Source of: /manual/en/libxml.constants.php
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<div>
<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 class="varlistentry">
<span class="term">
<b><tt class="constant">LIBXML_COMPACT</tt></b>
(<a href="language.types.integer.php" class="type integer">integer</a>)
</span>
</dt><dd class="listitem">
<span class="simpara">
Activate small nodes allocation optimization. This may speed up your
application without needing to change the code.
</span>
<blockquote><p><b class="note">Note</b>:
Only available in Libxml >= 2.6.21
<br />
</p></blockquote>
</dd>
<dt class="varlistentry">
<span class="term">
<b><tt class="constant">LIBXML_DTDATTR</tt></b>
(<a href="language.types.integer.php" class="type integer">integer</a>)
</span>
</dt><dd class="listitem">
<span class="simpara">
Default DTD attributes
</span>
</dd>
<dt class="varlistentry">
<span class="term">
<b><tt class="constant">LIBXML_DTDLOAD</tt></b>
(<a href="language.types.integer.php" class="type integer">integer</a>)
</span>
</dt><dd class="listitem">
<span class="simpara">
Load the external subset
</span>
</dd>
<dt class="varlistentry">
<span class="term">
<b><tt class="constant">LIBXML_DTDVALID</tt></b>
(<a href="language.types.integer.php" class="type integer">integer</a>)
</span>
</dt><dd class="listitem">
<span class="simpara">
Validate with the DTD
</span>
</dd>
<dt class="varlistentry">
<span class="term">
<b><tt class="constant">LIBXML_NOBLANKS</tt></b>
(<a href="language.types.integer.php" class="type integer">integer</a>)
</span>
</dt><dd class="listitem">
<span class="simpara">
Remove blank nodes
</span>
</dd>
<dt class="varlistentry">
<span class="term">
<b><tt class="constant">LIBXML_NOCDATA</tt></b>
(<a href="language.types.integer.php" class="type integer">integer</a>)
</span>
</dt><dd class="listitem">
<span class="simpara">
Merge CDATA as text nodes
</span>
</dd>
<dt class="varlistentry">
<span class="term">
<b><tt class="constant">LIBXML_NOEMPTYTAG</tt></b>
(<a href="language.types.integer.php" class="type integer">integer</a>)
</span>
</dt><dd class="listitem">
<span class="simpara">
Expand empty tags (e.g. <i><br/></i> to
<i><br></br></i>)
</span>
<blockquote><p><b class="note">Note</b>:
This option is currently just available in the
<a href="domdocument.save.php" class="xref">DOMDocument::save</a> and
<a href="domdocument.savexml.php" class="xref">DOMDocument::saveXML</a> functions.
<br />
</p></blockquote>
</dd>
<dt class="varlistentry">
<span class="term">
<b><tt class="constant">LIBXML_NOENT</tt></b>
(<a href="language.types.integer.php" class="type integer">integer</a>)
</span>
</dt><dd class="listitem">
<span class="simpara">
Substitute entities
</span>
</dd>
<dt class="varlistentry">
<span class="term">
<b><tt class="constant">LIBXML_NOERROR</tt></b>
(<a href="language.types.integer.php" class="type integer">integer</a>)
</span>
</dt><dd class="listitem">
<span class="simpara">
Suppress error reports
</span>
</dd>
<dt class="varlistentry">
<span class="term">
<b><tt class="constant">LIBXML_NONET</tt></b>
(<a href="language.types.integer.php" class="type integer">integer</a>)
</span>
</dt><dd class="listitem">
<span class="simpara">
Disable network access when loading documents
</span>
</dd>
<dt class="varlistentry">
<span class="term">
<b><tt class="constant">LIBXML_NOWARNING</tt></b>
(<a href="language.types.integer.php" class="type integer">integer</a>)
</span>
</dt><dd class="listitem">
<span class="simpara">
Suppress warning reports
</span>
</dd>
<dt class="varlistentry">
<span class="term">
<b><tt class="constant">LIBXML_NOXMLDECL</tt></b>
(<a href="language.types.integer.php" class="type integer">integer</a>)
</span>
</dt><dd class="listitem">
<span class="simpara">
Drop the XML declaration when saving a document
</span>
<blockquote><p><b class="note">Note</b>:
Only available in Libxml >= 2.6.21
<br />
</p></blockquote>
</dd>
<dt class="varlistentry">
<span class="term">
<b><tt class="constant">LIBXML_NSCLEAN</tt></b>
(<a href="language.types.integer.php" class="type integer">integer</a>)
</span>
</dt><dd class="listitem">
<span class="simpara">
Remove redundant namespaces declarations
</span>
</dd>
<dt class="varlistentry">
<span class="term">
<b><tt class="constant">LIBXML_XINCLUDE</tt></b>
(<a href="language.types.integer.php" class="type integer">integer</a>)
</span>
</dt><dd class="listitem">
<span class="simpara">
Implement XInclude substitution
</span>
</dd>
<dt class="varlistentry">
<span class="term">
<b><tt class="constant">LIBXML_ERR_ERROR</tt></b>
(<a href="language.types.integer.php" class="type integer">integer</a>)
</span>
</dt><dd class="listitem">
<span class="simpara">
A recoverable error
</span>
</dd>
<dt class="varlistentry">
<span class="term">
<b><tt class="constant">LIBXML_ERR_FATAL</tt></b>
(<a href="language.types.integer.php" class="type integer">integer</a>)
</span>
</dt><dd class="listitem">
<span class="simpara">
A fatal error
</span>
</dd>
<dt class="varlistentry">
<span class="term">
<b><tt class="constant">LIBXML_ERR_NONE</tt></b>
(<a href="language.types.integer.php" class="type integer">integer</a>)
</span>
</dt><dd class="listitem">
<span class="simpara">
No errors
</span>
</dd>
<dt class="varlistentry">
<span class="term">
<b><tt class="constant">LIBXML_ERR_WARNING</tt></b>
(<a href="language.types.integer.php" class="type integer">integer</a>)
</span>
</dt><dd class="listitem">
<span class="simpara">
A simple warning
</span>
</dd>
<dt class="varlistentry">
<span class="term">
<b><tt class="constant">LIBXML_VERSION</tt></b>
(<a href="language.types.integer.php" class="type integer">integer</a>)
</span>
</dt><dd class="listitem">
<span class="simpara">
libxml version like 20605 or 20617
</span>
</dd>
<dt class="varlistentry">
<span class="term">
<b><tt class="constant">LIBXML_DOTTED_VERSION</tt></b>
(<a href="language.types.string.php" class="type string">string</a>)
</span>
</dt><dd class="listitem">
<span class="simpara">
libxml version like 2.6.5 or 2.6.17
</span>
</dd>
</dl>
</div>
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