diff -ruN phpki.old/phpki-0.82/include/openssl_functions.php phpki/phpki-0.82/include/openssl_functions.php
--- phpki.old/phpki-0.82/include/openssl_functions.php	2018-11-17 14:06:06.551603435 +0100
+++ phpki/phpki-0.82/include/openssl_functions.php	2018-11-17 14:07:21.651270471 +0100
@@ -801,31 +801,31 @@
 	$certtext = CA_cert_text($serial);
 
 	#if (ereg('OpenSSL.* (E.?mail|Personal) .*Certificate', $certtext) && ereg('Code Signing', $certtest)) {
-	if (preg_match('OpenSSL.* (E.?mail|Personal) .*Certificate', $certtext) && preg_match('Code Signing', $certtest)) {
+	if (preg_match('~OpenSSL.* (E.?mail|Personal) .*Certificate~', $certtext) && preg_match('~Code Signing~', $certtest)) {
 		$cert_type = 'email_codesigning';
 	}
 	#if (ereg('OpenSSL.* (E.?mail|Personal) .*Certificate', $certtext)) {
-	if (preg_match('OpenSSL.* (E.?mail|Personal) .*Certificate', $certtext)) {
+	if (preg_match('~OpenSSL.* (E.?mail|Personal) .*Certificate~', $certtext)) {
 		$cert_type = 'email';
 	}
 	#elseif (ereg('OpenSSL.* Server .*Certificate', $certtext)) {
-	elseif (preg_match('OpenSSL.* Server .*Certificate', $certtext)) {
+	elseif (preg_match('~OpenSSL.* Server .*Certificate~', $certtext)) {
 		$cert_type = 'server';
 	}
 	#elseif (ereg('timeStamping|Time Stamping', $certtext)) {
-	elseif (preg_match('timeStamping|Time Stamping', $certtext)) {
+	elseif (preg_match('~timeStamping|Time Stamping~', $certtext)) {
 		$cert_type = 'time_stamping';
 	}
 	#elseif (ereg('TLS Web Client Authentication', $certtext) && ereg('TLS Web Server Authentication', $certtext)) {
-	elseif (preg_match('TLS Web Client Authentication', $certtext) && preg_match('TLS Web Server Authentication', $certtext)) {
+	elseif (preg_match('~TLS Web Client Authentication~', $certtext) && preg_match('~TLS Web Server Authentication~', $certtext)) {
 		$cert_type = 'vpn_client_server';
 	}
 	#elseif (ereg('TLS Web Client Authentication', $certtext)) {
-	elseif (preg_match('TLS Web Client Authentication', $certtext)) {
+	elseif (preg_match('~TLS Web Client Authentication~', $certtext)) {
 		$cert_type = 'vpn_client';
 	}
 	#elseif (ereg('TLS Web Server Authentication', $certtext)) {
-	elseif (preg_match('TLS Web Server Authentication', $certtext)) {
+	elseif (preg_match('~TLS Web Server Authentication~', $certtext)) {
 		$cert_type = 'vpn_server';
 	}
 	else {