libxml_use_internal_errors
Introduction
XML Manipulation
PHP Manual
qtdom
Introduction
Installing/Configuring
Requirements
Installation
Runtime Configuration
Resource Types
Predefined Constants
qtdom Functions
qdom_error
— Returns the error string from the last QDOM operation or FALSE if no errors occurred
qdom_tree
— Creates a tree of an XML string
libxml_use_internal_errors
Introduction
XML Manipulation
PHP Manual