A Complete PHP/FFI/preloading Example

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- A Complete PHP/FFI/preloading Example

## A Complete PHP/FFI/preloading Example

php.ini

    ffi.enable=preload
    opcache.preload=preload.php

preload.php

    <?phpFFI::load(__DIR__ . "/dummy.h");opcache_compile_file(__DIR__ . "/dummy.php");?>

dummy.h

    #define FFI_SCOPE "DUMMY"
    #define FFI_LIB "libc.so.6"

    int printf(const char *format, ...);

dummy.php

    <?phpfinal class Dummy {    private static $ffi = null;    function __construct() {        if (is_null(self::$ffi)) {            self::$ffi = FFI::scope("DUMMY");        }    }    function printf($format, ...$args) {       return (int)self::$ffi->printf($format, ...$args);    }}?>

test.php

    <?php$d = new Dummy();$d->printf("Hello %s!\n", "world");?>