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Home » API reference » Content Injector (formerly AdSense Injector) 7.3 » adsense_injector.module

function _ai_injectXPath in Content Injector (formerly AdSense Injector) 7.3

Same name and namespace in other branches
  1. 6.3 adsense_injector.module \_ai_injectXPath()

Inject an HTML fragment into the node body, using XPath expression.

@todo Fix entity encoding problem! http://www.php.net/manual/en/domdocument.loadhtml.php#95251 http://devzone.zend.com/article/8855

Parameters

$body The node body to operate on.:

$fragment The HTML fragment to inject.:

$xpath_expression The XPath expression to use:

$encoding The character encoding to use. Defaults to 'UTF-8'.:

1 call to _ai_injectXPath()
adsense_injector_process_body in ./adsense_injector.module
Process the body, handle adsense injector tags. Look for an insertion point based on paragraphs.

File

./adsense_injector.module, line 257
Inject adsense ads into node content automatically.

Code

function _ai_injectXPath($body, $fragment, $xpath_expression, $encoding = 'UTF-8') {
  try {
    $doc = new DomDocument();

    // HACK: Fix entity encoding http://www.php.net/manual/en/domdocument.loadhtml.php#95251 et al.
    $encoding_string = "<meta http-equiv=\"Content-Type\" content=\"text/html; charset={$encoding}\">";
    $prehtml = "<html><head>{$encoding_string}</head><body>";
    $posthtml = "</body></html>";
    @$doc
      ->loadHTML($prehtml . $body . $posthtml);
    $xpath = new DOMXpath($doc);
    $ent = $xpath
      ->query($xpath_expression);
    if (!empty($ent) && $ent->length > 0) {

      // http://stackoverflow.com/questions/2255158/how-do-i-insert-html-into-a-php-dom-object
      $frag = $doc
        ->createDocumentFragment();
      $frag
        ->appendXML($fragment);
      $ent
        ->item(0)
        ->appendChild($frag);

      // DOMDocument->saveHTML() doesn't accept a child element unless in PHP
      // 5.3.6 or above.  So we'll have to do this the ugly way (as described
      // in http://php.net/manual/en/domdocument.savehtml.php#85165
      // $html_fragment = $doc->saveHTML($doc->getElementsByTagName('body')->item(0));
      //
      // If needed, we can do a manual encoding fixup
      // $doc = _ai_fixup_html_encoding($doc);
      $html_fragment = preg_replace('/^<!DOCTYPE.+?>/', '', str_replace(array(
        $encoding_string,
        '<html>',
        '</html>',
        '<head>',
        '</head>',
        '<body>',
        '</body>',
      ), '', $doc
        ->saveHTML()));
    }
    else {
      $html_fragment = $body . _ai_html_comment('injectXPath', "XPath query '{$xpath_expression}' result empty; insertion skipped ");
    }
  } catch (Exception $e) {
    $html_fragment = $body . _ai_html_comment('injectXPath error', $e
      ->getMessage());
  }
  return $html_fragment;
}