This is a simple but effective way of getting rid of HTML tags and make the HTML string into plain text to output:

#REReplace(htmlStr,”<[^>]*>”,”",”All”)#

Example HTML: <h1>Title</h1><p>My content<p>
Example Output after: Title My content

One of the main things all developers come to in applications is pagination and the best way we found to do this is by Raymond Camden which covers how to create next and previous buttons for your content using the URL variable.

As we have extended what Raymond Camden has done we will go through all the code again to make sure you get the full picture.

First part is to get our data, which most of the time will be a database or as the second data example shows a queryNew which is a way of creating data in a query format without the need of a database query.

<cfquery name=”data” datasource=”data_dsn”>

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SELECT *

FROM data

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</cfquery>

OR

<cfset data = queryNew(“id,name,age,active”,”integer,varchar,integer,bit”)>

<cfloop index=”x” from=”1″ to=”22″>
<cfset queryAddRow(data)>

<cfset querySetCell(data,”id”,x)>
<cfset querySetCell(data,”name”,”User #x#”)>
<cfset querySetCell(data,”age”,randRange(20,90))>

<cfset querySetCell(data,”active”,false)>

</cfloop>

Next we want to set the number of records per page we would like to show, for this example code we are using 10:

<cfset perpage = 10>

Now we create the code for the URL variables which counts the records in the data we have got from our database / query. We also set the default of the variable URL.start to 1 as we want to start from the first record and not 0.

<cfparam name=”url.start” default=”1″>

<cfif not isNumeric(url.start) or url.start lt 1 or url.start gt data.recordCount or round(url.start) neq url.start>
<cfset url.start = 1>
</cfif>

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The output of the data, you will notice on our <cfoutput> tag we have startrow & maxrows which sets what records are displayed.

<cfoutput query=”data” startrow=”#url.start#” maxrows=”#perpage#”>
#currentrow#) #name#<br />
</cfoutput>

And now this is when the code that Raymond Camden created changes a little to add in a new feature, page numbering. We first have a previous link which has an if statement around it to see if its a link or not and enable the <a> tag or have no link on it. This can be done different ways but to keep with Raymond Camden’s code we will leave it as it is. Now the new part you can see within the commented area (<!— Start Page Number —> CODE <!— End Page Number —>) we set 2 variables one for a page count as we need to have a number of pages that will be listed. The next one is page link, this is to fit in with the rest of the code and add the number that will need to be added within the link to view the numbered page. Next is a loop to go through the number of pages with the link and a small bit of VERY simple maths to add up the next page through the loop.

<p align=”center”>

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[

<cfif url.start gt 1>

<cfset link = cgi.script_name & "?start=" & (url.start - perpage)>

<cfoutput><a href="#link#">Previous Page</a></cfoutput>

<cfelse>

Previous Page

</cfif>

/

<!--- Start Page Number --->

<cfset pageCount = 1>
<cfset pageLink = 1>

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<cfset totalPages = Ceiling(rs_getReports.recordCount / perpage)>

<cfloop index="c" from="1" to="#totalPages#">

<cfoutput>

<a href="?start=#pageLink#">#pageCount#</a>

</cfoutput>

<cfset pageCount = pageCount + 1>

<cfset pageLink = pageLink + perpage>

</cfloop>

<!--- End Page Number --->

/

<cfif (url.start + perpage - 1) lt rs_getReports.recordCount>

<cfset link = cgi.script_name & "?start=" & (url.start + perpage)>

<cfoutput><a href="#link#">Next Page</a></cfoutput>

<cfelse>

Next Page

</cfif>

]

</p>

Thats it, you will now have something that looks like this:

Base code taken from Raymond Camden’s coldfusionjedi.com :

http://www.coldfusionjedi.com/index.cfm/2006/4/24/ColdFusion-and-Pagination

After 3 months of development first staging of the Polar CMS script has been released to our testers / designers to start playing with.

Process of our testing

• Running the install program to setup the databases and user accounts
• Use the basic functions of the CMS:
  - Add pages

  - Add page elements to change

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  - Use the WYSIWYG editor
  - Apply code to front end site to test speeds

• Consult with development team to see how things can be improved

A new part of ColdFusion our development team has been looking into more is the custom tags (cf_). Soon to be used with the Polar CMS (Visit official site), custom tags allow you to have scripts and coding within a tag that can be called from a cfm page as shown below:

<!— CFM Page (cfcustomtag_caller.cfm)—>

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<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>
<html xmlns=”http://www.w3.org/1999/xhtml”>
<head>
<meta http-equiv=”Content-Type” content=”text/html; charset=UTF-8″ />
<title>Call Tag</title>
</head>

<body>
<cf_cfcustomtag customVar=”test”>
<p>SOME HTML</p>

<cf_cfcustomtag form=”testFormCode”>
</body>
</html>

As you can see we are using a new tag <cf_cfcustomtag> with custom variables (customVar=”test”). These variables can be picked up within our custom tag cfm file we are about to create.

<!— CFM Page (cfcustomtag.cfm)—>
<cfoutput>
<cfif isDefined(“ATTRIBUTES.customVar”)>
<h1>#Now()#</h1>
<p>#ATTRIBUTES.customVar#</p>

</cfif>
<cfif isDefined(“ATTRIBUTES.form”)>

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<p>#ATTRIBUTES.form#</p>
</cfif>
</cfoutput>

The above is a simple CFM file which has HTML and ColdFusion code. As you will notice we have named the file ‘cfcustomtag.cfm’ which is the same name as the tag: <cf_cfcustomtag> just without the cf_ at the start. Coldfusion will look for any files with the same naming tag.

You may ask why not use a <cfinclude> tag, but with cfincludes they can be slower and you are not able to reuse the cfinclude as easy as a cf_ custom tag. With custom tags you can lower the amount of code you need by using the extra variables (ATTRIBUTES).

Hope you enjoy using custom cf_ tags. Feel free to comment and add your code to show better ways of using cf_ tags. You may also want to research <cfmodule> tags.

The Coldfusion dateformat works in the same sort of fashion as the ASP.NET and the PHP date time function. As our team mainly works in Coldfusion we can expand alot more on this function that ASP.NET / PHP.

The code: (Use this code within a <cfoutput></cfoutput> tag)

#DateFormat(Now(), "YYYY")#

About the code:

As you can see all we start with DateFormat which states will want to have a date format (You can use TimeFormat to work with times). Next we are getting the current date with the Now() and then we have the formatting of the date, as we only want the year we are using ‘YYYY’ (Displays: 2009) or you can use ‘YY’ (Displays: 09)

Enjoy!

Many of our clients have been asking about detecting if a user is using a blackberry or iPhone etc to view their website and redirect to a mobile version of their websites. Well we have put together a little bit of code to do this:

Code example:

<cfif findNoCase('blackberry', CGI.HTTP_USER_AGENT)>
<cflocation url="http://blackberry.yourdomain.com" addtoken="no">
<cfelseif findNoCase('iphone', CGI.HTTP_USER_AGENT)>
<cflocation url="http://iphone.yourdomain.com" addtoken="no">
<cfelseif CGI.HTTP_ACCEPT CONTAINS "text/vnd.wap.wml">
<cflocation url="http://wap.yourdomain.com" addtoken="no">
</cfif>

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Hope you enjoy this code snippet.

vBulletin use a different way of HASHING the password for users (vb_user table), we have been able to allow a Coldfusion page to retrieve the username and password to allow you to use the vBulletin database on your website for account.

With this you will get an idea on adding new records into the database from non-vbulletin pages.

First thing to do is access the Coldfusion administrator and add the vBulletin MySQL database as a datasource (DSN).

When you have done this to test that you can connect to the database add this to your CF page:

<cfquery name=”rs_users” datasource=”vb_forum”>
SELECT userid, username, password, email, salt
FROM vb_user
</cfquery>
<cfdump var=”#rs_users#”>

This will run a cfdump of the content of the table, there are many more columns that just “userid, username, password, email, salt” but these are the important ones for now.

Now for the code that will make your application work with vBulletin’s database:

<cfif IsDefined(‘FORM.username’) AND FORM.username NEQ ”>

<cfquery name=”rs_user” datasource=”vb_forum”>
SELECT username, password, salt

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FROM vb_user
WHERE username = ‘#FORM.username#’
</cfquery>

<cfset vbPassword = #lCase(HASH(lCase(HASH(FORM.password, “MD5″)) & #rs_user.salt#, “MD5″))#>

<cfquery name=”rs_finduser” datasource=”vb_forum”>
SELECT userid, username, password, email
FROM vb_user
WHERE username = ‘#FORM.username#’
AND password = ‘#vbPassword#’
</cfquery>

<cfdump var=”#rs_finduser#”>

</cfif>

<form name=”login” method=”post”>
Username: <input name=”username” /><br />
Password: <input name=”password” /><br />
<input name=”submit” type=”submit” />
</form>

From this you can now set your SESSIONS and start using data from the vBulletin database to integrate your website better.

Hope you find this useful.

When working with some of our clients on windows servers we have noticed Coldfusion has some problems when working with images for cfdocument. The Coldfusion shows a 60 second time out error.

We found out that it was due to the image location as Coldfusion appears to pull all the files onto is main application so full fold paths are required.

Normally using:

<img src=”/images/image.jpg”/>

Instead of using the HTTP you need to use the file system path:

<img src=”file:///C:\drivefolder\wwwroot\sitename\images\image.jpg“/>

This corrects the issues with Coldfusion 7+ (Problem still in CF 8).

We are going to look into using the ColdFusion components known as CFC’s and how easy they can make your web applications.

Some benefits of using CFCs

• Better security
• Reuseable code
• Faster applications

The tutorial
Our first step is to create a database & datasource, you can find all SQL & source files with the ZIP file attached to this thread (You may need to login to access).

users.cfc

<cfcomponent displayname="Users" hint="The main display name for the component">

	<cffunction name="getUsers" hint="Gets users function" access="public" returntype="query">

		<cfquery name="allUsers" datasource="yours_datasource">
			SELECT *
			FROM users
		</cfquery>

		<cfreturn allUsers>

	</cffunction>

</cfcomponent>

Our first bit of code is the main component as you can see we have ‘cfcomponent’ to start with the define the component. The next tag is the function which in this case is a query as we want to select everything from a database.

Next is the query, its just a normal query as you would do in ColdFusion. We then add a return so we can return the information from the database. Then we just close the tags.

index.cfm

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<title>Using CFCs</title>
</head>

<body>

<cfinvoke component="users" method="getUsers" returnvariable="listUsers"></cfinvoke>

<p>Get Users:</p>

<ul>
<cfoutput query="listUsers">
	<li>#id#</li>
</cfoutput>
</ul>

</body>
</html>

The main area of this code you are probable looking at is the ‘cfinvoke’ tag, this calls the component. You may be asking why cant I just use a .cfm file for the query and do an include, well you could but an cfinclude will not be compiled by coldfusion and will run a lot slower where a CFC will be faster.

After the cfinvoke we can just do a cfoutput with the query as shown above.

Well thats it for CFC’s, working with them is better practice and also better when working in a team so you can start to extend each others components.

As Sessions is a big deal I have decided to make parts to it. In part 1 we are going to see how to detect if a session is undefined and to create it.

First thing you need to know is that sessions uses structures, you can have multiply structures for your website for different things.

We are going to work up a simple login system using sessions. We are calling the structure loggedin. The first step is to see if the session has been created, so we will need some if statements for the session detect:

Next we want to create the session if its not defined, the code above is shown below but with cfset tags:

Now what we have asked coldfusion to do is create a new structure (StructNew) with ‘SESSION.loggedin’ as the structure name. After this we want to populate the session structure with a value within the ‘username’ session. We have just used test for now but we go onto bringing in database from a database to work with a login script.

I am going to be going into how to get the current date & time with coldfusion, dont worry it is very simple to do and does not require anything special like a datasource.

Date
First we are going to be working with getting the date onto your page.

Step 1
First within your Application.cfm/.cfc we want to add the following cfset to get the date. If you wish you can add this to the same page as the output of the date but it is always nice to have an application file.

Step 2
The following code mainly formats how the date gets displayed, the sample code below will output the date in the format of YYYY/MM/DD but you can easily turn this into: DD/MM/YYYY.

Time

Step 1
Just like the date we want to add the following code to detect what the current time is

Step 2
Again same as the date we want to format the time in to something we can display and read on screen. There is something that is very different to the date and that is using capitol letters, when you have for example ‘HH’ instead of ‘hh’ for the hour to are saying to the coldfusion to use a 24 hour system with the hours. Below we have set the time to display in a 24 hour clock with HH:MM:SS you can take out the ‘SS’ if you do not wish to display the seconds.

Thats it for time and dates