If you ever need help diagnosing problems with dynamically generated e-mail, check out the Mail tab in the ColdFusion Administrator. There is a checkbox there entitled "Log all email messages sent by ColdFusion" - and checking this box will force ColdFusion to log the complete contents of the...
Many characters cannot (or should not) be used within your HTML pages. These include & (which must be specified as &), and
tags require that an image file name be specified in the SRC attribute - all other attributes are optional. But best practices dictate that other attributes be specified too, including HEIGHT and WIDTH (so that the browser can allocate the exact screen space before the image is retrieved)....
Lots of things have an impact on the performance of your applications, and the best way to monitor system performance (both in real-time and ongoing logging) is via ColdFusion's integrated performance monitoring support. If you are running Windows NT and 2000 then the standard Performance Monitor...
The tag is used to spawn an application from within CFML code, optionally capturing any generated output. can be used in two ways - ColdFusion can wait until the spawned application has finished processing (synchronous), or it can spawn the application and then continue processing immediately not...
Everyone knows to check that URL and FORM variables exist before using them, but too many developers refer to these variables in their code without first checking their contents. Many even use these in SQL statements or other tags without first inspecting them. This is a dangerous practice and one...
What is the difference between and ? From a functional perspective nothing at all - IsDefined() returns YES or NO (or TRUE or FALSE) and if you don't specify what it is your are comparing against then ColdFusion treats it as if you are checking for TRUE. But from a performance perspective there is...
ColdFusion provides a Web based interface (in the ColdFusion Administrator) for creating and configuring ODBC data sources, but not all ODBC drivers are supported this way. ColdFusion can use any drivers, even those not supported directly via the Web interface. To use other drivers simply create...
ColdFusion Studio (and HomeSite) include extensive help documents that may be browsed and searched. In addition, you can add help content yourself (either your own or downloaded from the Web). All you need to do is drop the files (HTML files and supporting images if needed) into a subdirectory...
Many ColdFusion tags take server names as attributes - for example, (directly or via the ColdFusion Administrator), , , , and . Every time ColdFusion processes a server name you are forcing a DNS lookup to occur - and while DNS information is cached, eliminating DNS lookups can save precious time....