i check the rc, so that $req is ok. you can var_dump($req) ----------- PROXYIO http://proxyio.org 2014-7-3 上午3:50于 "Jason E. Aten" <j.e.aten@xxxxxxxxx>写道: > On Wed, Jul 2, 2014 at 8:07 AM, Dong Fang <yp.fangdong@xxxxxxxxx> wrote: > >> hi, all >> >> i am writing one php extension for proxyio project. >> here is the testing code. >> https://raw.githubusercontent.com/pipul/xio/master/binding/php/ts.php >> >> this line will make program coredump. if i remove this line, the program >> work well!. >> >> $tmp = $req->hdr; >> >> can anyone help me ? i'am not good at this. >> >> > Core dumps on pointer dereference usually mean that the pointer ($req) is > null or not a real pointer. At the least, check for null-ness before using > it. > >