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.

The apache_get_modules method works only if the PHP is installed as an Apache Module (mod_php). Create a PHP file – e.g. apachemodules.php and add the following content and access it in your 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());

?>