Foreign Function Interface Call a libc function sched_getcpu(); ]]> Loading and calling library functions new("uint8_t[12]"); /* 4 colours: 000000, FF0000, 00FF00, 0000FF */ $cols[3] = 0xFF; $cols[7] = 0xFF; $cols[11] = 0xFF; $gif = $ffi->ge_new_gif("test.gif", $w, $h, $cols, 2, 0); for($i = 0; $i < 16; $i++) { for ($j = 0; $j < $w*$h; $j++) { $gif->frame[$j] = ($i*6 + $j) / 12 % 8; } $ffi->ge_add_frame($gif, 5); } $ffi->ge_close_gif($gif); ]]> Preloading FFI /etc/php8/php-fpm-fcgi.ini: preload.php: cpuinfo-ffi.h ]]> Edit cpuinfo-ffi.h and delete any inline code Create a wrapper class cpuinfo_initialize(); } static function name() { self::init(); $CData = self::$cpu->cpuinfo_get_package(0); return FFI::string($CData[0]->name); } static function __callStatic(string $function, array $args) { self::init(); return self::$cpu->{'cpuinfo_'.$function}(...$args); } } ]]> Mapping a C struct {'cpufreq_'.$function}(...$args); if ($ret instanceof FFI\CData) { switch (FFI::typeof($ret)->getName()) { case 'char*': $ret = FFI::string($ret); break; case 'struct cpufreq_policy*': $ret = [ 'min' => $ret->min, 'max' => $ret->max, 'gov' => FFI::string($ret->governor) ]; break; } } return $ret; } } ]]> Calling it