Function.xslt-set-scheme-handlers

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xslt_set_scheme_handlers — Set the scheme handlers for the XSLT processor

Beschreibung

void xslt_set_scheme_handlers ( resource $xh , array $handlers )

Registers the scheme handlers (XPath handlers) for the document.

Parameter-Liste

xh

• The XSLT processor link identifier, created with xslt_create().

handlers

• An array with the following keys: "get_all", "open", "get", "put", and "close". Every entry must be a function name or an array in the following format: array($obj, "method"). Note that the given array does not need to contain all of the different scheme handler elements (although it can), but it only needs to conform to the "handler" => "function" format described above. Each of the individual scheme handler functions called are in the formats below: string get_all(resource processor, string scheme, string rest) resource open(resource processor, string scheme, string rest) int get(resource processor, resource fp, string &data) int put(resource processor, resource fp, string data) void close(resource processor, resource fp)

Rückgabewerte

Es wird kein Wert zurückgegeben.

Beispiele

Beispiel #1 xslt_set_scheme_handlers() example

     For example, here is an implementation of the "file_exists()" PHP function.

<?php
 
// Definition of the handler
function mySchemeHandler($processor, $scheme, $rest)
{
    $rest = substr($rest,1);    // to remove the first / automatically added by the engine
    if ($scheme == 'file_exists') {
        // result is embedded in a small xml string
        return '' . (file_exists($rest) ? 'true' : 'false') . '';
    }
}
 
$SchemeHandlerArray = array('get_all' => 'mySchemeHandler');
 
// Start the engine
$params = array();
$xh = xslt_create();
 
xslt_set_scheme_handlers($xh, $SchemeHandlerArray);
 
$result = xslt_process($xh, "myFile.xml", "myFile.xsl", NULL, array(), $params);
xslt_free($xh);
 
echo $result;
 
?>

     Then, inside the stylesheet, you can test whether a certain file exists with:

<xsl:if test="document('file_exists:anotherXMLfile.xml')/root='true'">

<!-- The file exist -->

</xsl:if>

Siehe auch

• xslt_set_scheme_handler()