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