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✏️ Editing: self_test.php

<?php
namespace W3TC;

if ( !defined( 'W3TC' ) )
	die();

?>
<h3><?php _e( 'Compatibility Check', 'w3-total-cache' ); ?></h3>

<?php _e( 'Installed/Ok/Yes/True: Functionality will work properly.', 'w3-total-cache' ); ?> 
 <?php _e( 'Not detected/Not installed/Off: May be installed, but cannot be automatically confirmed. Functionality will be limmited.', 'w3-total-cache' ); ?> 
 <?php _e( 'Not Installed/Error/No/False: Plugin or some functions may not work.', 'w3-total-cache' ); ?> 
 
</fieldset>

<li>
 Web Server:
 <?php if ( stristr( $_SERVER['SERVER_SOFTWARE'], 'apache' ) !== false ): ?>
 <code>Apache</code>
 <?php elseif ( stristr( $_SERVER['SERVER_SOFTWARE'], 'LiteSpeed' ) !== false ): ?>
 <code>Lite Speed</code>
 <?php elseif ( stristr( $_SERVER['SERVER_SOFTWARE'], 'nginx' ) !== false ): ?>
 <code>nginx</code>
 <?php elseif ( stristr( $_SERVER['SERVER_SOFTWARE'], 'lighttpd' ) !== false ): ?>
 <code>lighttpd</code>
 <?php elseif ( stristr( $_SERVER['SERVER_SOFTWARE'], 'iis' ) !== false ): ?>
 <code>Microsoft IIS</code>
 <?php else: ?>
 Not detected
 <?php endif; ?>
 </li>

<li>
 FTP functions:
 <?php if ( function_exists( 'ftp_connect' ) ): ?>
 Installed
 <?php else: ?>
 Not installed
 <?php endif; ?>
 <?php _e( '(required for Self-hosted (<acronym title="File Transfer Protocol">FTP</acronym>) <acronym title="Content Delivery Network">CDN</acronym> support)', 'w3-total-cache' ); ?>
 </li>

<li>
 zlib extension:
 <?php if ( function_exists( 'gzencode' ) ): ?>
 <?php _e( 'Installed', 'w3-total-cache' ); ?>
 <?php else: ?>
 <?php _e( 'Not installed', 'w3-total-cache' ); ?>
 <?php endif; ?>
 <?php _e( '(required for compression support)', 'w3-total-cache' ); ?>
 </li>

<li>
 Opcode cache:
 <?php if ( Util_Installed::opcache() ): ?>
 <?php _e( 'Installed (OPCache)', 'w3-total-cache' ); ?>
 <?php elseif ( Util_Installed::apc() ): ?>
 <?php _e( 'Installed (APC)', 'w3-total-cache' ); ?>
 <?php elseif ( Util_Installed::eaccelerator() ): ?>
 <?php _e( 'Installed (eAccelerator)', 'w3-total-cache' ); ?>
 <?php elseif ( Util_Installed::xcache() ): ?>
 <?php _e( 'Installed (XCache)', 'w3-total-cache' ); ?>
 <?php elseif ( PHP_VERSION >= 6 ): ?>
 <?php _e( 'PHP6', 'w3-total-cache' ); ?>
 <?php else: ?>
 <?php _e( 'Not installed', 'w3-total-cache' ); ?>
 <?php endif; ?>
 </li>

<li>
 <?php _e( 'Mime type detection:', 'w3-total-cache' ); ?>
 <?php if ( function_exists( 'finfo_open' ) ): ?>
 <?php _e( 'Installed (Fileinfo)', 'w3-total-cache' ); ?>
 <?php elseif ( function_exists( 'mime_content_type' ) ): ?>
 <?php _e( 'Installed (mime_content_type)', 'w3-total-cache' ); ?>
 <?php else: ?>
 <?php _e( 'Not installed', 'w3-total-cache' ); ?>
 <?php endif; ?>
 <?php _e( '(required for <acronym title="Content Delivery Network">CDN</acronym> support)', 'w3-total-cache' ); ?>
 </li>

<li>
 <?php _e( 'Hash function:', 'w3-total-cache' ); ?>
 <?php if ( function_exists( 'hash' ) ): ?>
 <?php _e( 'Installed (hash)', 'w3-total-cache' ); ?>
 <?php elseif ( function_exists( 'mhash' ) ): ?>
 <?php _e( 'Installed (mhash)', 'w3-total-cache' ); ?>
 <?php else: ?>
 <?php _e( 'Not installed', 'w3-total-cache' ); ?>
 <?php endif; ?>
 <?php _e( '(required for NetDNA / MaxCDN <acronym title="Content Delivery Network">CDN</acronym> purge support)', 'w3-total-cache' ); ?>
 </li>

<?php
if ( Util_Environment::is_apache() ):
	$apache_modules = ( function_exists( 'apache_get_modules' ) ? apache_get_modules() : false );

$modules = array(
	'mod_deflate',
	'mod_env',
	'mod_expires',
	'mod_filter',
	'mod_ext_filter',
	'mod_headers',
	'mod_mime',
	'mod_rewrite',
	'mod_setenvif'
);
?>
 <?php foreach ( $modules as $module ): ?>
 <li>
 <?php echo $module; ?>:
 <?php if ( $apache_modules ): ?>
 <?php if ( in_array( $module, $apache_modules ) ): ?>
 <?php _e( 'Installed', 'w3-total-cache' ); ?>
 <?php else: ?>
 <?php _e( 'Not installed', 'w3-total-cache' ); ?>
 <?php endif; ?>
 <?php else: ?>
 <?php _e( 'Not detected', 'w3-total-cache' ); ?>
 <?php endif; ?>
 <?php _e( '(required for disk enhanced Page Cache and Browser Cache)', 'w3-total-cache' ); ?>
 </li>
 <?php endforeach; ?>
 <?php endif; ?>
 </ul>
 <?php $additional_checks = apply_filters( 'w3tc_compatibility_test', __return_empty_array() );
if ( $additional_checks ):?>
 <h4><?php _e( 'Additional Server Modules', 'w3-total-cache' )?></h4>
 <ul>
 <?php
	foreach ( $additional_checks as $check )
		echo '<li>', $check, '</li>';
?>
 </ul>
 <?php
	endif;
?>

MR SKB