# libxml

# Introduction

These functions/constants are available as of PHP 5.1.0, and the following core extensions rely on this libxml extension: DOM, libxml, SimpleXML, SOAP, WDDX, XSL, XML, XMLReader, XMLRPC and XMLWriter.

- Installing/Configuring
  - Requirements
  - Installation for PHP versions >= 7.4
  - Installation for PHP versions < 7.4
- Predefined Constants
- LibXMLError — The LibXMLError class
- libxml Functions
  - libxml_clear_errors — Clear libxml error buffer
  - libxml_disable_entity_loader — Disable the ability to load external entities
  - libxml_get_errors — Retrieve array of errors
  - libxml_get_external_entity_loader — Get the current external entity loader
  - libxml_get_last_error — Retrieve last error from libxml
  - libxml_set_external_entity_loader — Changes the default external entity loader
  - libxml_set_streams_context — Set the streams context for the next libxml document load or write
  - libxml_use_internal_errors — Disable libxml errors and allow user to fetch error information as needed

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