diff --git a/include/inc_act/act_structure.php b/include/inc_act/act_structure.php
index 2caf206e2..d354a4403 100644
--- a/include/inc_act/act_structure.php
+++ b/include/inc_act/act_structure.php
@@ -82,9 +82,9 @@
     if(isset($_POST["acat_id"]) && $_POST["acat_id"] === 'index') {
         // write index page config to flat file
         $sql  = "<?php\n";
-        $sql .= "\$indexpage['acat_name'] = '". str_replace("''", "\\'", clean_slweg($_POST["acat_name"], 2000))."';\n";
-        $sql .= "\$indexpage['acat_title'] = '". str_replace("''", "\\'", clean_slweg($_POST["acat_title"], 2000))."';\n";
-        $sql .= "\$indexpage['acat_info'] = '". str_replace("''", "\\'", clean_slweg($_POST["acat_info"], 32000))."';\n";
+        $sql .= "\$indexpage['acat_name'] = '". sanitize_quote_backslash(clean_slweg($_POST["acat_name"], 2000))."';\n";
+        $sql .= "\$indexpage['acat_title'] = '". sanitize_quote_backslash(clean_slweg($_POST["acat_title"], 2000))."';\n";
+        $sql .= "\$indexpage['acat_info'] = '". sanitize_quote_backslash(clean_slweg($_POST["acat_info"], 32000))."';\n";
         $sql .= "\$indexpage['acat_alias'] = '". proof_alias($_POST["acat_id"], $_POST["acat_alias"])."';\n";
         $sql .= "\$indexpage['acat_aktiv'] = ". (isset($_POST["acat_aktiv"]) ? 1 : 0).";\n";
         $sql .= "\$indexpage['acat_template'] = ". intval($_POST["acat_template"]).";\n";
@@ -93,7 +93,7 @@
         $sql .= "\$indexpage['acat_regonly'] = ". (isset($_POST["acat_regonly"]) ? 1 : 0).";\n";
         $sql .= "\$indexpage['acat_topcount'] = ". intval($_POST["acat_topcount"]).";\n";
         $sql .= "\$indexpage['acat_maxlist'] = ". intval($_POST["acat_maxlist"]).";\n";
-        $sql .= "\$indexpage['acat_redirect'] = '". str_replace("''", "\\'", clean_slweg($_POST["acat_redirect"]))."';\n";
+        $sql .= "\$indexpage['acat_redirect'] = '". sanitize_quote_backslash(clean_slweg($_POST["acat_redirect"]))."';\n";
         $cache_timeout = clean_slweg($_POST["acat_timeout"]);
         if(isset($_POST['acat_cacheoff']) && intval($_POST['acat_cacheoff'])) $cache_timeout = 0; //check if cache = Off
         $sql .= "\$indexpage['acat_timeout'] = '". $cache_timeout."';\n";
@@ -102,16 +102,16 @@
         $sql .= "\$indexpage['acat_order'] = ". set_correct_ordersort() .";\n";
         $sql .= "\$indexpage['acat_permit'] = '". $acat_permit."';\n";
         $sql .= "\$indexpage['acat_cntpart'] = '". $acat_cntpart."';\n";
-        $sql .= "\$indexpage['acat_pagetitle'] = '". str_replace("''", "\\'", clean_slweg($_POST["acat_pagetitle"]))."';\n";
+        $sql .= "\$indexpage['acat_pagetitle'] = '". sanitize_quote_backslash(clean_slweg($_POST["acat_pagetitle"]))."';\n";
         $sql .= "\$indexpage['acat_paginate'] = ". (isset($_POST["acat_paginate"]) ? 1 : 0).";\n";
-        $sql .= "\$indexpage['acat_overwrite'] = '". str_replace("''", "\\'", clean_slweg($_POST["acat_overwrite"]))."';\n";
+        $sql .= "\$indexpage['acat_overwrite'] = '". sanitize_quote_backslash(clean_slweg($_POST["acat_overwrite"]))."';\n";
         $sql .= "\$indexpage['acat_archive'] = ". (empty($_POST["acat_archive"]) ? 0 : 1) .";\n";
-        $sql .= "\$indexpage['acat_class'] = '". str_replace("'", "\\'", $acat_class)."';\n";
-        $sql .= "\$indexpage['acat_keywords'] = '". str_replace("'", "\\'", $acat_keywords)."';\n";
+        $sql .= "\$indexpage['acat_class'] = '". sanitize_quote_backslash($acat_class)."';\n";
+        $sql .= "\$indexpage['acat_keywords'] = '". sanitize_quote_backslash($acat_keywords)."';\n";
         $sql .= "\$indexpage['acat_cpdefault'] = ". intval($_POST["acat_cpdefault"]).";\n";
         $sql .= "\$indexpage['acat_disable301'] = ". (empty($_POST["acat_disable301"]) ? 0 : 1).";\n";
         $sql .= "\$indexpage['acat_opengraph'] = ". (empty($_POST["acat_opengraph"]) ? 0 : 1).";\n";
-        $sql .= "\$indexpage['acat_canonical'] = '". str_replace("'", "\\'", clean_slweg($_POST["acat_canonical"], 2000))."';\n";
+        $sql .= "\$indexpage['acat_canonical'] = '". sanitize_quote_backslash(clean_slweg($_POST["acat_canonical"], 2000))."';\n";
         $sql .= "\$indexpage['acat_breadcrumb'] = ". $acat_breadcrumb .";\n";
         $sql .= "\$indexpage['acat_onepage'] = ". $acat_onepage .";\n";
 
diff --git a/include/inc_front/front.func.inc.php b/include/inc_front/front.func.inc.php
index 5595656c2..38772ccb1 100755
--- a/include/inc_front/front.func.inc.php
+++ b/include/inc_front/front.func.inc.php
@@ -1883,7 +1883,6 @@ function get_related_articles($keywords, $current_article_id, $template_default,
         foreach($keywordarray as $value) {
                 //build where keyword = blabla
                 $where .= ($where) ? " OR " : "";
-                //replace every "'" to "''" for security reasons with _dbEscape()
                 $where .= "article_keyword LIKE "._dbEscape($value, true, '%', '%');
         }
         $limit = ($max_cnt_links) ? " LIMIT ".$max_cnt_links : "";
diff --git a/include/inc_lib/general.inc.php b/include/inc_lib/general.inc.php
index 23b45cfd2..af937bb3c 100755
--- a/include/inc_lib/general.inc.php
+++ b/include/inc_lib/general.inc.php
@@ -1661,6 +1661,18 @@ function sanitize_filename($filename) {
     return $filename;
 }
 
+/**
+ * Sanitize string which will be written to set the value of a PHP variable.
+ * Should avoid users from bypassing it and execute PHP code.
+ *
+ * @param string $text
+ *
+ * @return string
+ */
+function sanitize_quote_backslash($text) {
+    return str_replace(array('\\', "'"), array("\\\\", "\\'"), $text);
+}
+
 function saveUploadedFile($file, $target, $exttype = '', $imgtype = '', $rename = 0, $maxsize = 0) {
     // imgtype can be all exif_imagetype supported by your PHP install
     // see http://www.php.net/exif_imagetype
diff --git a/include/inc_lib/revision/revision.php b/include/inc_lib/revision/revision.php
index e7598ca80..87441a140 100644
--- a/include/inc_lib/revision/revision.php
+++ b/include/inc_lib/revision/revision.php
@@ -10,5 +10,5 @@
  **/
 
 define('PHPWCMS_VERSION', '1.9.34-dev');
-define('PHPWCMS_RELEASE_DATE', '2022/07/28');
+define('PHPWCMS_RELEASE_DATE', '2022/07/31');
 define('PHPWCMS_REVISION', '553');
diff --git a/setup/inc/setup.func.inc.php b/setup/inc/setup.func.inc.php
index fbbbc7bb3..00d85c955 100644
--- a/setup/inc/setup.func.inc.php
+++ b/setup/inc/setup.func.inc.php
@@ -119,7 +119,7 @@ function clean_slweg($string_wo_slashes_weg, $string_laenge = 0) {
 }
 
 function escape_quote($text='') {
-    return str_replace(array('\\', "'"), array('\\\\', "\'"), $text);
+    return str_replace(array('\\', "'"), array('\\\\', "\\'"), $text);
 }
 
 function write_conf_file($val) {