Unable to obtain trace for php application running on apache httpd

[ankitjain235]

Hi, I was trying to get trace for php applications running on apache httpd server but could not obtain any trace for such case.
I have added following to the /etc/php.ini
extension=trace.so
enable-dtrace=1

I have the application running properly.
Apache is also picking up the same /etc/php.ini file

Although I do obtain following

Here it says Dtrace support is available but disabled. It this why it's not working or does phptrace does not support trace for such case?

Please help me on this.

[ankitjain235]

Also on adding the phptrace "so" file to httpd modules and restarting the httpd service, obtained following error:
$ sudo systemctl status httpd

● httpd.service - The Apache HTTP Server
Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)
Drop-In: /usr/lib/systemd/system/httpd.service.d
└─php-fpm.conf
Active: failed (Result: exit-code) since Tue 2018-06-12 08:49:02 UTC; 1min 22s ago
Docs: man:httpd.service(8)
Process: 13941 ExecStart=/usr/sbin/httpd $OPTIONS -DFOREGROUND (code=exited, status=1/FAILURE)
Main PID: 13941 (code=exited, status=1/FAILURE)
CPU: 13ms

Jun 12 08:49:02 ip-172-31-0-210.us-west-1.compute.internal systemd[1]: Starting The Apache HTTP Server...
Jun 12 08:49:02 ip-172-31-0-210.us-west-1.compute.internal httpd[13941]: httpd: Syntax error on line 56 of /etc/httpd/conf/httpd.conf: Cannot load modules/mod_trace.so into server: /etc/httpd/modules/mod_trace.so: undefined symbol: OnUpdateBool
Jun 12 08:49:02 ip-172-31-0-210.us-west-1.compute.internal systemd[1]: httpd.service: Main process exited, code=exited, status=1/FAILURE
Jun 12 08:49:02 ip-172-31-0-210.us-west-1.compute.internal systemd[1]: Failed to start The Apache HTTP Server.

On looking into source code, found
STD_PHP_INI_ENTRY("trace.enable", "1", PHP_INI_SYSTEM, OnUpdateBool, enable, zend_trace_globals, trace_globals)

[strictlymike]

I am having the same problem on an Ubuntu 18.04 LTS system with PHP 7.2.24.

I don't think the disposition of PHP's DTrace Support is relevant.

On an Ubuntu 16.04 LTS system with PHP 7.0, where DTrace Support is likewise available, disabled, I find that phptrace works.

[rahmatrh199]

@ankitjain235
Hi
Dear
Did you solve this problem, I am facing the same issue. If you got the solution then please help me out