diff --git a/admin/admin-cli.php b/admin/admin-cli.php
index 791bef6810..c5be2c7380 100755
--- a/admin/admin-cli.php
+++ b/admin/admin-cli.php
@@ -13,7 +13,7 @@
 
 chdir(dirname(__FILE__));	// to enable our relative pathes to work
 
-if (isset($_SERVER['HTTP_HOST']))	// security precaution: forbit calling admin-cli as web-page
+if (php_sapi_name() !== 'cli')	// security precaution: forbit calling admin-cli as web-page
 {
 	die('<h1>admin-cli.php must NOT be called as web-page --> exiting !!!</h1>');
 }
diff --git a/doc/fix_depricated.php b/doc/fix_depricated.php
index 3be382d768..41bf1b45f1 100755
--- a/doc/fix_depricated.php
+++ b/doc/fix_depricated.php
@@ -14,7 +14,7 @@
  * @version $Id$
  */
 
-if (isset($_SERVER['HTTP_HOST']))	// security precaution: forbit calling as web-page
+if (php_sapi_name() !== 'cli')	// security precaution: forbit calling as web-page
 {
 	die('<h1>fix_depricated.php must NOT be called as web-page --> exiting !!!</h1>');
 }
@@ -119,7 +119,7 @@ function fix_depricated($file,$replace_file=false)
 
 	// fix call to not longer existing PDO method $result->fetchSingle()
 	$lines = str_replace('->fetchSingle(','->fetchColumn(',$lines);
-	
+
 	// fix calls to deprecated call_user_method(_array)?(method,object[,args])
 	if (preg_match('/call_user_method(_array)?\(/',$lines,$matches))
 	{
diff --git a/doc/rpm-build/checkout-build-archives.php b/doc/rpm-build/checkout-build-archives.php
index 89bd800c0c..5673925dce 100755
--- a/doc/rpm-build/checkout-build-archives.php
+++ b/doc/rpm-build/checkout-build-archives.php
@@ -9,7 +9,7 @@
  * @version $Id$
  */
 
-if (isset($_SERVER['HTTP_HOST']))	// security precaution: forbit calling setup-cli as web-page
+if (php_sapi_name() !== 'cli')	// security precaution: forbit calling setup-cli as web-page
 {
 	die('<h1>checkout-build-archives.php must NOT be called as web-page --> exiting !!!</h1>');
 }
diff --git a/doc/rpm-build/post_install.php b/doc/rpm-build/post_install.php
index a3e94551de..bb2cf5e685 100755
--- a/doc/rpm-build/post_install.php
+++ b/doc/rpm-build/post_install.php
@@ -9,7 +9,7 @@
  * @version $Id$
  */
 
-if (isset($_SERVER['HTTP_HOST']))	// security precaution: forbit calling post_install as web-page
+if (php_sapi_name() !== 'cli')	// security precaution: forbit calling post_install as web-page
 {
 	die('<h1>rpm_post_install.php must NOT be called as web-page --> exiting !!!</h1>');
 }
diff --git a/emailadmin/doc/dovecot_checkpassword_ads.php b/emailadmin/doc/dovecot_checkpassword_ads.php
index 1826355fad..7edcead3f6 100755
--- a/emailadmin/doc/dovecot_checkpassword_ads.php
+++ b/emailadmin/doc/dovecot_checkpassword_ads.php
@@ -40,7 +40,7 @@
  */
 
 // protect from being called via HTTP
-if (isset($_SERVER['HTTP_HOST'])) die('This is a command line only script!');
+if (php_sapi_name() !== 'cli') die('This is a command line only script!');
 
 // uncomment to write to log-file, otherwise errors go to stderr
 //$log = '/var/log/dovecot_checkpassword.log';
diff --git a/emailadmin/doc/postfix_tcp_map_ads.php b/emailadmin/doc/postfix_tcp_map_ads.php
index 97a8a62a9c..d44f38d587 100755
--- a/emailadmin/doc/postfix_tcp_map_ads.php
+++ b/emailadmin/doc/postfix_tcp_map_ads.php
@@ -71,7 +71,7 @@
  */
 
 // protect from being called via HTTP
-if (isset($_SERVER['HTTP_HOST'])) die('This is a command line only script!');
+if (php_sapi_name() !== 'cli') die('This is a command line only script!');
 
 // our defaults
 $default_host = 'localhost';
diff --git a/filemanager/cli.php b/filemanager/cli.php
index f35e1661d9..153ac3025d 100755
--- a/filemanager/cli.php
+++ b/filemanager/cli.php
@@ -17,7 +17,7 @@ chdir(dirname(__FILE__));	// to enable our relative pathes to work
 
 error_reporting(error_reporting() & ~E_NOTICE);
 
-if (isset($_SERVER['HTTP_HOST']))	// security precaution: forbit calling ls as web-page
+if (php_sapi_name() !== 'cli')	// security precaution: forbit calling filemanager/cli.php as web-page
 {
 	die('<h1>'.basename(__FILE__).' must NOT be called as web-page --> exiting !!!</h1>');
 }
diff --git a/setup/doc/chown.php b/setup/doc/chown.php
index 634388bedb..b1eb10d636 100755
--- a/setup/doc/chown.php
+++ b/setup/doc/chown.php
@@ -13,7 +13,7 @@
 
 chdir(dirname(__FILE__));	// to enable our relative pathes to work
 
-if (isset($_SERVER['HTTP_HOST']))	// security precaution: forbit calling as web-page
+if (php_sapi_name() !== 'cli')	// security precaution: forbit calling as web-page
 {
 	die('<h1>setup/doc/chown.php must NOT be called as web-page --> exiting !!!</h1>');
 }
diff --git a/setup/setup-cli.php b/setup/setup-cli.php
index 8f14d9ac01..a6f5168333 100755
--- a/setup/setup-cli.php
+++ b/setup/setup-cli.php
@@ -13,7 +13,7 @@
 
 chdir(dirname(__FILE__));	// to enable our relative pathes to work
 
-if (isset($_SERVER['HTTP_HOST']))	// security precaution: forbit calling setup-cli as web-page
+if (php_sapi_name() !== 'cli')	// security precaution: forbit calling setup-cli as web-page
 {
 	die('<h1>setup-cli.php must NOT be called as web-page --> exiting !!!</h1>');
 }
diff --git a/svn-helper.php b/svn-helper.php
index 30cb9950b0..e36ec44990 100755
--- a/svn-helper.php
+++ b/svn-helper.php
@@ -10,7 +10,7 @@
  * @version $Id$
  */
 
-if (isset($_SERVER['HTTP_HOST'])) die("This is a commandline ONLY tool!\n");
+if (php_sapi_name() !== 'cli') die("This is a commandline ONLY tool!\n");
 
 if ($_SERVER['argc'] <= 1) die('
 Usage: ./svn-helper.php <svn-arguments>