(PHP 4, PHP 5, PHP 7) Reads the history bool

(PHP 4, PHP 5, PHP 7) Adds a line to the history

(PHP 4, PHP 5, PHP 7) Reads a line string readline

(PHP 4, PHP 5, PHP 7) Writes the history bool

(PHP 5 >= 5.1.0, PHP 7) Redraws the display

(PHP 5 >= 5.1.0, PHP 7) Reads a character and informs the readline callback interface when a line is received

(PHP 5 >= 5.1.0, PHP 7) Removes a previously installed callback handler and restores terminal settings

(PHP 5 >= 5.1.0, PHP 7) Initializes the readline callback interface and terminal, prints the prompt and returns

(PHP 4, PHP 5, PHP 7) Clears the history bool

(PHP 4, PHP 5, PHP 7) Gets/sets various internal readline variables