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(PHP 5 >= 5.1.0, PHP 7, PHP 8)
readline_callback_read_char — Reads a character and informs the readline callback interface when a line is received
Reads a character of user input. When a line is received, this function informs the readline callback interface installed using readline_callback_handler_install() that a line is ready for input.
This function is only available if the readline library PHP was built against supports it. It is not available on Windows.
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See readline_callback_handler_install() for an example of how to use the readline callback interface.
