   #PHP Manual DOM XML functions DomDocument->dump_mem
   DomDocument->get_elements_by_tagname

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                        DomDocument->get_element_by_id

   (no version information, might be only in CVS)
   DomDocument->get_element_by_id --  Searches for an element with a
   certain id

Description

   object DomDocument->get_element_by_id ( string id)

   This function is similar to domdocument_get_elements_by_tagname() but
   searches for an element with a given id. According to the DOM standard
   this requires a DTD which defines the attribute ID to be of type ID,
   though the current implementation simply does an xpath search for
   "//*[@ID = '%s']". This does not comply to the DOM standard which
   requires to return null if it is not known which attribute is of type
   id. This behaviour is likely to be fixed, so do not rely on the
   current behaviour.

   See also domdocument_get_elements_by_tagname()
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