> with the <b class="html">value</b> of <b class="copyText code">form_test</b>.</li>
					<li>An <b class="html">input</b> element of <b class="html">type</b> <b class="html">hidden</b> named <b class="copyText html">myName</b> with the <b class="html">value</b> of <b class="copyText code"><?=$userFullName?></b>.</li>
					<li>An <b class="html">input</b> element of <b class="html">type</b> <b class="html">text</b> named <b class="copyText html">favorite</b> with a label of <b class="copyText code">Favorite color:</b> and a <b class="html">value</b> equal to the value of <b class="copyText">$f['favorite']</b>.</li>
					<li>A <b class="html">textarea</b> element named <b class="copyText html">comment</b> with a label of <b class="copyText code">Comment:</b> and content set to <b class="copyText">$f['comment']</b>.</li>
					<li>An <b class="html">input</b> element of <b class="html">type</b> <b class="html">submit</b> named <b class="copyText html">task</b> with the  of <b class="html">value</b> of <b class="copyText code">Submit</b>.</li>
				</ol>
				<span class="note">For the $f['favorite'] and $f['comment'] variables you will need to ensure they are set before they are used.
					<br>If not, set them to an empty string or NULL.</span>
			</li>
			<li>Call the <b class="php">endPage</b> function</li>
			<li>Save the <b><?=$saveFilename?>_Form.php</b> file.</li><? /** / <b class="copyText code"></b> /**/?>
			<li>Verify that your <b><?=$saveFilename?>_Form.php</b> page works.
				<ol type="i">
					<li>Start Apache if it is not running.</li>
					<li>Open the  <b><?=$saveFilename?>_Form.php</b> page in a browser.</li>
					<li>You should see a page like:<br>
						<? BrowserBegin('Create a file','http://localhost/CST1146/'.$evaluationName.'/'.$saveFilename.'_Form.php',820); ?>
			<h1 class="left">Form test</h1>
						Favorite color: <input type="text">
						<br>Comment: <textarea></textarea>
						<br><input type="button" value="Submit">
						<? BrowserEnd(); ?>
						If this is not what you see then you have errors in your code.
					</li>
					<li><b class="info">Take a screenshot of the page</b> and save the image as <b class="copyText"><?=$saveFilename?>_Form.png</b> in your <b><?=$dataFolder?><?=$dirSep?><?=$courseNumber?><?=$dirSep?><?=$evaluationName?></b> directory.
						<br>Make sure that the address bar is visible in your browser before saving the image.
					</li>
				</ol>
			</li>
		</ol>
	</li>
	<!-- 5 -->
	<li>Code a PHP file to test form submission:
		<ol>
			<li>Create a PHP file named <b class="copyText"><?=$saveFilename?>_Perform.php</b> in the <b><?=$evaluationName?></b> directory and open it in an editor.
				<br><span class="note">This file will be included when  <b class=""><?=$saveFilename?>_Form.php</b> is submitted.</span>
			</li>
			<li>Begin a div with the code <b class="copyText html">&lt;div style="background-color:yellow;"&gt;</b>.</li>
			<li>Add an <span class="html">h2</span> heading with the content: <span class="html copyText">No parameters</span>.</li>
			<li>Display the $f array.</li>
			<li>Add an <span class="html">h2</span> heading with the content: <span class="html copyText">A list</span>.</li>
			<li>Set another variable equal to the return value of <b class="copyText php">formValue('myName,ooga')</b>.</li>
			<li>Display the variable.</li>
			<li>Add an <span class="html">h2</span> heading with the content: <span class="html copyText">No default</span>.</li>
			<li>Set another variable equal to the return value of <b class="copyText php">formValue('foo')</b>.</li>
			<li>Display the variable.</li>
			<li>Add an <span class="html">h2</span> heading with the content: <span class="html copyText">With default</span>.</li>
			<li>Set another variable equal to the return value of <b class="copyText php">formValue('bar',-1)</b>.</li>
			<li>Display the variable.</li>
			<li>End th div with the code <b class="copyText html">&lt;/div&gt;</b>.</li>
			<li>Save the <b><?=$saveFilename?>_Perform.php</b> file.</li><? /** / <b class="copyText code"></b> /**/?>
			<li>Verify that your <b><?=$saveFilename?>_Perform.php</b> page works.
				<ol type="i">
					<li>Start Apache if it is not running.</li>
					<li>Open the  <b><?=$saveFilename?>_Form.php</b> page in a browser.</li>
					<li>Enter some text for <b>Favorite color:</b> and <b>Comment:</b> then click <b>Submit</b>.</li>
					<li>You should see a page like:<br>
						<? BrowserBegin('Create a file','http://localhost/CST1146/'.$evaluationName.'/'.$saveFilename.'_Form.php',820); ?>
			<h1 class="left">Form test</h1>
						<div style="background-color:yellow;">
						<h2>No parameters</h2>
						<? $f = array('form' => 'form_test', 'myName' => $userFullName, 'favorite' => 'Green', 'comment' => "This is my\ntwo line comment.", 'task' => 'Submit'); ?>
						$f = <pre>
<?=var_dump($f)?></pre>
						<h2>A list</h2>
						<? $list = array('myName' => $userFullName, 'ooga' => NULL); ?>
						$list = <pre>
<?=var_dump($list)?></pre>
						<h2>No default</h2>
						<? $foo = NULL; ?>
						$foo = <pre>
<?=var_dump($foo)?></pre>
						<h2>With default</h2>
						<? $bar = -1; ?>
						$bar = <pre>
<?=var_dump($bar)?></pre>
						</div>
						Favorite color: <input type="text" value="Green">
						<br>Comment: <textarea>This is my
two line comment.</textarea>
						<br><input type="button" value="Submit">
						<? BrowserEnd(); ?>
						If this is not what you see then you have errors in your code.
					</li>
					<li><b class="info">Take a screenshot of the page</b> and save the image as <b class="copyText"><?=$saveFilename?>_Perform.png</b> in your <b><?=$dataFolder?><?=$dirSep?><?=$courseNumber?><?=$dirSep?><?=$evaluationName?></b> directory.
						<br>Make sure that the address bar is visible in your browser before saving the image.
					</li>
				</ol>
			</li>
		</ol>
		<span class="note">Add text to describe what is being displayed and on separate lines. Display all values using the php var_dump() function and html pre tag.</span>
	</li>
	<!-- 6 -->
	<!-- 7 -->
	<!-- 8 -->
	<!-- 9 -->
	<!-- 10 -->
	<li>Turn in your assignment:
		<ol>
			<li>Ensure the following files are in your <b><?=$evaluationName?></b> folder:<?
$fileList = array(
	'application.php',
	$saveFilename.'_Form.php',
	$saveFilename.'_Form.png',
	$saveFilename.'_Perform.php',
	$saveFilename.'_Perform.png',
);
	natcasesort($fileList);
						foreach ($fileList as $fileName) {
?>
				<br><?=$fileName?>
<?
						}
?>
			</li>
			<li>Zip up your <b><?=$evaluationName?></b> folder into a file named <b class="copyText"><?=$uploadFilename?></b>.</li>
			<li>Browse and select your <b><?=$uploadFilename?></b> file: <input type="file" name="fileUpload" id="inpFileUpload"<?=$disabled?>><div id="divFileploadError"></div></li>
			<li>Then <input type="submit" name="f_subtask" id="inpSubmit" value="Submit"<?=$disabled?>> for grading.</li>
		</ol>
	</li>
</ol><? if ( $disabled ) { ?><span class="error bold">Notice: Do not perform this assignment unless this notice has been removed.</span><? } ?>
</fieldset>
<?
require('../LabNotes.phpinc');
require('Gradebook/EvaluationSubmission_END.phpinc'); // Replaced.
?>

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