diff --git a/doc.html b/doc.html
new file mode 100644
index 0000000..03cfe30
Binary files /dev/null and b/doc.html differ
diff --git a/manual/includes/_upload-file.md b/manual/includes/_upload-file.md
index ed2b570..23c376b 100644
--- a/manual/includes/_upload-file.md
+++ b/manual/includes/_upload-file.md
@@ -54,6 +54,8 @@ $files = new PicoUploadFile();
 $file1 = $files->get('myupload');
 // or alternatively
 // $file1 = $files->myupload;
+// or
+// $file1 = $files->getMyupload();
 
 $targetDir = __DIR__;
 
diff --git a/manual/index.html b/manual/index.html
index 64bc5ba..3c4f071 100644
--- a/manual/index.html
+++ b/manual/index.html
@@ -10850,6 +10850,8 @@ <h3>PHP Backend Handling</h3>
 $file1 = $files-&gt;get('myupload');
 // or alternatively
 // $file1 = $files-&gt;myupload;
+// or
+// $file1 = $files-&gt;getMyupload();
 
 $targetDir = __DIR__;
 
diff --git a/src/Database/PicoDatabasePersistence.php b/src/Database/PicoDatabasePersistence.php
index 929be1d..e695ed8 100644
--- a/src/Database/PicoDatabasePersistence.php
+++ b/src/Database/PicoDatabasePersistence.php
@@ -4,9 +4,6 @@
 use DateTime;
 use Exception;
 use MagicObject\Exceptions\ClassNotFoundException;
-use PDO;
-use PDOException;
-use PDOStatement;
 use MagicObject\Exceptions\EmptyResultException;
 use MagicObject\Exceptions\EntityException;
 use MagicObject\Exceptions\InvalidAnnotationException;
@@ -22,6 +19,9 @@
 use MagicObject\Util\ClassUtil\PicoAnnotationParser;
 use MagicObject\Util\ClassUtil\PicoEmptyParameter;
 use MagicObject\Util\Database\PicoDatabaseUtil;
+use PDO;
+use PDOException;
+use PDOStatement;
 use ReflectionProperty;
 
 /**
@@ -78,6 +78,8 @@ class PicoDatabasePersistence // NOSONAR
 
     const COMMA = ", ";
     const COMMA_RETURN = ", \r\n";
+    const INLINE_TRIM = " \r\n\t ";
+    const ALWAYS_TRUE = "(1=1)";
     
     /**
      * Database connection
@@ -355,7 +357,7 @@ private function addColumnType($columns, $reflexProp, $prop, $parameters)
         {
             if(strcasecmp($param, self::ANNOTATION_VAR) == 0 && isset($columns[$prop->name]))
             {
-                $type = explode(' ', trim($val, " \r\n\t "))[0];
+                $type = explode(' ', trim($val, self::INLINE_TRIM))[0];
                 $columns[$prop->name][self::KEY_PROPERTY_TYPE] = $type;
             }
             if(strcasecmp($param, self::SQL_DATE_TIME_FORMAT) == 0)
@@ -409,7 +411,7 @@ private function addJoinColumnType($joinColumns, $prop, $parameters)
         {
             if(strcasecmp($param, self::ANNOTATION_VAR) == 0 && isset($joinColumns[$prop->name]))
             {
-                $type = explode(' ', trim($val, " \r\n\t "))[0];
+                $type = explode(' ', trim($val, self::INLINE_TRIM))[0];
                 $joinColumns[$prop->name][self::KEY_PROPERTY_TYPE] = $type;
                 $joinColumns[$prop->name][self::KEY_ENTITY_OBJECT] = true;
             }
@@ -563,36 +565,28 @@ public function getTableInfo()
                 $parameters = $reflexProp->getParameters();
 
                 // get column name of each parameters
-                $columns = $this->addColumnName($columns, $reflexProp, $prop, $parameters);
-                
+                $columns = $this->addColumnName($columns, $reflexProp, $prop, $parameters);                
                 
                 // set column type
-                $columns = $this->addColumnType($columns, $reflexProp, $prop, $parameters);
-                
+                $columns = $this->addColumnType($columns, $reflexProp, $prop, $parameters);               
                 
                 // get join column name of each parameters
-                $joinColumns = $this->addJoinColumnName($joinColumns, $reflexProp, $prop, $parameters);
-                
+                $joinColumns = $this->addJoinColumnName($joinColumns, $reflexProp, $prop, $parameters);               
                 
                 // set join column type
-                $joinColumns = $this->addJoinColumnType($joinColumns, $prop, $parameters);
-                        
+                $joinColumns = $this->addJoinColumnType($joinColumns, $prop, $parameters);                       
 
                 // list primary key
-                $primaryKeys = $this->addPrimaryKey($primaryKeys, $columns, $prop, $parameters);
-                
+                $primaryKeys = $this->addPrimaryKey($primaryKeys, $columns, $prop, $parameters);              
 
                 // list autogenerated column
-                $autoIncrementKeys = $this->addAutogenerated($autoIncrementKeys, $columns, $reflexClass, $prop, $parameters);
-                
+                $autoIncrementKeys = $this->addAutogenerated($autoIncrementKeys, $columns, $reflexClass, $prop, $parameters);               
                 
                 // define default column value
-                $defaultValue = $this->addDefaultValue($defaultValue, $columns, $reflexClass, $prop, $parameters);
-                
+                $defaultValue = $this->addDefaultValue($defaultValue, $columns, $reflexClass, $prop, $parameters);             
 
                 // list not null column
-                $notNullColumns = $this->addNotNull($notNullColumns, $columns, $prop, $parameters);
-                
+                $notNullColumns = $this->addNotNull($notNullColumns, $columns, $prop, $parameters);              
             }
             // bring it together
             $this->tableInfoProp = new PicoTableInfo($picoTableName, $columns, $joinColumns, $primaryKeys, $autoIncrementKeys, $defaultValue, $notNullColumns, $noCache, $package);
@@ -1501,7 +1495,7 @@ protected function createWhereFromSpecification($sqlQuery, $specification, $info
     {
         $masterColumnMaps = $this->getColumnMap($info);   
         $arr = array();
-        $arr[] = "(1=1)";
+        $arr[] = self::ALWAYS_TRUE;
         if($specification != null && !$specification->isEmpty())
         {
             $specifications = $specification->getSpecifications();
@@ -1511,7 +1505,7 @@ protected function createWhereFromSpecification($sqlQuery, $specification, $info
             }
         }
         $ret = $this->joinStringArray($arr, self::MAX_LINE_LENGTH);
-        return $this->trimWhere($ret);
+        return PicoDatabaseUtil::trimWhere($ret);
     }
 
     /**
@@ -1688,17 +1682,6 @@ private function formatColumn($column, $format)
         }
         return sprintf($format, $column);
     }
-    
-    /**
-     * Trim unnecessary parts from WHERE clause
-     *
-     * @param string $where WHERE clause string
-     * @return string Trimmed WHERE clause
-     */
-    private function trimWhere($where)
-    {
-        return PicoDatabaseUtil::trimWhere($where);
-    }
 
     /**
      * Create ORDER BY clause
diff --git a/src/Util/Database/PicoDatabaseUtil.php b/src/Util/Database/PicoDatabaseUtil.php
index 6fc92df..b8a8209 100644
--- a/src/Util/Database/PicoDatabaseUtil.php
+++ b/src/Util/Database/PicoDatabaseUtil.php
@@ -297,7 +297,7 @@ public static function escapeSQL($value)
         return addslashes($value);
     }
 
-   /**
+    /**
      * Trim a WHERE clause by removing unnecessary characters.
      *
      * This method cleans up a raw WHERE clause by trimming whitespace
diff --git a/tutorial.md b/tutorial.md
index ae12ad7..0a75b0e 100644
--- a/tutorial.md
+++ b/tutorial.md
@@ -12305,6 +12305,8 @@ $files = new PicoUploadFile();
 $file1 = $files->get('myupload');
 // or alternatively
 // $file1 = $files->myupload;
+// or
+// $file1 = $files->getMyupload();
 
 $targetDir = __DIR__;