Code revised with reactor

Applied rules:
 * SimplifyIfReturnBoolRector
 * ReduceAlwaysFalseIfOrRector

Author: DanProgs

lib/functions/common.php

@@ -691,11 +691,8 @@ function config_get($config_id, $default = null)
 function isBlank($p_var)
 {
     $p_var = trim($p_var);
-    $str_len = strlen($p_var);
-    if (0 == $str_len) {
-        return true;
-    }
-    return false;
+    $str_len = strlen($p_var);
+    return 0 == $str_len;
 }
 
 /**

lib/functions/string_api.php

@@ -494,13 +494,9 @@ function string_prepare_header($p_string)
  * @param string $p_string
  * @return boolean
  */
-function string_contains_scripting_chars($p_string)
-{
-    if ((strstr($p_string, '<') !== false) || (strstr($p_string, '>') !== false)) {
-        return true;
-    }
-
-    return false;
+function string_contains_scripting_chars($p_string)
+{
+    return (strstr($p_string, '<') !== false) || (strstr($p_string, '>') !== false);
 }
 
 /**

lib/functions/tree.class.php

@@ -1343,7 +1343,7 @@ public function nodeNameExists($name, $node_type_id, $id = null,
         $parentNodeID = intval($parent_id);
         if (! is_null($id)) {
             // Try to get parent id if not provided on method call.
-            if (is_null($parentNodeID) || $parentNodeID <= 0) {
+            if ($parentNodeID <= 0) {
                 $sql = "/* {$debugMsg} */ " .
                     " SELECT parent_id FROM {$this->object_table} NHA " .
                     " WHERE NHA.id = " . $this->db->prepare_int($id);