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mihailShumilov · Nov 26, 2014 · 693ce53 · 693ce53
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diff --git a/JSLikeHTMLElement.php b/JSLikeHTMLElement.php
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+<?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 - [email protected]
+ * @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 . ']';
+    }
+}