预定义常量

以下常量由本扩展模块定义，因此只有在本扩展模块被编译到 PHP 中，或者在运行时被动态加载后才有效。

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_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 namespaces declarations

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