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Subject: Writeing OO exteions for PHP 4.3
From: jan.gerritsen@michel-consulting.de (Jan Gerritsen)

Hello,

I want to write an OO extension in C++ for my PHP 4.3.8 under linux.

I have already written some extensions in C for my own purposes, which
introduce new functions to PHP.
Studying the sources of ext/standard/dir.c, ext/ming/ming.c and the
tutorial from J Smith (http://bugs.tutorbuddy.com/phpcpp/phpcpp/) I got
already this far:

I have managed to build and link the CPP sources as a shared object
which can be loaded and called from PHP.
I have introduced the new class to PHP using the following code in the
PHP_MINIT_FUNCTION of my extension:

static zend_class_entry *url_class_entry_ptr;
static int le_url;

function_entry url_class_functions[] =3D {
	PHP_FALIAS(url, url_init, NULL)
	PHP_FALIAS(set_string, url_set_string, NULL)
	{NULL, NULL, NULL}
};

static ZEND_RSRC_DTOR_FUNC(destroy_url)
{
     if (rsrc->ptr) {
         delete (Url_class*) rsrc->ptr;
         rsrc->ptr =3D NULL;
     }
}
PHP_MINIT_FUNCTION(url)
{
	zend_class_entry url_class_entry;
	INIT_CLASS_ENTRY(url_class_entry, "url", url_class_functions);
	url_class_entry_ptr =3D zend_register_internal_class(&url_class_entry
TSRMLS_CC);

	le_url =3D zend_register_list_destructors_ex(destroy_url, NULL, "url",
module_number);

	return SUCCESS;
}

This class can be created, and the functions (methods) can be called
from PHP.
Example:
$url =3D new URL();
$url->set_string("12345");

Now my problem is, how can I save the pointer of my C++ class, created
in the url_init function, and restore it in the other functions/methods:
PHP_FUNCTION(url_init)
{
	Url_class * url =3D new Url_class;
=09
	/ * code to save the address of url */
}

PHP_FUNCTION(url_set_string)
{
	Url_class *url =3D NULL;

	/* code to fetch url */
=09
	if( url !=3D NULL ) {
		url->set_string(=93test=94);
		RETURN_TRUE;
	}
	RETURN_FALSE;
}

I could not work out how to do this, by studying the code of the OO
extensions I mentioned.
Can someone give me a hint, ore some example code, how to do such things?=


thanks
Jan Gerritsen