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<h1>Predefined Constants</h1>
<p class="simpara">
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.
</p>
<dl>
<dt id="constant.libxml-compact">
<span class="term">
<strong><code>LIBXML_COMPACT</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</span>
<dd>
<span class="simpara">
Activate small nodes allocation optimization. This may speed up your
application without needing to change the code.
</span>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
Only available in Libxml >= 2.6.21
</p>
</p></blockquote>
</dd>
</dt>
<dt id="constant.libxml-dtdattr">
<span class="term">
<strong><code>LIBXML_DTDATTR</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</span>
<dd>
<span class="simpara">
Default DTD attributes
</span>
</dd>
</dt>
<dt id="constant.libxml-dtdload">
<span class="term">
<strong><code>LIBXML_DTDLOAD</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</span>
<dd>
<span class="simpara">
Load the external subset
</span>
</dd>
</dt>
<dt id="constant.libxml-dtdvalid">
<span class="term">
<strong><code>LIBXML_DTDVALID</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</span>
<dd>
<span class="simpara">
Validate with the DTD
</span>
</dd>
</dt>
<dt id="constant.libxml-noblanks">
<span class="term">
<strong><code>LIBXML_NOBLANKS</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</span>
<dd>
<span class="simpara">
Remove blank nodes
</span>
</dd>
</dt>
<dt id="constant.libxml-nocdata">
<span class="term">
<strong><code>LIBXML_NOCDATA</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</span>
<dd>
<span class="simpara">
Merge CDATA as text nodes
</span>
</dd>
</dt>
<dt id="constant.libxml-noemptytag">
<span class="term">
<strong><code>LIBXML_NOEMPTYTAG</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</span>
<dd>
<span class="simpara">
Expand empty tags (e.g. <em><br/></em> to
<em><br></br></em>)
</span>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
This option is currently just available in the
<a href="domdocument.save.html" class="xref">DOMDocument::save</a> and
<a href="domdocument.savexml.html" class="xref">DOMDocument::saveXML</a> functions.
</p>
</p></blockquote>
</dd>
</dt>
<dt id="constant.libxml-noent">
<span class="term">
<strong><code>LIBXML_NOENT</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</span>
<dd>
<span class="simpara">
Substitute entities
</span>
</dd>
</dt>
<dt id="constant.libxml-noerror">
<span class="term">
<strong><code>LIBXML_NOERROR</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</span>
<dd>
<span class="simpara">
Suppress error reports
</span>
</dd>
</dt>
<dt id="constant.libxml-nonet">
<span class="term">
<strong><code>LIBXML_NONET</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</span>
<dd>
<span class="simpara">
Disable network access when loading documents
</span>
</dd>
</dt>
<dt id="constant.libxml-nowarning">
<span class="term">
<strong><code>LIBXML_NOWARNING</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</span>
<dd>
<span class="simpara">
Suppress warning reports
</span>
</dd>
</dt>
<dt id="constant.libxml-noxmldecl">
<span class="term">
<strong><code>LIBXML_NOXMLDECL</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</span>
<dd>
<span class="simpara">
Drop the XML declaration when saving a document
</span>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
Only available in Libxml >= 2.6.21
</p>
</p></blockquote>
</dd>
</dt>
<dt id="constant.libxml-nsclean">
<span class="term">
<strong><code>LIBXML_NSCLEAN</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</span>
<dd>
<span class="simpara">
Remove redundant namespaces declarations
</span>
</dd>
</dt>
<dt id="constant.libxml-parsehuge">
<span class="term">
<strong><code>LIBXML_PARSEHUGE</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</span>
<dd>
<span class="simpara">
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.
</span>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
Only available in Libxml >= 2.7.0 (as of PHP >= 5.3.2 and PHP >= 5.2.12)
</p>
</p></blockquote>
</dd>
</dt>
<dt id="constant.libxml-xinclude">
<span class="term">
<strong><code>LIBXML_XINCLUDE</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</span>
<dd>
<span class="simpara">
Implement XInclude substitution
</span>
</dd>
</dt>
<dt id="constant.libxml-err-error">
<span class="term">
<strong><code>LIBXML_ERR_ERROR</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</span>
<dd>
<span class="simpara">
A recoverable error
</span>
</dd>
</dt>
<dt id="constant.libxml-err-fatal">
<span class="term">
<strong><code>LIBXML_ERR_FATAL</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</span>
<dd>
<span class="simpara">
A fatal error
</span>
</dd>
</dt>
<dt id="constant.libxml-err-none">
<span class="term">
<strong><code>LIBXML_ERR_NONE</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</span>
<dd>
<span class="simpara">
No errors
</span>
</dd>
</dt>
<dt id="constant.libxml-err-warning">
<span class="term">
<strong><code>LIBXML_ERR_WARNING</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</span>
<dd>
<span class="simpara">
A simple warning
</span>
</dd>
</dt>
<dt id="constant.libxml-version">
<span class="term">
<strong><code>LIBXML_VERSION</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</span>
<dd>
<span class="simpara">
libxml version like 20605 or 20617
</span>
</dd>
</dt>
<dt id="constant.libxml-dotted-version">
<span class="term">
<strong><code>LIBXML_DOTTED_VERSION</code></strong>
(<span class="type"><a href="language.types.string.html" class="type string">string</a></span>)
</span>
<dd>
<span class="simpara">
libxml version like 2.6.5 or 2.6.17
</span>
</dd>
</dt>
<dt id="constant.libxml-schema-create">
<span class="term">
<strong><code>LIBXML_SCHEMA_CREATE</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</span>
<dd>
<span class="simpara">
Create default/fixed value nodes during XSD schema validation
</span>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
Only available in Libxml >= 2.6.14 (as of PHP >= 5.5.2)
</p>
</p></blockquote>
</dd>
</dt>
</dl>
</div>
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