X-Git-Url: https://vcs.fsf.org/?a=blobdiff_plain;f=CRM%2FUtils%2FString.php;h=4b230e1879ce9e9eb82089e04efd7d4bce856689;hb=f8307138bf292130a628e68f346535b398ae9b63;hp=93e96d05e05fd0cdf95d6440acf6136f5067c9ae;hpb=c5479cc1511eb8204fe9238e138dbb43c0ab2919;p=civicrm-core.git

diff --git a/CRM/Utils/String.php b/CRM/Utils/String.php
index 93e96d05e0..4b230e1879 100644
--- a/CRM/Utils/String.php
+++ b/CRM/Utils/String.php
@@ -529,7 +529,7 @@ class CRM_Utils_String {
    */
   public static function stripAlternatives($full) {
     $matches = [];
-    preg_match('/-ALTERNATIVE ITEM 0-(.*?)-ALTERNATIVE ITEM 1-.*-ALTERNATIVE END-/s', $full, $matches);
+    preg_match('/-ALTERNATIVE ITEM 0-(.*?)-ALTERNATIVE ITEM 1-.*-ALTERNATIVE END-/s', ($full ?? ''), $matches);
 
     if (isset($matches[1]) &&
       trim(strip_tags($matches[1])) != ''
@@ -639,7 +639,7 @@ class CRM_Utils_String {
       $_filter = new HTMLPurifier($config);
     }
 
-    return $_filter->purify($string);
+    return $_filter->purify($string ?? '');
   }
 
   /**
@@ -878,7 +878,7 @@ class CRM_Utils_String {
       return TRUE;
     }
     $len = strlen($fragment ?? '');
-    return substr($string, 0, $len) === $fragment;
+    return substr(($string ?? ''), 0, $len) === $fragment;
   }
 
   /**
@@ -895,7 +895,7 @@ class CRM_Utils_String {
       return TRUE;
     }
     $len = strlen($fragment ?? '');
-    return substr($string, -1 * $len) === $fragment;
+    return substr(($string ?? ''), -1 * $len) === $fragment;
   }
 
   /**