Source of: /manual/en/xml.eventhandlers.php
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<div>
<h1>Event Handlers</h1>
<p class="para">
The XML event handlers defined are:
</p><table class="doctable table">
<caption><b>Supported XML handlers</b></caption>
<thead valign="middle">
<tr valign="middle">
<th>PHP function to set handler</th>
<th>Event description</th>
</tr>
</thead>
<tbody valign="middle" class="tbody">
<tr valign="middle">
<td align="left"><a href="function.xml-set-element-handler.php" class="function">xml_set_element_handler()</a></td>
<td align="left">
Element events are issued whenever the XML parser
encounters start or end tags. There are separate handlers
for start tags and end tags.
</td>
</tr>
<tr valign="middle">
<td align="left">
<a href="function.xml-set-character-data-handler.php" class="function">xml_set_character_data_handler()</a>
</td>
<td align="left">
Character data is roughly all the non-markup contents of
XML documents, including whitespace between tags. Note
that the XML parser does not add or remove any whitespace,
it is up to the application (you) to decide whether
whitespace is significant.
</td>
</tr>
<tr valign="middle">
<td align="left">
<a href="function.xml-set-processing-instruction-handler.php" class="function">xml_set_processing_instruction_handler()</a>
</td>
<td align="left">
PHP programmers should be familiar with processing
instructions (PIs) already. <?php ?> is a processing
instruction, where <span class="replaceable">php</span> is called
the "PI target". The handling of these are
application-specific, except that all PI targets starting
with "XML" are reserved.
</td>
</tr>
<tr valign="middle">
<td align="left"><a href="function.xml-set-default-handler.php" class="function">xml_set_default_handler()</a></td>
<td align="left">
What goes not to another handler goes to the default
handler. You will get things like the XML and document
type declarations in the default handler.
</td>
</tr>
<tr valign="middle">
<td align="left">
<a href="function.xml-set-unparsed-entity-decl-handler.php" class="function">xml_set_unparsed_entity_decl_handler()</a>
</td>
<td align="left">
This handler will be called for declaration of an unparsed
(NDATA) entity.
</td>
</tr>
<tr valign="middle">
<td align="left">
<a href="function.xml-set-notation-decl-handler.php" class="function">xml_set_notation_decl_handler()</a>
</td>
<td align="left">
This handler is called for declaration of a notation.
</td>
</tr>
<tr valign="middle">
<td align="left">
<a href="function.xml-set-external-entity-ref-handler.php" class="function">xml_set_external_entity_ref_handler()</a>
</td>
<td align="left">
This handler is called when the XML parser finds a
reference to an external parsed general entity. This can
be a reference to a file or URL, for example. See <a href="example.xml-external-entity.php" class="link">the external entity
example</a> for a demonstration.
</td>
</tr>
</tbody>
</table>
<p>
</p>
</div>
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