code: function OpenXML_DeleteFile($FullPath, $RelatedTo) {
  
  		// Delete the file in the archive
  		$idx = $this->FileGetIdx($FullPath);
  		if ($idx==false) return false;
  		$this->FileReplace($idx, false);
  
  		// Delete the declaration of the file
  		$this->OpenXML_CTypesDeletePart('/' . $FullPath);
  		 
  		// Delete the relationships
  		$nb = 0;
  		foreach ($RelatedTo as $file) {
  			$target = $this->OpenXML_GetRelativePath($FullPath, $file);
  			$rels_file = $this->OpenXML_Rels_GetPath($file);
  			if ($this->OpenXML_Rels_ReplaceTarget($rels_file, $target, false)) {
  				$nb++;
  			}
  		}
  		
  		return $nb;
  		
  	}
docs: Delete an XML file in the OpenXML archive.
  The file is delete from the declaration file [Content_Types].xml and from the relationships of the specified files.
  @param {string} $FullPath The full path of the file to delete.
  @param {array}  $$RelatedTo List of the the full paths of the files than may have relationship with the file to delete.
  @return {mixed} False if it is not possible to delete the file, or the number of modifier relations ship in case of success (may be 0).