## A Complete PHP/FFI/preloading Example

php.ini

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

preload.php

`<?php
FFI::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

`<?php
final 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");
?>`