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Reply-To: <mdolezal@noctuint.cz>
To: <internals@lists.php.net>
Date: Wed, 8 Jan 2020 15:59:28 +0100
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Subject: zend_call_method with arguments passed by reference
From: internals@lists.php.net ("mdolezal.noctuint.cz via internals")

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Hello,

I hope this is the appropriate mailing list, please redirect me to better
please if required.

 

I am currently rewriting our PHP extension from PHP5 to PHP7.

To call PHP methods from our C/C++ code we use slightly modified
zend_call_method from Zend/zend_interfaces.c (to use more arguments than 2).


Now I found out that it does not work with arguments passed by reference,
such as:

public function FuncWithRef(array &$changeThis)

 

if values are changed in the PHP code then zval values back in C part after
zend_call_function call are not influenced.

With PHP5 the value was overwritten and could be used later in C code.

Previously the zend_fcall_info struct for function call was filled with
params simply by

 

params[0] = &arg1;

 

In PHP7 this is changed to

 

ZVAL_COPY_VALUE(&params[0], arg1);

 

After function is executed (zend_call_function) both fci.params and arg1
contain still the original zval values,

changes made in PHP code are not available. Is there any way how to solve
this?

I am mainly searching for and comparing code snippets in PHP/ext folder to
see how things were rewritten from PHP5 to PHP7.

Sorry if I missed something obvious and thank you for your help.


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