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xslt_set_sax_handler
Description
Sets SAX handlers for parsing of XML on a given Sablotron handle. handler_list is an associative array. Each key of the array must be one of the supported event types from the list below; the value of each array element is either an array containing the names of the start and end handlers for the event, or a string containing the name of the event handler if that event does not support separate handlers for start and end events.
Supported events are:
- document
-
Provide an array containing the names of the handler functions for document start and end events. These handlers will be passed one argument: the Sablotron parser handle on which the event occurred.
- element
-
Provide an array containing the names of the handler functions for element start and end events. The start handler will be passed three arguments: the Sablotron parser handle on which the event occurred, the name of the element encountered, and an associative array containing the element's attributes. The attribute names will be the array keys, and the attribute values will be the array values. The end handler will be passed two arguments: the Sablotron parser handle on which the event occurred, and the name of the element in question.
- namespace
-
Provide an array containing the names of the handler functions for namespace start and end events. The start handler will be passed three arguments: the Sablotron parser handle on which the event occurred, the namespace prefix string, and the URI string. The end handler will be passed two arguments: the Sablotron parser handle on which the event occurred, and the namespace prefix string.
- comment
-
Provide a string containing the name of the handler function for comment events. The handler will be passed two arguments: the Sablotron parser handle on which the event occurred, and the contents of the comment.
- pi
-
Provide a string containing the name of the handler function for processing instruction events. The handler will be passed three arguments: the Sablotron parser handle on which the event occurred, the target, and the contents.
- characters
-
Provide a string containing the name of the handler function for character data events. The handler will be passed two arguments: the Sablotron parser handle on which the event occurred, and the contents of the character data.
Example
Example 1146. Setting up SAX handlers
<?php
error_reporting(E_ALL);
/* Define the handler functions. */
function doc_start($xslt) {
echo "<hr>Document start encountered on parser handle '$xslt'\n";
}
function doc_end($xslt) {
echo "<hr>Document end encountered on parser handle '$xslt'\n";
}
function element_start($xslt_handle, $element, $attributes) {
echo "<hr>Got element '$element'. ";
if (count($attributes)) {
echo "Attributes:\n";
print_r($attributes);
} else {
echo "No attributes.";
}
}
function cdata($xslt_handle, $contents) {
echo "Got character data '$contents'\n";
}
/* Create the array of events => handler names. */
$sax_handlers = array('document' => array('doc_start', 'doc_end'),
'element' => array('element_start'),
'characters' => 'cdata');
/* Create the parser and set the handlers on it. */
$xslt = xslt_create();
xslt_set_sax_handler($xslt, $sax_handlers);
/* Run the parser and display the results if successful. */
$result_URI = 'arg:/my_buffer';
if (!xslt_run($xslt, 'slashdot.xsl', 'slashdot.xml', $result_URI)) {
echo "<pre>xslt_run() failed:" . xslt_error() . "\n";
} else {
echo xslt_fetch_result($xslt, $result_URI);
}
xslt_free($xslt);
?>