Coldfusion function to substitute bad words entered into a form field for either asterisks or a string of of characters.

filter.cfc

<cfscript>
	component output=false {
		 public filters function init(dsn)
		 description="Initialize component as an object and store as an application variable. This will 
		 	make the just a single hit to the database and store the word list in memory to be used anytime."{ 
			variables.datasource = arguments.dsn;     
			var q = new query();
			var badWordQuery = 0;             
			q.setDatasource(variables.datasource);             
			q.setName(badWordQuery);             
			var qResult = q.execute(sql="
				SELECT 
					* 
				FROM
					badwords 
				ORDER BY CHAR_LENGTH(strBadWord) DESC 
			");             
			badWordQuery = qResult.getResult();
			variables.badWordList = valuelist(badWordQuery.strBadWord);
			variables.goodWordList = valuelist(badWordQuery.strReplaceString);
			return this;
		}
		 
		 public struct function filterWords(required string wordString,boolean scramble){
		 	var i = 0;
		 	var newString = arguments.wordString;
		 	var wordList = "";
		 	var returnStruct = {};
		 	var badWord = "";
		 	var replaceWord = "";
		 	
		 	for(i=1;i LTE ListLen(variables.badWordList);i++){
		 		badWord = trim(listgetat(variables.badWordList,i,","));
		 		
		 		if(arguments.scramble EQ 0){
		 			replaceWord = repeatstring("*", Len(trim(listgetat(variables.goodWordList,i,","))));
		 		}
		 		else{
		 			replaceWord = trim(listgetat(variables.goodWordList,i,","));
		 		}
		 		
		 		if(findnocase(badWord,newString)){
		 			wordList = listappend(wordList,badWord,",");
		 		}
		 		newString = replacenocase(newString,badWord,replaceWord,"ALL");
		 		
		 		
		 	}
		 	
		 	returnStruct['oldString'] = arguments.wordString;
		 	returnStruct['newString'] = newString;
		 	returnStruct['wordsRemoved'] = ListChangeDelims(wordList, ", ");
		 	return returnStruct;
		 }
		 
	}
</cfscript>