xslt_set_scheme_handlers(3) [php man page]

XSLT_SET_SCHEME_HANDLERS(3)						 1					       XSLT_SET_SCHEME_HANDLERS(3)

xslt_set_scheme_handlers - Set the scheme handlers for theXSLTprocessor

SYNOPSIS

       void xslt_set_scheme_handlers (resource	$xh, array  $handlers)

DESCRIPTION

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

PARAMETERS

	      o $
		xh -The XSLT processor link identifier, created with xslt_create(3).

	      o $handlers
		- An array with the following keys: "get_all", "open", "get", "put", and "close".  Every entry must be a function name or an array
		in the following format: array($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)

RETURN VALUES

	No value is returned.

EXAMPLES

       Example #1

	      xslt_set_scheme_handlers(3) 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 ($scheme == 'file_exists') {
		      // result is embedded in a small xml string
		      return '<?xml version="1.0" encoding="UTF-8"?><root>' . (file_exists($rest) ? 'true' : 'false') . '</root>';
		  }
	      }

	      $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>

SEE ALSO

       xslt_set_scheme_handler(3).

PHP Documentation Group 											       XSLT_SET_SCHEME_HANDLERS(3)

Check Out this Related Man Page

LIBXML_SET_EXTERNAL_ENTITY_LOADER(3)					 1				      LIBXML_SET_EXTERNAL_ENTITY_LOADER(3)

libxml_set_external_entity_loader - Changes the default external entity loader

SYNOPSIS

       void libxml_set_external_entity_loader (callable  $resolver_function)

DESCRIPTION

	Changes the default external entity loader.

PARAMETERS

	      o $resolver_function
		-  A  callable	that takes three arguments. Two strings, a public id and system id, and a context (an array with four keys) as the
		third argument. This callback should return a resource, a string from which a resource can be opened, or NULL.

RETURN VALUES

	No value is returned.

EXAMPLES

       Example #1

	      libxml_set_external_entity_loader(3) example

	      <?php
	      $xml = <<<XML
	      <!DOCTYPE foo PUBLIC "-//FOO/BAR" "http://example.com/foobar">
	      <foo>bar</foo>
	      XML;

	      $dtd = <<<DTD
	      <!ELEMENT foo (#PCDATA)>
	      DTD;

	      libxml_set_external_entity_loader(
		  function ($public, $system, $context) use($dtd) {
		      var_dump($public);
		      var_dump($system);
		      var_dump($context);
		      $f = fopen("php://temp", "r+");
		      fwrite($f, $dtd);
		      rewind($f);
		      return $f;
		  }
	      );

	      $dd = new DOMDocument;
	      $r  = $dd->loadXML($xml);

	      var_dump($dd->validate());
	      ?>

	      The above example will output:

	      string(10) "-//FOO/BAR"
	      string(25) "http://example.com/foobar"
	      array(4) {
		  ["directory"]    => NULL
		  ["intSubName"]   => NULL
		  ["extSubURI"]    => NULL
		  ["extSubSystem"] => NULL
	      }
	      bool(true)

SEE ALSO

       libxml_disable_entity_loader(3).

PHP Documentation Group 										      LIBXML_SET_EXTERNAL_ENTITY_LOADER(3)

Linux and UNIX Man Pages

xslt_set_scheme_handlers(3) [php man page]

Check Out this Related Man Page