How To Get Loaded Apache Modules?

It is easy to get the list of loaded Apache modules if you have SSH access to the server. 

The steps include using the httpd command with the -M option. You can obtain the list of loaded Static and Shared Modules by using the -M option.

# httpd -M

root@web [~]# httpd -M
Loaded Modules:
 core_module (static)
 so_module (static)
 http_module (static)
 mpm_event_module (shared)
 systemd_module (shared)
 lsapi_module (shared)
 cgid_module (shared)
 access_compat_module (shared)
 actions_module (shared)
 alias_module (shared)
 auth_basic_module (shared)
 authn_core_module (shared)
 authn_dbm_module (shared)
 authn_file_module (shared)
 authn_socache_module (shared)
 authz_core_module (shared)
 authz_groupfile_module (shared)
 authz_host_module (shared)
 authz_user_module (shared)
 autoindex_module (shared)
 dbd_module (shared)
 deflate_module (shared)
 dir_module (shared)
 expires_module (shared)
 filter_module (shared)
 headers_module (shared)
 include_module (shared)
 log_config_module (shared)
 logio_module (shared)
 mime_module (shared)
 negotiation_module (shared)
 proxy_module (shared)
 proxy_http_module (shared)
 proxy_wstunnel_module (shared)
 reqtimeout_module (shared)
 rewrite_module (shared)
 setenvif_module (shared)
 slotmem_shm_module (shared)
 socache_dbm_module (shared)
 socache_shmcb_module (shared)
 socache_redis_module (shared)
 status_module (shared)
 suexec_module (shared)
 unique_id_module (shared)
 unixd_module (shared)
 userdir_module (shared)
 bwlimited_module (shared)
 ssl_module (shared)
 http2_module (shared)
 security2_module (shared)
root@web [~]#

Add the grep command to check if a specific module is loaded. To check if the SSL module is present, use the following code:

# httpd -M | grep ssl

[root@web ~]# httpd -M | grep ssl
 ssl_module (static)
[root@web ~]#

You can use the apache_get_modules PHP function to get the loaded Apache modules if you do not have SSH access to the webserver.

Only when PHP is installed as an Apache Module (mod_php) can the apache_get_modules method be used. Make a PHP file, such as apachemodules.php, add the content below, and open it in a browser.

<?php
// prints Apache Modules - works only if the PHP is installed as an Apache Module
echo 'The Apache Modules found on the server are:</br>';

print_r(apache_get_modules());

?>