apache运行php程序,却一直显示在CGI上!

饭饭

apache1.3

以前一直运行的是perl, 今天想要调试个php程序 , 一直显示500错误,

[Fri Sep  1 20:50:53 2006] [notice] SIGHUP received.  Attempting to restart
[Fri Sep  1 20:50:53 2006] [warn] module perl_module is already loaded, skipping
[Fri Sep  1 20:50:53 2006] [notice] Apache/1.3.33 (Debian GNU/Linux) PHP/4.3.10-16linex1 mod_perl/1.29 configured -- resuming normal operations
[Fri Sep  1 20:50:53 2006] [notice] Accept mutex: sysvsem (Default: sysvsem)
[Fri Sep  1 20:50:56 2006] [error] (8)Exec format error: exec of /var/www/cgi-bin/a.php failed
[Fri Sep  1 20:50:56 2006] [error] [client 127.0.0.1] Premature end of script headers: /var/www/cgi-bin/a.php

debian:/var/log/apache$ ls -l /usr/lib/apache/1.3/|grep php
-rw-r--r--  1 root root     188 2005-12-06 23:03 500mod_php4.info
-rw-r--r--  1 root root 3122960 2005-12-06 23:04 libphp4.so

谁帮看看再哪出错了 , 昏