361037 FInd and Replace Software

im looking for a small software which will find and replace text as exact match in single or multiple files from a small text database. i need an area, where i can update this database where i can put complete sentenaces(for replace and substitute) as rows and once i select the files, it will remove it and replace it with the substitute. the files it should be able to read are txt,css,php,asp,aspx,js