Migrating ColdFusion 5 Applications
Migrating ColdFusion 5 Applications

CFML functions and variables

The following table describes other CFML functions and variables in ColdFusion MX that differ from ColdFusion Server5:

Function	Status	Issue	For more information
ArrayAvg(), ArrayMin(), ArrayMax(), ArraySum()	Changed	Returns "0" when used with an empty array. ColdFusion5 returns infinity (1.#INF).	See ArrayAvg(), ArrayMin(), ArrayMax(), and ArraySum() in CFML Reference.
AuthenticatedContext(), AuthenticatedUser(), IsAuthenticated(), IsAuthorized(), IsProtected()	Obsolete	ColdFusion MX is based on a completely different security model than ColdFusion5.	See the "Application Security" chapter in Developing ColdFusion MX Applications with CFML.
DateDiff()	Changed	In ColdFusion5, there is one less second in a minute when calculating a negative difference. For example, it returns 60 seconds between 03:44:23 and 03:45:23, but -59 seconds between 03:45:23 and 03:44:23. ColdFusion MX calculates negative differences correctly, so if your application contains code that adjusts the ColdFusion5 results, you might have to change it.	See DateDiff() in CFML Reference.
DeleteClientVariable()	Changed	Returns False when the variable does not exist. ColdFusion5 ignores the function call.	See DeleteClientVariable() in CFML Reference.
GetBaseTagList()	Changed	Returns prefixed custom tags found in the tag stack in the format x:tag, where x is the prefix that you specified.	See GetBaseTagList() in CFML Reference.
GetLocale()	Changed	When the locale has not been explicitly set using SetLocale(), GetLocale() returns the default locale of the client computer's operating system. In ColdFusion5, GetLocale() returns English(US) when the locale has not been explicitly set.	See GetLocale() and SetLocale() in CFML Reference.
GetTempDirectory()	Changed	(Windows) Returns the temporary directory for the embedded Java application server, instead of the temporary directory for the Windows operating system, as in ColdFusion5.	See GetTempDirectory() in CFML Reference.
IsArray()	Changed	Returns True with a QueryColumn argument. You can change the value of an array element, but you cannot add or remove an element.	See "QueryColumn object", and IsArray() in CFML Reference.
IsWDDX()	Changed	Returns No for arrays and other complex values. ColdFusion5 returns an error. (Both versions accept a basic value, such as a string, number, logical value, or date and time value. )	See IsWDDX() in CFML Reference.
Len()	Changed	When calculating a length, a string-processing function processes an ASCII 0 (NUL) character and continues to process subsequent characters of the string, if any. In ColdFusion5, these functions did not process any subsequent characters of the string after processing the ASCII 0 (NUL) character.	See Len() in CFML Reference.
ListSetAt()	Changed	No longer changes the first delimiter in the list to the first delimiter specified in the function.	See ListSetAt() in CFML Reference.
ListSort()	Changed	In a descending sort with textnocase, ListSort() returns elements in a different order than in ColdFusion5.	See "Using ListSort() in ColdFusion MX".
LSCurrencyFormat()	Changed	Returns a negative number when passed a negative number.	See "Localization".
		With the local argument, returns the currency in the locale's standard format, such as for pounds in the English(UK) locale.
		With the international argument, returns the currency with its international currency code, such as AUD for the Australian dollar.
LSIsDate()	Changed	Supports full date and full datetime as parameters, which include the name of the day.
LSParseDateTime()	Changed	For English (US) locales, the following date mask format is obsolete in ColdFusion MX: 23:15:16 4 Sept. 1998. Use a Java standard date format instead.
REFind REReplace() REFindNoCase() REReplaceNoCase()	Changed	Excludes questionable punctuation, such as +, $, and =, in the [[:punct:]] class of regular expression functions.	See REFind(), REReplace(), REFindNoCase(), and REReplaceNoCase() in CFML Reference.
		Recognizes accented letters in the appropriate character classes, such as :upper:, :lower:, :alpha:, and so on.
		Does not allow the backslash character (\) in a regular expression, even if it is inside a character class []. You must escape it by prefixing an additional backslash (\\). (ColdFusion5 does not require you to escape a backslash in this case.)
REReplace(), REReplaceNoCase()	Changed	In replacement strings, the following character pairs now represent case conversion codes: \E, \l, \L, \u, and \U. If your ColdFusion5 application has a replacement string with one of these character pairs, escape it by prefixing it with a backslash (for example, \\u). To include special characters for backrefs (\1), prefix them with an additional blackslash (for example, \\1). To include a real backref, prefix an additional backslash (for example, \\\1). For case conversion codes, additional blackslash prefixes alternate between escaping the code and not. For backrefs, they always escape.	See REReplace() and REReplaceNoCase() in CFML Reference.
StructKeyList	Changed	Returns struct keys in the order they are created, not in alphabetical order like in ColdFusion5. If you need sorted struct values or keys, you can use the StructSort and StructKeySort functions.	See StructKeyList() in CFML Reference.

Note:   The date pivot point for calculating the century in a two-digit year has changed from ColdFusion5, affecting the results from date functions. For more information, see "Date pivot point for two-digit years".

The ColdFusion section of the Macromedia website contains the most current compatibility information. For more information, go to http://www.macromedia.com/coldfusion.

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