Category: Languages

The programming directory

CDATA, With, Match and Regular Expression

CDATA

Sometimes when you get errors within your HTML validation can sometimes just get bogged down with javascript code that has not been “told” to be ignored by the parser, for example the javascript code

if (a < b)

is fine within that context, but within HTML the < could be a start of a tag and thus would fall over with some old parsers and also the validator, so best to wrap the javascript code within the CDATA 

<script type="text/javascript">
<![CDATA[
   if (a < b) 
...
]]>
</script>

WITH

The with syntax will allow you to work on a object of a HTML form elements within having to constantly referencing the object fully, for example if you had a HTML as

<form name="theform">
<input id="theinput"/> 
<input id="secondinput"/>
</form>

and so within the javascript you could do something like this without using the with statement,

var theinput = document.form.theform.theinput;

well if you wanted to you could use the “with” syntax and thus if you wanted to access all of the elements within that HTML object then

with (document.form.theform)
{
    var first = theinput;
    var second = secondinput;
}

just allot more nicer to use the objects :).

Match / Regular expression

Since a string within the javascript is capable of having regular expression actions applied to it, you can use the inbuilt method that is associated with the string class as such, which allows you to do regular expression, but for some reason you do not need to put in the ” ” around the regular expression.

var username = document.getElementById("username");
if (
    username.match(/.+@.+\.com$)
   ) {
....

will match with a regular expression so that the username has to end with .com for it to be valid!!.. not really a good test, but there you go!.

XML XSLT XPath DOCDocument

This is one of the ways that I create dynamic web pages on the fly with using XML/XSLT with a PHP back-end to update the XML on the fly with data obtained (either from MySQL etc, but in this example it will be hard coded).

To start with I am using the PHP DOMDocument object, which is a very good XML reader and updater that uses the XPath query to obtain nodes(lists) from within the XML document itself. So to start with I first load up the XML file that has the basic outputs defined, which means that if you did not want to insert any data on the fly, you could use this basic one.

<?php 
    $xmlDoc = new DOMDocument();
    $xmlDoc->load("ass1baseoutput.xml");

and here is the XML file, what it basically is is just a symbols that I have created on the fly to mean something to me, like “title”,”form” so that I know what I kinder should be doing with the data located within them, so as you can probably tell I am about to generate an form filled with data.

<root>
	<title>XML/XSLT test</title>
	<form>
		<table>
			<row>
				<td>value1</td>
				<td>value2</td>
			</row>
			<row>
				<td>value3</td>
				<td>value4</td>
			</row>
		</table>
	</form>
</root>

The next this to do, is now that we have read in the XML file, we can use the DOCDocument to either createElement, which we can appendChild to that element of any data that we want to insert on the file, I am using a XPath to find the place where I want to insert the new data, in this case within the root/form/table element of the XML document. Since within the above document we have a row tag which is followed by a td tag, I have to create the same to insert, which is why I am creating a element first of a “row” and then appending a child (the 2 td elements) to that node, which at the end I insert the created row into the document via the xpath result.

// now that you have a XML document loaded, if you wanted to add more to areas, then you are 
// able to, thus changing the output on the fly as such.
 
	$xpath = new DOMXpath($xmlDoc);
	$nodelist = $xpath->query('/root/form/table');
	$row = $xmlDoc->createElement("row","");
	$row->appendChild($xmlDoc->createElement("td","Created on the fly"));
	$row->appendChild($xmlDoc->createElement("td","Right hand side"));
	$nodelist->item(0)->appendChild($row);
 
    $xslDoc = new DOMDocument();
    $xslDoc->load("sample.xsl");

Here is my XSLT file, how it kinder works is within the manor of matching elements from the XML document into the stylesheet (XSLT) so for example means to match from the base node (in this case the node called ROOT), then create some textural output (which is html code) and then pull back from data from the /root/title element from within the XML document with using the , to apply other templates that may match other parts from within the XML document, you use the adaptly named apply-templates 🙂 as 

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 <xsl:output method="html" encoding="iso-8859-1" indent="no"/>
<xsl:template match="/">
  <html>
  <title><xsl:value-of select="/root/title"/></title>
  <body>
	<xsl:apply-templates select="/root/form"/>
</body>
</html>
</xsl:template>
 
<xsl:template match="/root/form">
	<form action="" method="">
		<xsl:apply-templates select="/root/form/table"/>
		<input type="submit" value="submit"/>
	</form>
</xsl:template>
 
<xsl:template match="/root/form/table">
	<table>
		<xsl:for-each select="row">
		<tr>
				<xsl:for-each select="td">
					<td><xsl:value-of select="."/></td>
				</xsl:for-each>
		</tr>
		</xsl:for-each>
	</table>
</xsl:template>
 
</xsl:stylesheet>

and now all we need to do is to process the XML/XSLT to produce the output, with using the XSLTProcessor class

    $proc = new XSLTProcessor();
 
    $proc->importStylesheet($xslDoc);
    echo $proc->transformToXML($xmlDoc);
?>

The output would be, which has the inserted data “Created on the fly”, it may seem like a allot of hassle to get the output like below, but if you was using a far bigger XML file and XSLT with also creating allot of different pages with the same data, but just inserting different parts into the correct XML area, you can start to see that it will save allot of time and also be a nicely validated document.

<html><title>XML/XSLT test</title><body><form action="" method=""><table>
<tr><td>value1</td><td>value2</td></tr>
<tr><td>value3</td><td>value4</td></tr>
<tr><td>Created on the fly</td><td>Right hand side</td></tr>
</table><input type="submit" value="submit"></form></body></html>

Unique fileds Foreign keys duplicate key and Joins

I have been asked about some SQL questions, so I thought that I would post on here encase it helps others as well. The questions was based around, what is the unique key compared to a primary key, foreign keys (and how to link) and also the joins within a relationship database(outer, inner, left, right).

Unique key

An unique key is kinder similar to a primary key, where the primary key is the main index into the table itself (kinder like a index at the back of the book, where is item 5, arrh there in the book) well the unique key basically means that this column within the table cannot have a similar value within this column compared to any other values stored in other rows in the table. So for example,

Index UniqueKey
1 genux
2 bob

now if I tried to insert a name into the uniquekey field name of “genux” it would complain because there is already a field name of that.

Foreign key

A foreign key is a value that is linked to another table that if that other table ( which normally is the main table of lets say customers) deletes a row from it, then you can setup in the second table (where the foreign key is) to also delete data from its table where they are linked with the foreign key (this can also happen on updates as well instead of deleting data).

So as taken from this page on the mysql website.

CREATE TABLE parent (id INT NOT NULL,
                     PRIMARY KEY (id)
) ENGINE=INNODB;
CREATE TABLE child (id INT, parent_id INT,
                    INDEX par_ind (parent_id),
                    FOREIGN KEY (parent_id) REFERENCES parent(id)
                      ON DELETE CASCADE
) ENGINE=INNODB;

The foreign key is the parent_id field within the child table where it links to the parent tables id field and with the “ON DELETE CASCADE” it will delete any rows within the childs table if the parent table deletes its linking row.

Duplicate keys

Duplicate keys are nice, when you want to insert some data into a table and the index key is already present then you can update the value within the already present row in the table and thus get around the testing for any duplicate keys, you can also use the REPLACE syntax as well (but this will not allow you to increment the present value within the field, but update it to a new value).

Joins, left,right, inner, outer

Joins are basically in mathematical terms linking sets of data together, so a inner join

SELECT * FROM table1 INNER JOIN table2 ON table1.linkId = table2.Id

This will bring back only the data from both tables that have the linking column values from table1.linkId and table2.Id, in contrast to outer join

SELECT * FROM table1 OUTER JOIN table2 ON table1.linkId = table2.Id

where all of the values from within the two tables are outputted in the results but values of NULL are inserted into the unmatched result fields.

There is also, left and right join where it is similar to the outer join as in

SELECT * FROM table1 LEFT JOIN table2 ON table1.linkId = table2.Id

But only all of the values from the left table are still present in the results output and NULLs inserted into the fields where there is no link with the right had side table, of course the values from the right table are inserted where there is a link with the left table, and the right join is similar to the left join apart from all rows are in the results from the right table instead of the left. As a side note, the left table is the table on the left hand side of the join syntax so table1 in this instance.

preg_match – regular expression

Here is a good link for a cheat sheet for regular expressions that if you forget some of the syntax.

Here are some quick notes about regular expression in PHP that allow you to pull out information from a string of text.

$stringofvalues = "hi there from me - and now after that lets!!";
preg_match("/^.* - (.*)!!/", $stringofvalues, $matches);
print_r($matches);

and the output would be

Array
(
    [0] => hi there from me - and now after that lets!!
    [1] => and now after that lets
)

where the first array [0] is always the string that was passed in, and any matches that you picked are in the following index’s in the array (because the first match [0] in the array is the real string because it has matched that already 🙂 ) and then the second matches that you want to check for are within the regular expression ( .. ) brackets, so in my regular expression

/^.* - (.*)!!/

this means start at the beginning of the string ‘^’ and then any character ‘.’ 0 or more times ‘*’ find un-till you find a string as ” – ” (which is within the string to be searched) and then now copy any character 0 or more times ‘.*’ but this time place it into a matched index within the array by using the () around that regular expression search.

So if you wanted to pull back 2 matches from that string, then you could do something like

preg_match("/^(.*) - (.*)!!/", $stringofvalues, $matches);
print_r($matches);

Which the output would be

Array
(
    [0] => hi there from me - and now after that lets!!
    [1] => hi there from me
    [2] => and now after that lets
)

where the first part of the string (before the ” – “) is within the 1st index of the matches array and then the second search match is within the 2nd index of the matches array.

equals =,==,===

Since PHP does have type safe aspects to the language, for example within in c++ if you declared a variable to be of type int(eger) and other to be string and then to see if they was the same value, the compiler would complain because they are of different types so you need to convert one or the other to the same type before doing the check. Well in PHP if you had the a variable with the same value as such.

$intvalue = (int)4;
$strint = "4";

and did a test to see if they was the same in value then

if ($intvalue == $strint)
	echo "they are the same!, but one is a string and the other is a integer!";

would work since php does converts them into the same types to then do a comparison, but if you wanted to make sure that they are of the same types then use the ===

if ($intvalue=== $strint)
   echo "this should not show!!!.. because there types are different!!";
else
   echo "they may have same 'value', but they are different types so not equal";

the 3 equals (===) means compare the values and also the types, which in turn the else part of the if condition would be printed because, yes they are the “same” value but of different types and thus they are not equal.

pass by reference

When you call a function normally within PHP the variable that you pass is a copy of, for example

function doesNotAlter($alterMe)
{
   $alterMe++;
}
$pleaseAlterMe = 4;
doesNotAlter($pleaseAlterMe);

that will alter the $alterMe variable by adding one to it, but it will only alter it in a local scope of that variable so the actual variable that was passed ($pleaseAlterMe) will not change its value.

But if you pass by reference, then you bring the passing variable into the local scope of that function and thus any alternations to it will act on the variable that has been passed, the only thing that you need to alter is to add a (&), which is very similar to c/c++ which passes the reference to the object (pointer to).

function doesNotAlter(&$alterMe)
{
   $alterMe++;
}
$pleaseAlterMe = 4;
doesNotAlter($pleaseAlterMe);

The & is added to the variable in the passing function parameter list and that is all that it takes to make that remote variable to the function doesNotAlter, to now become a local scoped variable that will alter, so I could change the function name to doesAlter ;).

function doesAlter(&$alterMe)
{
   $alterMe++;
}
$pleaseAlterMe = 4;
doesNotAlter($pleaseAlterMe);
echo $pleaseAlterMe;

So now output would be “5”, because the local variable to the execution of the program is $pleaseAlterMe is first set to 4 and then passed by reference to the doesAlter me function which will actually alter that variable (by adding one to it) and then when you output that variable it will be 5.

CS75 – Assignment 0 – Three Aces Menu

I am doing the Harvards building dynamic websites called CS-75 (also could be called E-75), because someone told me about it and I just thought might as well, it is all learning 🙂 even if allot of it you may already know.

Anyway, to setup the CS75 on my personal laptop ( I am running Ubuntu 10.4) I did a couple of alternations for me so that the local apache instance looks like I am doing it under the top level domain of CS75 :).. so for this assignment Three Aces menu I am calling the website http://threeaces.cs75 on my local host, so to setup that I altered the /etc/hosts file and added

127.0.0.1       threeaces.cs75

so that local IP will also have threeaces.cs75 🙂 and now need to alter apache to allow me to run that as a virtualhost on my laptop, I added the file within

sudo vim /etc/apache2/sites-available/cs75_threeaces

with adding in

<VirtualHost *:80>
       ServerAdmin emailaddress@here.com
       ServerName  threeaces.cs75
       DocumentRoot /var/www/cs75/ass0
       <Directory /var/www/cs75/ass0>
               Options Indexes FollowSymLinks MultiViews
               AllowOverride None
               Order allow,deny
               allow from all
       </Directory>
 
       ErrorLog /var/log/apache2/error.log
       LogLevel warn
       CustomLog /var/log/apache2/access.log combined
 
</VirtualHost>

Which points to the /var/www/cs75/ass0 as the base directory for this assignment :).

I have included the assignments 0 PDF for more information, but basically this assignment is about playing with simpleXML to load in a menu (that you have created from the menu list of the restaurant Three Aces) which is in XML format, you get to pick the format, but here is mine (it has the extras link within the menu->type extras attribute which link to the extras at the bottom of the menu format)

<?xml version="1.0" encoding="ISO-8859-1"?>
<menu>
	<type name="Pizzas" extras="Extra Cheese">
		<item name="Tomato &amp; Cheese">
			<price type="Small">5.50</price>
			<price type="Large">9.75</price>
		</item>
		<item name="Onions">
			<price type="Small">6.85</price>
			<price type="Large">10.85</price>
		</item>
	</type>
	<type name="Salads">
		<item name="Garden">
			<price type="Small">3.50</price>
			<price type="Large">4.50</price>
		</item>
		<item name="Greek">
			<price type="Small">4.50</price>
			<price type="Large">5.50</price>
		</item>
	</type>
	<type name="Grinders">
		<item name="Meatless">
			<price type="Small">4.50</price>
			<price type="Large">4.95</price>
		</item>
		<item name="Hamburger">
			<price type="Small">4.50</price>
			<price type="Large">4.95</price>
		</item>
	</type>
	<type name="Special Dinners">
		<item name="Chicken Wing Dinner">
			<price>7.25</price>
		</item>
		<item name="Gyro Plate">
			<price>7.25</price>
		</item>
	</type>
	<extras name="Extra Cheese">
		<price type="Small">1.25</price>
		<price type="Large">1.85</price>
	</extras>
</menu>

You can implement it anyway that you want to, but to not have two same names of the food for different sizes. So that is why I have a the item name with the price list(s) underneath. It is only part of the menu that I implemented above.

The next part is to only have part of the menu on the main home page, so I am just displaying the main types of food options, I have included the source file for all of the files in the zip file above.

<form name="types" method="get" action="types.php">
<?php
// display the user the different types of foods that are avaible to order
$xml = simplexml_load_file("menu.xml");
// list the different types on the menu
foreach ($xml->type as $types)
{
	echo "<input type=\"radio\" name=\"type\" value=\"" .$types->attributes()->name .  "\"/>".$types->attributes()->name . "<br/>" ;
}
?>
<input type="submit"/>
</form>

Once the user has selected the type of food that they want, you next to have display the items of food within that area, so I am passing in the $_GET string from the index page the type of food, so within the types.php I pick up the type and then display all of the food items within that area. I did do some javascript that will make sure that there is a valid integer value within the, also at the start of the code I am pulling any extra values from the menu to populate the extras option.

<form name="types" method="get" action="checkout.php" onsubmit="return checkout()">
<?php
// display the different items within that type area of foods, with also there different prices and sizes
// normal = normal size for the default size
$xml = simplexml_load_file("menu.xml");
$type = $_GET["type"];
echo $type. "<table border=1>";
echo "<input type=\"hidden\" value=\"".str_replace(" ", "@",$type)."\" name=\"type\"/>";
$result = $xml->xpath("//type[@name='$type']");
if (sizeof($result[0]) == 0)
	echo "<br/><br/>Please go back to home, because cannot find that type<br/><br/>";
else
{
	$extras = $result[0]->attributes()->extras;
	if (strlen($extras) > 0)
	{
		$resultExtras = $xml->xpath("//extras[@name='$extras']");
		if (sizeof($resultExtras[0]) > 0)
		{
			$extraName = $resultExtras[0]->attributes()->name;
			for ($i=0; $i < sizeof($resultExtras[0]); $i++)
			{
				$thePrice =  $resultExtras[0]->price[$i];
				$theType = ($resultExtras[0]->price[$i]->attributes()->type ? $resultExtras[0]->price[$i]->attributes()->type : "Normal");
				$theExtras[$i] = array((string)$thePrice, (string)$theType);
			}
		}
	}
	foreach ($result[0] as $items)
	{
		echo "<tr><td>".$items->attributes()->name."</td><td>Price</td><td>Quantity</td>";
		if (strlen($extras)) echo "<td>$extras</td>";
		echo "</tr>";
		for ($i=0; $i < sizeof($items->children()); $i++)
		{
			echo "<tr><td>". $items->price[$i]->attributes()->type . 
				"</td><td>" . $items->price[$i].
				"</td><td><input type=\"text\" size=\"1\" value=\"\" name=\"".str_replace(" ", "@",$items->attributes()->name)."_".$i."\"/></td>";
			if (strlen($extras))
			{
				foreach ($theExtras as $typeCheck)
				{
					if ($typeCheck[1] == $items->price[$i]->attributes()->type)
					{
						echo "<td><input type=\"checkbox\" name=\"".str_replace(" ","_",$extras)."_".$i."\" value=\"".str_replace(" ", "@",$items->attributes()->name)."_".$i."\"/></td>";
						break;
					}
				}
			}
			echo "</tr>";
		}
	}
}?>
</table>
<input type="submit" name="submit"/>
</form>

Because there is a basket of items that the customer will like to buy, I am also storing the basket details within the $_SESSION within a multi array, the array looks like something like

Array
(
    [Pizzas] => Array
        (
            [Tomato  Cheese] => Array
                (
                    [Small] => Array
                        (
                            [price] => 5.5
                            [quantity] => 6
                        )
                )
        )
)

So in the next page, checkout.php I need to update the basket details and also then display what the customer has already picked (with giving the options to update the quantity of goods and also to remove them if they did not want it), the first part loads the new item(s) into the basket and the second part of the code below will display the basket to the user, and call the update.php file if any quantities/remove of items need to be done.

<form name="types" method="get" action="update.php">
<table>
<?php
// display the updated details of the order with the new order addon's 
// and also any previous details of the order, if you want to place the order
// click the order now link below.
$xml = simplexml_load_file("menu.xml");
// load basket from the session
$basket = $_SESSION["basket"];
$type = $_GET["type"];
$type = str_replace("@", " ", $type);
 
$result = $xml->xpath("//type[@name='$type']");
if (sizeof($result[0]) == 0)
{
	if (strlen($type) > 0)
		echo "<br/><br/>Please go back to home, because cannot find that type<br/><br/>";
}
else
{
	$extras = $result[0]->attributes()->extras;
	if (strlen($extras) > 0)
	{
		$resultExtras = $xml->xpath("//extras[@name='$extras']");
		if (sizeof($resultExtras[0]) > 0)
		{
			$extraName = $resultExtras[0]->attributes()->name;
			for ($i=0; $i < sizeof($resultExtras[0]); $i++)
			{
				$newname = str_replace(" ", "_" , $extras) . "_" . $i;
				$$newname = $_GET[$newname];
				if (strlen($$newname) > 0)
				{
					$thePrice =  $resultExtras[0]->price[$i];
					$theType = ($resultExtras[0]->price[$i]->attributes()->type ? $resultExtras[0]->price[$i]->attributes()->type : "Normal");
					$theExtras[$i] = array($$newname, (string)$thePrice, (string)$theType);
				}
			}
		}
	}
 
	foreach ($result[0] as $items)
	{
		for ($i=0; $i < sizeof($items->children()); $i++)
		{
			$newname = $items->attributes()->name."_".$i;
			$newname = str_replace(" ", "@", $newname);
			$$newname = $_GET[$newname];
			if ($$newname > 0)
			{
				$priceType = $items->price[$i]->attributes()->type;
				if (strlen($priceType) <=1)
					$priceType = "Normal";
				$extraPrice = 0;
				foreach ($theExtras as $extraAdd)
				{
					if ($extraAdd[0] == $newname)
						$extraPrice = $extraAdd[1];
				}
				$basket[(string)$type][(string)$items->attributes()->name][(string)$priceType . ($extraPrice > 0 ? (string)" (".$extras.")" : "")] = 
							array("price" =>(float) ($items->price[$i]) + (float)$extraPrice, 
									"quantity" => (int)($$newname 
										+ $basket[(string)$type][(string)$items->attributes()->name][(string)$priceType]["quantity"]) );
				// going with the theory of adding to the previous quantity
				echo "Have added " . $type . " (". $items->attributes()->name . " " . $priceType . ")<br/>";
			}
		}
	}
	$_SESSION["basket"] = $basket;
}
// lets print out the basket in a form of the user to confirm and also remove / alter the quantity
$totalPrice = 0;
echo "<table border=1><tr><td width=50>Type</td><td width=50>Item</td><td width=50>Size</td><td>Price</td><td>Quantity</td><td>Total Price</td><td>Remove</td></tr>";
foreach ($basket as $type => $typevalue)
{
	echo "<tr><td colspan=\"6\">$type</td>";
	foreach ($typevalue as $item => $itemvalue)
	{
			echo "<tr><td></td><td colspan=\"5\">$item</td></tr>";
			foreach ($itemvalue as $size => $sizevalue)
			{
				$namevalue = $type."_".$item."_".$size;
				$namevalue = str_replace(" ","@",$namevalue);
				echo "<tr><td></td><td></td><td>$size</td>";
				echo "<td>&pound;".number_format($sizevalue["price"],2) . "</td><td><input size=5 value=" . $sizevalue["quantity"]  . " name=\"".$namevalue."_quantity\"/></td><td>&pound;".number_format($sizevalue["price"] * $sizevalue["quantity"],2) ."</td><td><input type=\"checkbox\" name=\"".$namevalue."_remove\"/></td></tr>";
				$totalPrice +=$sizevalue["price"] * $sizevalue["quantity"];
			}
	}
	echo "</tr>";
}
echo "</table>";
 
echo "The total price is &pound;".number_format($totalPrice,2)."<br/>";
?>
</table>
<input type="submit"/>
</form>

here is the update.php, this will update the basket from the requested action from the above php file.

<?php
// this will update the session basket from the checkout.php page
session_start();
$xml = simplexml_load_file("menu.xml");
// load basket from the session
$basket = $_SESSION["basket"];
foreach ($_GET as $key => $value)
{
	$key = str_replace("@", " ", $key);
	list($type, $item, $size,$command) =  split("_", $key);
	if ($command== "quantity" && $value > 0)
	{
		$basket[$type][$item][$size]["quantity"] = $value;
	}
	elseif ($command =="remove")
	{
		unset($basket[$type][$item][$size]);
		// clean out the type -> item if none more left
		if (sizeof($basket[$type][$item])==0)
			unset($basket[$type][$item]);
		// clean out the type if none left
		if (sizeof($basket[$type])==0)
			unset($basket[$type]);
	}
}
$_SESSION["basket"] = $basket;
// redirect back to checkout.php
header('Location: checkout.php');
?>

and redirects back to checkout.php.

The last page displays the order in total and also says thanks very much for the order :).. and deletes the basket details :).

<table>
<?php
// display the order details and also thanks for placing the order
$basket = $_SESSION["basket"];
// lets print out the basket in a form of the user to confirm and also remove / alter the quantity
$totalPrice = 0;
echo "<table border=1><tr><td width=50>Type</td><td width=50>Item</td><td width=50>Size</td><td>Price</td><td>Quantity</td><td>Total Price</td></tr>";
foreach ($basket as $type => $typevalue)
{
	echo "<tr><td colspan=\"6\">$type</td>";
	foreach ($typevalue as $item => $itemvalue)
	{
			echo "<tr><td></td><td colspan=\"5\">$item</td></tr>";
			foreach ($itemvalue as $size => $sizevalue)
			{
				echo "<tr><td></td><td></td><td>$size</td>";
				echo "<td>&pound;".number_format($sizevalue["price"],2) . "</td><td>" . $sizevalue["quantity"]  . "</td><td>&pound;".number_format($sizevalue["price"] * $sizevalue["quantity"],2) ."</td></tr>";
				$totalPrice +=$sizevalue["price"] * $sizevalue["quantity"];
			}
	}
	echo "</tr>";
}
echo "</table>";
 
echo "The total price is &pound;".number_format($totalPrice,2)."<br/>";
session_destroy();
?>
</table>

The file above does include all of the php files from the above comments and the PDF of the assignment. You can also view the assignment live on my CS – 75 assignment 0 test area.