From upstream

src/PhpWord/Element/AbstractContainer.php

@@ -128,6 +128,20 @@ abstract class AbstractContainer extends AbstractElement
         return $this->addGenericElement('TextRun', $paragraphStyle);
     }
 
+    /**
+     * Add field element
+     * @param
+     */
+    public function addField($type = null, $properties = array(), $options = array()){
+        //$this->checkValidity('Field');
+        $elementDocPart = $this->checkElementDocPart();
+        $element = new Field($type, $properties, $options);
+        $element->setDocPart($this->getDocPart(), $this->getDocPartId());
+        $this->addElement($element);
+        
+        return $element;
+    }
+    
     /**
      * Add link element
      *

src/PhpWord/Element/Field.php

@@ -0,0 +1,180 @@
+<?php
+/**
+ * This file is part of PHPWord - A pure PHP library for reading and writing
+* word processing documents.
+*
+* PHPWord is free software distributed under the terms of the GNU Lesser
+* General Public License version 3 as published by the Free Software Foundation.
+*
+* For the full copyright and license information, please read the LICENSE
+* file that was distributed with this source code. For the full list of
+* contributors, visit https://github.com/PHPOffice/PHPWord/contributors.
+*
+* @link        https://github.com/PHPOffice/PHPWord
+* @copyright   2010-2014 PHPWord contributors
+* @license     http://www.gnu.org/licenses/lgpl.txt LGPL version 3
+*/
+
+/*
+ * <w:fldSimple w:instr=" NUMWORDS \# "€ #.##0,00;(€ #.##0,00)" \* Arabic \* MERGEFORMAT ">
+    <w:r>
+    <w:rPr>
+    <w:noProof/>
+    </w:rPr>
+    <w:t>5</w:t>
+    </w:r>
+    </w:fldSimple>
+
+ */
+
+
+namespace PhpOffice\PhpWord\Element;
+
+use PhpOffice\PhpWord\Shared\String;
+
+/**
+ * Field element
+ */
+class Field extends AbstractElement
+{
+    /** @const */
+    
+    //self::$fieldsArray;
+    protected $fieldsArray = array(
+    	'PAGE'=>array(
+    	   'properties'=>array(
+    	       'format' => array('Arabic', 'ArabicDash', 'alphabetic', 'ALPHABETIC', 'roman', 'ROMAN'),
+    	   ),
+    	   'options'=>array() 
+        ),
+        'NUMPAGES'=>array(
+    	   'properties'=>array(
+    	       'format' => array('Arabic', 'ArabicDash', 'alphabetic', 'ALPHABETIC', 'roman', 'ROMAN'),
+    	       'numformat' => array('0', '0,00', '#.##0', '#.##0,00', '€ #.##0,00(€ #.##0,00)', '0%', '0,00%')
+    	   ),
+    	   'options'=>array() 
+        )
+    );
+    
+    /**
+     * Field type
+     *
+     * @var string
+     */
+    protected $type;
+
+    /**
+     * Field properties
+     *
+     * @var array
+     */
+    protected $properties = array();
+
+    /**
+     * Field options
+     *
+     * @var array
+     */
+    protected $options = array();
+
+    /**
+     * Create a new Field Element
+     *
+     * @param string $type
+     * @param mixed $properties
+     * @param mixed $options
+     */
+    public function __construct($type = null, $properties = array(), $options = array())
+    {
+        $this->setType($type);
+        $this->setProperties($properties);
+        $this->setOptions($options);
+    }
+
+    /**
+     * Set Field type
+     *
+     * @param string
+     * @return string
+     */
+    public function setType($type = null)
+    {
+        if (isset($type)) {
+            if (array_key_exists($type, $this->fieldsArray)) {
+                $this->type = $type;
+            } else {
+                throw new \InvalidArgumentException("Invalid type");
+            }
+        }
+        return $this->type;
+    }
+
+    /**
+     * Get Field type
+     *
+     * @return string
+     */
+    public function getType()
+    {
+        return $this->type;
+    }
+
+    /**
+     * Set Field properties
+     *
+     * @param array
+     * @return self
+     */
+    public function setProperties($properties = array())
+    {
+        if (is_array($properties)) {
+//CREATE FUNCTION, WHICH MATCHES SUBARRAY
+            
+            if (array_key_exists($properties, $this->fieldsArray[$this->type])) {
+                $this->properties=array_merge($this->properties, $properties);
+            } else {
+                throw new \InvalidArgumentException("Invalid property");
+            }
+        }
+        return self;
+    }
+
+    /**
+     * Get Field properties
+     *
+     * @return array
+     */
+    public function getProperties()
+    {
+        return $this->properties;
+    }
+
+    /**
+     * Set Field options
+     *
+     * @param array
+     * @return self
+     */
+    public function setOptions($options = array())
+    {
+        if (is_array($options)) {
+            if (array_key_exists($options, self::$fieldsArray[$this->type])) {
+                $this->options=array_merge($this->options, $options);
+            } else {
+                throw new \InvalidArgumentException("Invalid option");
+            }
+        }
+        return self;
+    }
+    
+    /**
+     * Get Field properties
+     *
+     * @return array
+     */
+    public function getOptions()
+    {
+        return $this->options;
+    }
+    
+}