[PHP-DEV] Re: Help: call_user_function() core dumps

[Dhiru Pandey]

Thanks Johannes,

Your suggestions were spot on. Thanks again - Dhiru

Johannes Schlüter wrote:

Hi,

On Wed, 2008-04-30 at 09:52 -0700, Dhiru Pandey wrote:

I am new to PHP extension writing and embedding. Following the book from
Sara Goleman - Extending and Embedding PHP (Developer's Library)
I wrote the following program based on her example in Chap. 20

===================================================================
#include <stdio.h>
#include <stdlib.h>

#include <sapi/embed/php_embed.h>

int main(int argc, char** argv) {
      PHP_EMBED_START_BLOCK(argc, argv);

    zval* args[2];
    zval funcname;
    zval input_str;
    zval count;
    zval retval;
    char* ans;
      ZVAL_STRING(&funcname, "str_repeat", 0);
    args[0] = &input_str;
    args[1] = &count;

You have to use emalloc'ed memory for (basically) everything you give to
the engine and no pointers to local variables else the engine tries to
free these local variables.

johannes