<?php /** * JavaScript-like HTML DOM Element * * This class extends PHP's DOMElement to allow * users to get and set the innerHTML property of * HTML elements in the same way it's done in * JavaScript. * * Example usage: * @code * require_once 'JSLikeHTMLElement.php'; * header('Content-Type: text/plain'); * $doc = new DOMDocument(); * $doc->registerNodeClass('DOMElement', 'JSLikeHTMLElement'); * $doc->loadHTML('<div><p>Para 1</p><p>Para 2</p></div>'); * $elem = $doc->getElementsByTagName('div')->item(0); * * // print innerHTML * echo $elem->innerHTML; // prints '<p>Para 1</p><p>Para 2</p>' * echo "\n\n"; * * // set innerHTML * $elem->innerHTML = '<a href="http://fivefilters.org">FiveFilters.org</a>'; * echo $elem->innerHTML; // prints '<a href="http://fivefilters.org">FiveFilters.org</a>' * echo "\n\n"; * * // print document (with our changes) * echo $doc->saveXML(); * @endcode * * @author Keyvan Minoukadeh - http://www.keyvan.net - keyvan@keyvan.net * @see http://fivefilters.org (the project this was written for) */ class JSLikeHTMLElement extends DOMElement { /** * Used for setting innerHTML like it's done in JavaScript: * @code * $div->innerHTML = '<h2>Chapter 2</h2><p>The story begins...</p>'; * @endcode */ public function __set($name, $value) { if ($name == 'innerHTML') { // first, empty the element for ($x=$this->childNodes->length-1; $x>=0; $x--) { $this->removeChild($this->childNodes->item($x)); } // $value holds our new inner HTML if ($value != '') { $f = $this->ownerDocument->createDocumentFragment(); // appendXML() expects well-formed markup (XHTML) $result = @$f->appendXML($value); // @ to suppress PHP warnings if ($result) { if ($f->hasChildNodes()) $this->appendChild($f); } else { // $value is probably ill-formed $f = new DOMDocument(); $value = mb_convert_encoding($value, 'HTML-ENTITIES', 'UTF-8'); // Using <htmlfragment> will generate a warning, but so will bad HTML // (and by this point, bad HTML is what we've got). // We use it (and suppress the warning) because an HTML fragment will // be wrapped around <html><body> tags which we don't really want to keep. // Note: despite the warning, if loadHTML succeeds it will return true. $result = @$f->loadHTML('<htmlfragment>'.$value.'</htmlfragment>'); if ($result) { $import = $f->getElementsByTagName('htmlfragment')->item(0); foreach ($import->childNodes as $child) { $importedNode = $this->ownerDocument->importNode($child, true); $this->appendChild($importedNode); } } else { // oh well, we tried, we really did. :( // this element is now empty } } } } else { $trace = debug_backtrace(); trigger_error('Undefined property via __set(): '.$name.' in '.$trace[0]['file'].' on line '.$trace[0]['line'], E_USER_NOTICE); } } /** * Used for getting innerHTML like it's done in JavaScript: * @code * $string = $div->innerHTML; * @endcode */ public function __get($name) { if ($name == 'innerHTML') { $inner = ''; foreach ($this->childNodes as $child) { $inner .= $this->ownerDocument->saveXML($child); } return $inner; } $trace = debug_backtrace(); trigger_error('Undefined property via __get(): '.$name.' in '.$trace[0]['file'].' on line '.$trace[0]['line'], E_USER_NOTICE); return null; } public function __toString() { return '['.$this->tagName.']'; } }