PHPのお勉強！

PHP TOP
PHP 8.4.2 Released!

    FFI::cdef

    (PHP 7 >= 7.4.0, PHP 8)

    FFI::cdef — Creates a new FFI object

    説明

    public static FFI::cdef(string $code = "", ?string $lib = null): FFI

    Creates a new FFI object.

    パラメータ

    code

    A string containing a sequence of declarations in regular C language (types, structures, functions, variables, etc). Actually, this string may be copy-pasted from C header files.

    注意:

    C preprocessor directives are not supported, i.e. #include, #define and CPP macros do not work.

    lib

    The name of a shared library file, to be loaded and linked with the definitions.

    注意:

    If lib is omitted or null, platforms supporting RTLD_DEFAULT attempt to lookup symbols declared in code in the normal global scope. Other systems will fail to resolve these symbols.

    戻り値

    Returns the freshly created FFI object.

    変更履歴

    バージョン 説明
    8.3.0 C functions returning void return a PHP null instead of FFI\CType::TYPE_VOID.
    8.0.0 lib is nullable now.

    Found A Problem?

    Learn How To Improve This Page • Submit a Pull Request • Report a Bug
    ＋add a note

    User Contributed Notes 1 note

    up
    0
    derrekbertrand at gmail dot com
    4 years ago
    You'll probably want to add a C header file, but as of the current version preprocessor directives do not work... so what do? On systems with GCC run the file through this command:

    cpp -P /usr/include/unprocessedheader.h -o myprettyheader.h

    Note that because preprocessing is not suppored in FFI, C/C++ macros are not supported either. You'll probably still have to write a small wrapper in C unless your library has an exceedingly simple public API.
    ＋add a note
    To Top