strval.phpt: Output order.

Please add this line at the beginning of LangFunctions#strval method, before return statement:

        if (memory.isArray()) {
            env.notice(trace, "Array to string conversion");
        }

Please run strval.phpt.

The actual result is:

Notice: Array to string conversion in 'strval.phpt' on line 11 at pos 10
string(3) "bar"
string(3) "BAR"
string(6) "foobar"
string(1) "1"
string(3) "1.1"
string(1) "1"
string(0) ""
string(5) "Array"

but if we replace last array with variable (not constant) or remove @Immutable annotation from LangFunctions#strval every thing works as expected except new line before notice message.

I could only guess that constant expression are evaluated earlier then expression that needs a runtime environment to compute their values. The notice message is written to output buffer earlier then everything else. What does this @Immutable thing mean? It’s sort of no side effect method?

BTW, there is no javadoc on php.runtime.annotation package annotations, please can you document them?

[dim-s]

If a function is marked as @Immutable the all calls of this function in bytecode will be genereated as direct calls via JVM CALL instructions. This summary allows you to greatly reduce the time spent on a function call.

[dim-s]

We will not fix, because does not break backward compatibility at the code execution level.