从HHVM C ++扩展运行PHP函数

Question

Is it possible? Without using Zend API, only Native. For use it like in PHP extension:

call_user_function(EG(function_table), NULL, &func, &retval, 1, params);

Answer 1

You most likely want vm_call_user_func().

Variant vm_call_user_func(const Variant& function, const Variant& params,
                          bool forwarding = false);

Depending on what your extension is doing at the time of the call, you likely will want to catch exceptions the function may throw.

try {
  vm_call_user_func(function, params);
} catch (const Object&) {
  try {
    raise_warning("got exception in my extension");
  } catch (const Object&) {
    // exception in error handler!
  }
}

vm_call_user_func knows how to handle the various ways PHP defines callables (e.g. "SomeClass::someMethod", array($obj, "method")).

Depending on how the function to call is being provided, there may be more optimal ways. You could require that instead of any arbitrary callback, the user must provide a closure object. Since a closure object is always callable (i.e. you don't have to validate that SomeClass exists in my "SomeClass::someMethod" example), you can extract the underlying object, store it instead of the Variant and vm_call_user_func() will save some overhead decoding and validating it.