Re: Re: intercepting function calls

OK you got a point. It doesn't really hurt to keep it so I'll leave it all in. I can think of cases where using those opcodes might be easier to use at runtime than overloading zend_execute. Andi At 09:09 AM 2/11/2005 +0100, Derick Rethans wrote:

On Thu, 10 Feb 2005, Andi Gutmans wrote: At 11:01 AM 2/9/2005 -0500, George Schlossnagle wrote:

On Feb 9, 2005, at 10:57 AM, Sara Golemon wrote:

Is it possible to intercept a function call (user space or built-in) in the Zend Engine and execute user space code before/after the function call?

Yes, you can do this by way of a Zend extension (not a PHP extension mind you). The parts of Zend/zend_extensions.h you'll want to pay attention to are:

You can also do this by directly wrapping zend_execute. This is the preferred method if you're writing a profiler or such.

Yeah. Actually I thought we already nuked the old way. Is anyone using it? I'm using: ZEND_DLEXPORT zend_extension zend_extension_entry = {

    XDEBUG_NAME,
    XDEBUG_VERSION,
    XDEBUG_AUTHOR,
    XDEBUG_URL,
    "Copyright (c) 2002, 2003, 2004",
    xdebug_zend_startup,
    xdebug_zend_shutdown,
    NULL,           /* activate_func_t */
    NULL,           /* deactivate_func_t */
    NULL,           /* message_handler_func_t */
    NULL,           /* op_array_handler_func_t */
    xdebug_statement_call, /* statement_handler_func_t */
    NULL,           /* fcall_begin_handler_func_t */
    NULL,           /* fcall_end_handler_func_t */
    NULL,           /* op_array_ctor_func_t */
    NULL,           /* op_array_dtor_func_t */
    STANDARD_ZEND_EXTENSION_PROPERTIES

}; I really need the statement call callback for single stepping through code. regards, Derick -- Derick Rethans http://derickrethans.nl | http://ez.no | http://xdebug.org