Posted by Yasir Malik on 06/17/05 18:51

I am creating a PHP extension. In my function, I want the parameter to be
a reference. The extension function works fine only if the variable
passed is initialized. For example, here is the extension function:
ZEND_FUNCTION(first_module)
{
zval *parameter;

if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC,
"z", &parameter) == FAILURE)
return;

ZVAL_LONG(parameter, 78);
}

When I call this as
<?php
dl("test.so");
$a = 4;
first_module($a);
print "$a\n";
?>

it works fine, but when I call it as:
<?php
dl("test.so");
first_module($a);
print "$a\n";
?>

nothing is outputted. I looked at the source code for various extensions,
and I noticed that they called the deconstructor zval_dtor(). I tried
this, but it still did not work:
ZEND_FUNCTION(first_module)
{
zval *parameter;

if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC,
"z", &parameter) == FAILURE)
return;

zval_dtor(parameter);
ZVAL_LONG(parameter, 78);
}

Thanks,
Yasir

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