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PHP : Function Reference : libxml Functions

libxml Functions


These functions/constants are available since PHP 5.1.0 and if you have compiled one of the extensions based on libxml, like DOM, SimpleXML and XSLT.


This extension requires libxml >= 2.6.0.

Predefined Classes



  • code - the error's code

  • column - the column where the error occurred. Please note that this property isn't entirely implemented in libxml and therefore 0 is often returned.

  • file - the filename, or empty if the XML was loaded from a string

  • level - the severity of the error (one of the following constants: LIBXML_ERR_WARNING, LIBXML_ERR_ERROR or LIBXML_ERR_FATAL)

  • line - the line where the error occurred

  • message - the error message

Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.


Activate small nodes allocation optimization. This may speed up your application without needing to change the code.


Only available in Libxml >= 2.6.21

Default DTD attributes
Load the external subset
Validate with the DTD
Remove blank nodes
Merge CDATA as text nodes

Expand empty tags (e.g. <br/> to <br></br>)


This option is currently just available in the DOMDocument->save() and DOMDocument->saveXML() functions.

LIBXML_NOENT (integer)
Substitute entities
Suppress error reports
LIBXML_NONET (integer)
Disable network access when loading documents
Suppress warning reports

Drop the XML declaration when saving a document


Only available in Libxml >= 2.6.21

Remove redundant namespaces declarations
Implement XInclude substitution
A recoverable error
A fatal error
No errors
A simple warning
libxml version like 20605 or 20617
libxml version like 2.6.5 or 2.6.17

Table of Contents

libxml_clear_errors — Clear libxml error buffer
libxml_get_errors — Retrieve array of errors
libxml_get_last_error — Retrieve last error from libxml
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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