[PHP] Problem with header()

Hi, Can anyone tell me why header cannot been used after any network operation? In my script, there are following steps: 1).a socket is opened for smtp; 2).send email; 3).closed the socket; 4).use header() to redirect to another page. If no 1), 2) and 3), 4) can be processed without any

[PHP] problem with ereg() and ereg_replace()

Hi, I have a strange problem with ereg() and ereg_replace(). I have a Linux RH 7.1 machine running apache and php4. On this server, if use ereg() or ereg_replace() with { or }, for example, ereg_replace( {key}, word, $a_string); The web server will return following warnning msg: Warning: