; The blacklist file is a text file that holds the names of files; that should not be accelerated. The file format is to add each filename; to a new line. The filename may be a full path or just a file prefix; (i.e., /var/www/x blacklists all the files and directories in /var/www; that start with 'x'). Line starting with a ; are ignored (comments).; Files are usually triggered by one of the following three reasons:; 1) Directories that contain auto generated code, like Smarty or ZFW cache.; 2) Code that does not work well when accelerated, due to some delayed; compile time evaluation.; 3) Code that triggers an OPcache bug.