hwo to read out variables ?

Hi, I want to read out values with a extension function from the running PHP skript. i wrote something like that: pval **print_trace; // i also tried (zval) if(zend_hash_find(&EG(symbol_table),"print_trace",12,(void **) &print_trace)!=FAILURE){ PHPWRITE((*print_trace)->value.str.val, (*print_trace)->value.str.len); } print_trace is the global variable in the php skript. start this programm produce a core dump, if i use (*print_trace)->value.str.val in any way. here the backtrace: #0 0x40140bd1 in _IO_new_file_xsputn (f=0x401dc7c0, data=0x1, n=11) at fileops.c:765 #1 0x4013ce6e in _IO_fwrite (buf=0x1, size=1, count=11, fp=0x401dc7c0) at iofwrite.c:44 #2 0x805c08b in sapi_cgibin_ub_write (str=0x1 <Address 0x1 out of bounds>, str_length=11) at cgi_main.c:93 #3 0x80b3403 in php_ub_body_write_no_header ( str=0x1 <Address 0x1 out of bounds>, str_length=11) at output.c:312 #4 0x80b3494 in php_ub_body_write (str=0x1 <Address 0x1 out of bounds>, str_length=11) at output.c:349 #5 0x80b3092 in php_body_write (str=0x1 <Address 0x1 out of bounds>, str_length=11) at output.c:81 #6 0x8067216 in zend_if_trace (ht=4, return_value=0x816b1ec, this_ptr=0x0, return_value_used=0) at inubit.c:196 #7 0x80f42b5 in execute (op_array=0x816b104) at ./zend_execute.c:1519 #8 0x80c9aa8 in zend_execute_scripts (type=8, file_count=3) at zend.c:712 #9 0x805e5d1 in php_execute_script (primary_file=0xbffff594) at main.c:1173 #10 0x805cc29 in main (argc=2, argv=0xbffff5f4) at cgi_main.c:711 iam on the wrong way ? how else can i read out variables ? thanks for help, thomas -- ----------------------------------------------------------------- InUBIT - your e-business partner! http://www.inubit.com http://tfromm.com mailto:tf@inubit.com "go away or I will replace you with a small php script."