diff --git a/include/functions_user.inc.php b/include/functions_user.inc.php
index 383674cfb..bc3efed9e 100644
--- a/include/functions_user.inc.php
+++ b/include/functions_user.inc.php
@@ -75,11 +75,11 @@ function register_user($login, $password, $mail_address,
   {
     array_push($errors, l10n('reg_err_login1'));
   }
-  if (preg_match("/^.* $/", $login))
+  if (preg_match('/^.* $/', $login))
   {
     array_push($errors, l10n('reg_err_login2'));
   }
-  if (preg_match("/^ .*$/", $login))
+  if (preg_match('/^ .*$/', $login))
   {
     array_push($errors, l10n('reg_err_login3'));
   }
diff --git a/tools/create_listing_file.php b/tools/create_listing_file.php
index 13fb057ab..f4ca4f8fe 100644
--- a/tools/create_listing_file.php
+++ b/tools/create_listing_file.php
@@ -203,7 +203,7 @@ function pwg_check_graphics()
     $info = gd_info();
     
     // Backup GD major version
-    $pwg_conf['gd_version_full'] = ereg_replace('[[:alpha:][:space:]()]+', '', $info['GD Version']);
+    $pwg_conf['gd_version_full'] = preg_replace('/[[:alpha:][:space:]()]+/', '', $info['GD Version']);
     list($pwg_conf['gd_version_major']) = preg_split('/[.]+/', $pwg_conf['gd_version_full']);
     
     // Backup input/output format support
@@ -1087,7 +1087,7 @@ function pwg_test_exit()
     else
     {
       $info = gd_info();
-      $gd_full_version = ereg_replace('[[:alpha:][:space:]()]+', '', $info['GD Version']);
+      $gd_full_version = preg_replace('/[[:alpha:][:space:]()]+/', '', $info['GD Version']);
       list($gd_version) = preg_split('/[.]+/', $gd_full_version);
       
       $g_message .= '        <h3>Image generation</h3>'."\n";
diff --git a/upload.php b/upload.php
index 14380a736..d1cffa25d 100644
--- a/upload.php
+++ b/upload.php
@@ -188,7 +188,7 @@ if ( isset( $_POST['submit'] ) and !isset( $_GET['waiting_id'] ) )
   {
     array_push( $error, l10n('upload_filenotfound') );
   }
-  if ( !ereg( "([_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)+)",
+  if ( !preg_match( '/([_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)+)/',
              $_POST['mail_address'] ) )
   {
     array_push( $error, l10n('reg_err_mail_address') );