This is an overview of the recommended directives for your application. The most important directives have been collected here, for a quick review. The whole list of directive is available as a link to the manual, when applicable. When an extension is missing from the list below, either it as no specific configuration directive, or it is not used by the current code.
| Directive | Suggestion | Description |
|---|---|---|
| file | ||
| allow_url_fopen | Off | Unless you need to access remote files, it is better to be safe and forbid this feature |
| realpath_cache_size | 128k | Determines the size of the realpath cache to be used by PHP. The default value of "16k" is usually too low for modern application that open many files (autoload, fopen, filet_get_contents...). It is recommended to make this value up to 128 to 256k, and reduce it by testing with realpath_cache_get(). |
| realpath_cache_ttl | 3600 | Duration of time (in seconds) for which to cache realpath information for a given file or directory. If the application's code doesn't change too often, you may set this directive to 3600 (one hour) or even more. |
| Extra configurations | File System runtime configuration | |
| filter | ||
| filter.default | unsafe_raw | Set the default filter when using functions like filter_input(), filter_var() or their _array() version. Give this a strict level, like 'string' by default, and make every call to the previous functions configure the filters case by case. |
| Extra configurations | Filter runtime configuration | |
| ob | ||
| output_buffering | 4096 | You can enable output buffering for all files by setting this directive to 'On'. If you wish to limit the size of the buffer to a certain size - you can use a maximum number of bytes instead of 'On', as a value for this directive (e.g., output_buffering=4096). As of PHP 4.3.5, this directive is always Off in PHP-CLI. |
| output_handler | mb_output_handler or ob_iconv_handler(), ob_gzhandler() or zlib.output_compression; | Use the first suggested values to handle character encoding. Use the second values for on the fly compression; Use your own function if you have one. |
| implicit_flush | False | Changing this to TRUE tells PHP to tell the output layer to flush itself automatically after every output block : this has performances penalty. |
| standard | ||
| memory_limit | 120 | This sets the maximum amount of memory in bytes that a script is allowed to allocate. This helps prevent poorly written scripts for eating up all available memory on a server. It is recommended to set this as low as possible and avoid removing the limit. |
| max_execution_time | 90 | This sets the maximum amount of time, in seconds, that a script is allowed to run. The lower the value, the better for the server, but also, the better has the script to be written. Avoid really large values that are only useful for admin, and set them per directory. |
| expose_php | Off | Exposes to the world that PHP is installed on the server. For security reasons, it is better to keep this hidden. |
| display_errors | Off | This determines whether errors should be printed to the screen as part of the output or if they should be hidden from the user. |
| error_reporting | E_ALL | Set the error reporting level. Always set this high, so as to have the errors reported, and logged. |
| log_errors | On | Always log errors for future use |
| error_log | Name of a writable file, suitable for logging. | Name of the file where script errors should be logged. |
| Extra configurations | Standard runtime configuration | |
| Enable DL | ||
| enable_dl | Off | Whether or not to enable the dl() function. The dl() function does NOT work properly in multithreaded servers, such as IIS or Zeus, and is automatically disabled on them. |
| Disable features | ||
| disable_functions | exec, passthru, shell_exec, system, proc_open, proc_nice, proc_terminate, proc_get_status, proc_close, popen, pclose, curl_exec, curl_multi_exec, show_source, symlink, fsockopen, pfsockopen, socket_connect, socket_create_listen, socket_create_pair, socket_create, symlink, mail, apache_child_terminate, apache_get_modules, apache_get_version, apache_getenv, apache_note, apache_setenv, pcntl_alarm, pcntl_errno, pcntl_exec, pcntl_fork, pcntl_get_last_error, pcntl_getpriority, pcntl_setpriority, pcntl_signal_dispatch, pcntl_signal, pcntl_sigprocmask, pcntl_sigtimedwait, pcntl_sigwaitinfo, pcntl_strerror, pcntl_wait, pcntl_waitpid, pcntl_wexitstatus, pcntl_wifexited, pcntl_wifsignaled, pcntl_wifstopped, pcntl_wstopsig, pcntl_wtermsig, dl, leak, posix_kill, posix_mkfifo, posix_setpgid, posix_setsid, posix_setuid | This directive allows you to disable certain functions for security reasons. It takes on a comma-delimited list of function names. disable_functions is not affected by Safe Mode. ; 1 sensitive functions were found in the code. Don't disable those : |
| disable_classes | phar | This directive allows you to disable certain classes for security reasons. It takes on a comma-delimited list of class names. disable_classes is not affected by Safe Mode. This directive must be set in php.ini. ; 1 sensitive classes were found in the code. Don't disable those : |