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.

LIBXML_BIGLINES (integer)
Allows line numbers greater than 65535 to be reported correctly.

Note:

Only available as of PHP 7.0.0 with Libxml >= 2.9.0

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

Note:

Only available in Libxml >= 2.6.21

LIBXML_DTDATTR (integer)
Default DTD attributes
LIBXML_DTDLOAD (integer)
Load the external subset
LIBXML_DTDVALID (integer)
Validate with the DTD
LIBXML_HTML_NOIMPLIED (integer)
Sets HTML_PARSE_NOIMPLIED flag, which turns off the automatic adding of implied html/body... elements.

Note:

Only available in Libxml >= 2.7.7 (as of PHP >= 5.4.0)

LIBXML_HTML_NODEFDTD (integer)
Sets HTML_PARSE_NODEFDTD flag, which prevents a default doctype being added when one is not found.

Note:

Only available in Libxml >= 2.7.8 (as of PHP >= 5.4.0)

LIBXML_NOBLANKS (integer)
Remove blank nodes
LIBXML_NOCDATA (integer)
Merge CDATA as text nodes
LIBXML_NOEMPTYTAG (integer)
Expand empty tags (e.g. <br/> to <br></br>)

Note:

This option is currently just available in the DOMDocument::save and DOMDocument::saveXML functions.

LIBXML_NOENT (integer)
Substitute entities
LIBXML_NOERROR (integer)
Suppress error reports
LIBXML_NONET (integer)
Disable network access when loading documents
LIBXML_NOWARNING (integer)
Suppress warning reports
LIBXML_NOXMLDECL (integer)
Drop the XML declaration when saving a document

Note:

Only available in Libxml >= 2.6.21

LIBXML_NSCLEAN (integer)
Remove redundant namespace declarations
LIBXML_PARSEHUGE (integer)
Sets XML_PARSE_HUGE flag, which relaxes any hardcoded limit from the parser. This affects limits like maximum depth of a document or the entity recursion, as well as limits of the size of text nodes.

Note:

Only available in Libxml >= 2.7.0 (as of PHP >= 5.3.2 and PHP >= 5.2.12)

LIBXML_PEDANTIC (integer)
Sets XML_PARSE_PEDANTIC flag, which enables pedantic error reporting.

Note:

Available as of PHP >= 5.4.0

LIBXML_XINCLUDE (integer)
Implement XInclude substitution
LIBXML_ERR_ERROR (integer)
A recoverable error
LIBXML_ERR_FATAL (integer)
A fatal error
LIBXML_ERR_NONE (integer)
No errors
LIBXML_ERR_WARNING (integer)
A simple warning
LIBXML_VERSION (integer)
libxml version like 20605 or 20617
LIBXML_DOTTED_VERSION (string)
libxml version like 2.6.5 or 2.6.17
LIBXML_SCHEMA_CREATE (integer)
Create default/fixed value nodes during XSD schema validation

Note:

Only available in Libxml >= 2.6.14 (as of PHP >= 5.5.2)