Value::operator=(Value &&value) does not work when this is a reference

[jonmcclung]

The following code produces an unexpected result:

#include <phpcpp.h>

void withMoveConstructor(Php::Parameters &params) {
  params[0] = Php::Value("withMoveConstructor worked");
}

void withCopyConstructor(Php::Parameters &params) {
  Php::Value temp = Php::Value("withCopyConstructor worked");
  params[0] = temp;
}

extern "C" {
    PHPCPP_EXPORT void *get_module() {
        static Php::Extension extension("extension", "1.0");
        extension.add<withMoveConstructor>("withMoveConstructor",{
            Php::ByRef("value", Php::Type::String)
        });
        extension.add<withCopyConstructor>("withCopyConstructor",{
            Php::ByRef("value", Php::Type::String)
        });
        return extension;
    }
}

<?php

$a = "withMoveConstructor failed";
$b = "withCopyConstructor failed";

withMoveConstructor($a);
withCopyConstructor($b);

echo "$a, $b";

return;

Expected output:
withMoveConstructor worked, withCopyConstructor worked

Actual output:
withMoveConstructor failed, withCopyConstructor worked

I expect this is related to #300. Is there any chance this can be fixed? In this example it simply failed to set the value but I have run into a lot of cases where it produces a segmentation fault instead.

[scorninpc]

You always should store the value to Php::Value, and store Php::Vaue into z_val. Notice: c are typed, so param are refenced by z_val, but param[0] are pointed to hashtable of zend engine.

In other words, param[0] aren't reference variable

sorry if my english are confuse