codeigniter keywords

codeigniter keywords In order to help out, CodeIgniter uses a sequence of functions and names in its self. for this, Reserved Names cannot be used by a developer. Following is a list of reserved names that cannot be used.
Controller classes will extend the main application controller you must be careful not to name your functions identically to the ones used by that class, otherwise your local functions will override them. The following is a list of reserved names. Do not name your controller any of below listed:

• Controller
• CI_Base
• _ci_initialize
• Default
• index
Functions
• is_really_writable()
• load_class()
• get_config()
• config_item()
• show_error()
• show_404()
• log_message()
• _exception_handler()
• get_instance()
Variables
• $config
• $mimes
• $lang
Constants
• ENVIRONMENT
• EXT
• FCPATH
• SELF
• BASEPATH
• APPPATH
• CI_VERSION
• FILE_READ_MODE
• FILE_WRITE_MODE
• DIR_READ_MODE
• DIR_WRITE_MODE
• FOPEN_READ
• FOPEN_READ_WRITE
• FOPEN_WRITE_CREATE_DESTRUCTIVE
• FOPEN_READ_WRITE_CREATE_DESTRUCTIVE
• FOPEN_WRITE_CREATE
• FOPEN_READ_WRITE_CREATE
• FOPEN_WRITE_CREATE_STRICT
• FOPEN_READ_WRITE_CREATE_STRICT