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* PHP-8.2: ext/readline: Fix [-Wcalloc-transposed-args] compiler warning ext/pdo_mysql: Fix [-Wcalloc-transposed-args] compiler warning ext/gd: Fix [-Wcalloc-transposed-args] compiler warning ext/ffi: Fix [-Wenum-int-mismatch] compiler warning ext/bcmath: Fix [-Wenum-int-mismatch] compiler warning
readline
Provides generic line editing, history, and tokenization functions. See https://www.php.net/manual/en/book.readline.php
Implementation Details
C variables starting with rl_* are declared by the readline library
(or are macros referring to variables from the libedit library).
See http://web.mit.edu/gnu/doc/html/rlman_2.html
This should only be used in the CLI SAPI. Historically, the code lived in sapi/cli, but many distributions build readline as a shared extension. Therefore, that code was split into ext/readline so that this can dynamically be loaded. With other SAPIs, readline is/should be disabled.
readline_cli.c implements most of the interactive shell(php -a).