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AliceWonderMiscreations/html5domdoc.class.php

Created January 10, 2018 13:05
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php class for generating html5 content as XML with DOMDocument
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html5domdoc.class.php
<?php
/*
+-----------------------------------------------------------------------+
| |
| Copyright (c) 2012-2018 Alice Wonder Miscreations |
| May be used under terms of MIT license |
| |
+-----------------------------------------------------------------------+
| Purpose: HTML5 as XML page generation |
+-----------------------------------------------------------------------+
*/
class html5domdoc {
protected $dom;
public $xmlHtml;
public $xmlHead;
public $xmlBody;
protected $rtalabel = FALSE;
protected $keywords = array();
protected $description = '';
protected $cspstring = '';
protected $objectwhitelist = array('text/plain', 'text/html', 'image/webp', 'application/pdf', 'application/xhtml+xml');
protected $xmlns = 'http://www.w3.org/1999/xhtml';
protected $xmlLang = 'en';
public $expires = 0;
/* any function that uses head / body should call this */
protected function domNodes() {
$this->xmlHtml = $this->dom->getElementsByTagName('html')->item(0);
$this->xmlHead = $this->dom->getElementsByTagName('head')->item(0);
$this->xmlBody = $this->dom->getElementsByTagName('body')->item(0);
}
/* Puts head elements in logical order, called by sendPage */
protected function adjustHead() {
$metaEquiv = array();
$metaName = array();
$metaProperty = array();
$links = array();
$scripts = array();
$misc = array();
$newHead = $this->dom->createElement('head');
$children = $this->xmlHead->childNodes;
foreach ($children as $child) {
$newChild = $child->cloneNode(true);
$tag = $newChild->tagName;
switch ($tag) {
case 'meta' :
if ($newChild->hasAttribute('http-equiv')) {
$equiv = $newChild->getAttribute('http-equiv');
if (strcmp($equiv, 'X-Content-Security-Policy') === 0) {
$newHead->appendChild($newChild);
} else {
$metaEquiv[] = $newChild;
}
} elseif($newChild->hasAttribute('name')) {
$metaName[] = $newChild;
} else {
$metaProperty[] = $newChild;
}
break;
case 'link' :
$links[] = $newChild;
break;
case 'script' :
$scripts[] = $newChild;
break;
case 'title' :
$newTitle = $newChild;
break;
default :
$misc[] = $newChild;
break;
}
}
$j = count($metaEquiv);
for ($i=0; $i<$j; $i++) {
$newHead->appendChild($metaEquiv[$i]);
}
$meta = $this->dom->createElement('meta');
$meta->setAttribute('charset', 'UTF-8');
$newHead->appendChild($meta);
if ($this->rtalabel) {
$meta = $this->dom->createElement('meta');
$meta->setAttribute('name', 'RATING');
$meta->setAttribute('content', 'RTA-5042-1996-1400-1577-RTA');
$newHead->appendChild($meta);
}
$j = count($this->keywords);
if ($j > 0) {
$content = implode(',', array_unique($this->keywords));
$meta = $this->dom->createElement('meta');
$meta->setAttribute('name', 'keywords');
$meta->setAttribute('content', $content);
$newHead->appendChild($meta);
}
if (strlen($this->description) > 0) {
$meta = $this->dom->createElement('meta');
$meta->setAttribute('name', 'description');
$meta->setAttribute('content', $this->description);
$newHead->appendChild($meta);
}
$genstring = 'PHP ' . phpversion() . ' DOMDocument/libxml2 ' . LIBXML_DOTTED_VERSION;
$meta = $this->dom->createElement('meta');
$meta->setAttribute('name', 'generator');
$meta->setAttribute('content', $genstring);
$newHead->appendChild($meta);
$j = count($metaName);
for ($i=0; $i<$j; $i++) {
$newHead->appendChild($metaName[$i]);
}
$j = count($metaProperty);
for ($i=0; $i<$j; $i++) {
$newHead->appendChild($metaProperty[$i]);
}
$j = count($links);
for ($i=0; $i<$j; $i++) {
//preload first
$rel = $links[$i]->getAttribute('rel');
if($rel == "preload") {
$newHead->appendChild($links[$i]);
}
}
for ($i=0; $i<$j; $i++) {
//stylesheet second
$rel = $links[$i]->getAttribute('rel');
if($rel == "stylesheet") {
$newHead->appendChild($links[$i]);
}
}
for ($i=0; $i<$j; $i++) {
//icon third
$rel = $links[$i]->getAttribute('rel');
if($rel == "icon") {
$newHead->appendChild($links[$i]);
}
}
for ($i=0; $i<$j; $i++) {
//shortcut icon fourth
$rel = $links[$i]->getAttribute('rel');
if($rel == "shortcut icon") {
$newHead->appendChild($links[$i]);
}
}
for ($i=0; $i<$j; $i++) {
//manifest fifth
$rel = $links[$i]->getAttribute('rel');
if($rel == "manifest") {
$newHead->appendChild($links[$i]);
}
}
for ($i=0; $i<$j; $i++) {
//prefetch last
$rel = $links[$i]->getAttribute('rel');
if($rel == "prefetch") {
$newHead->appendChild($links[$i]);
}
}
for ($i=0; $i<$j; $i++) {
//canonical last
$rel = $links[$i]->getAttribute('rel');
if($rel == "canonical") {
$newHead->appendChild($links[$i]);
}
}
$j = count($scripts);
for ($i=0; $i<$j; $i++) {
$newHead->appendChild($scripts[$i]);
}
$j = count($misc);
for ($i=0; $i<$j; $i++) {
$newHead->appendChild($misc[$i]);
}
if (! isset($newTitle)) {
$newTitle = $this->dom->createElement('title', 'Page Title');
}
$newHead->appendChild($newTitle);
$this->xmlHead->parentNode->replaceChild($newHead, $this->xmlHead);
}
protected function sanitizeBody() {
$nodelist = $this->xmlBody->getElementsByTagName('script');
$n = $nodelist->length;
for($j = $n; --$j >= 0;) {
$nodelist->item($j)->parentNode->removeChild($nodelist->item($j));
}
$nodelist = $this->xmlBody->getElementsByTagName('embed');
$n = $nodelist->length;
for($j = $n; --$j >= 0;) {
$nodelist->item($j)->parentNode->removeChild($nodelist->item($j));
}
$nodelist = $this->xmlBody->getElementsByTagName('applet');
$n = $nodelist->length;
for($j = $n; --$j >= 0;) {
$nodelist->item($j)->parentNode->removeChild($nodelist->item($j));
}
$nodelist = $this->xmlBody->getElementsByTagName('object');
$n = $nodelist->length;
for($j = $n; --$j >= 0;) {
$node = $nodelist->item($j);
$type = 'null';
if($node->hasAttribute('type')) {
$type = strtolower(trim($node->getAttribute('type')));
}
if(in_array($type, $this->objectwhitelist)) {
$node->setAttribute('typemustmatch', 'typemustmatch');
} else {
$node->parentNode->removeChild($node);
}
}
}
protected function sanitizeTargetLinks() {
$nodelist = $this->xmlBody->getElementsByTagName('a');
$n = $nodelist->length;
for($j = $n; --$j >= 0;) {
$node = $nodelist->item($j);
if($node->hasAttribute('target')) {
$target = trim(strtolower($node->getAttribute('target')));
if($target == "_blank") {
if($node->hasAttribute('rel')) {
$relString = preg_replace('/\s+/', ' ', trim(strtolower($node->getAttribute('rel'))));
$relTags = explode(' ', $relString);
} else {
$relTags = array();
}
if(! in_array('noopener', $relTags)) {
$relTags[] = 'noopener';
}
if(! in_array('noreferrer', $relTags)) {
$href = strtolower($node->getAttribute('href'));
$count = substr_count($href, 'dreamstime');
if($count > 0) {
$relTags[] = 'noreferrer';
}
}
$relString = implode(' ', $relTags);
$node->setAttribute('rel', $relString);
if(! $node->hasAttribute('title')) {
if($node->hasAttribute('href')) {
$href = trim($node->getAttribute('href'));
$tmp = preg_replace('/:\/\//', '', $href);
if(strlen($tmp) < strlen($href)) {
$node->setAttribute('title', '[Opens new window, external link]');
} else {
$node->setAttribute('title', '[Opens new window]');
}
}
}
}
}
}
}
protected function fixArticleLandmarks() {
$articlelist = $this->xmlBody->getElementsByTagName('article');
$nn = $articlelist->length;
$x = new DOMXPath($this->dom);
for($ii = 0; $ii < $nn; $ii++) {
$arnode = $articlelist->item($ii);
$nodelist = $arnode->getElementsByTagName('aside');
$n = $nodelist->length;
for($i = 0; $i < $n; $i++) {
$aside = $nodelist->item($i);
if(! $aside->hasAttribute('role')) {
$aside->setAttribute('role', 'region');
if(! $aside->hasAttribute('aria-labelledby')) {
if(! $aside->hasAttribute('aria-label')) {
$count = 0;
foreach($aside->childNodes as $child) {
if(!($child instanceof \DomText)) {
$count++;
}
}
if($count != 0) {
$first = $x->query('*', $aside)->item(0);
$tagname = $first->tagName;
if(in_array($tagname, array ('h2', 'h3', 'h4', 'h5', 'h6'))) {
$labelid = "aside: " . trim($first->textContent);
$aside->setAttribute('aria-label', $labelid);
}
}
}
}
}
} // end for $i loop
$hastoc = false;
$nodelist = $arnode->getElementsByTagName('details');
$n = $nodelist->length;
for($i = 0; $i < $n; $i++) {
$details = $nodelist->item($i);
if($details->hasAttribute('class')) {
$class = $details->getAttribute('class');
if(strcmp($class, 'toc') == 0) {
$details->setAttribute('role', 'navigation');
$hastoc = true;
if(! $details->hasAttribute('aria-labelledby')) {
if(! $details->hasAttribute('aria-label')) {
$details->setAttribute('aria-label', 'Table of Contents');
}
}
}
}
} // end of for $i loop
$nodelist = $arnode->getElementsByTagName('section');
$n = $nodelist->length;
for($i = 0; $i < $n; $i++) {
$section = $nodelist->item($i);
if(! $section->hasAttribute('role')) {
if(! $hastoc) {
$section->setAttribute('role', 'region');
}
if(! $section->hasAttribute('aria-labelledby')) {
if(! $section->hasAttribute('aria-label')) {
$count = 0;
foreach($section->childNodes as $child) {
if(!($section instanceof \DomText)) {
$count++;
}
}
if($count != 0) {
$first = $x->query('*', $section)->item(0);
$tagname = $first->tagName;
if($tagname == 'h2') {
$labelid = "section: " . trim($first->textContent);
$section->setAttribute('aria-label', $labelid);
}
elseif(in_array($tagname, array ('h3', 'h4', 'h5', 'h6'))) {
$labelid = "subsection: " . trim($first->textContent);
$section->setAttribute('aria-label', $labelid);
}
}
}
}
}
} // end for $i loop
} // end for for $ii loop
// fix header, main. footer
$header = $this->dom->getElementsByTagName('header')->item(0);
if(! is_null($header)) {
if(! $header->hasAttribute('role')) {
$header->setAttribute('role', 'banner');
}
}
$main = $this->dom->getElementsByTagName('main')->item(0);
if(! is_null($main)) {
if(! $main->hasAttribute('role')) {
$main->setAttribute('role', 'main');
}
}
$footer = $this->dom->getElementsByTagName('footer')->item(0);
if(! is_null($footer)) {
if(! $footer->hasAttribute('role')) {
$footer->setAttribute('role', 'contentinfo');
}
}
$navlist = $this->dom->getElementsByTagName('nav');
$j = $navlist->length;
for($i = 0; $i < $j; $i++) {
$nav = $navlist->item($i);
if(! $nav->hasAttribute('role')) {
$nav->setAttribute('role', 'navigation');
}
}
} // end of function
//sends the headers, called by sendPage
protected function sendHeader($HTML, $status="") {
$tstamp = time();
$expires = $tstamp + $this->expires;
if($status == "200") {
header("HTTP/1.1 200 OK");
}
if(strlen($this->cspstring) > 0) {
header('Content-Security-Policy: ' . $this->cspstring);
}
if($this->rtalabel) {
header('Rating: RTA-5042-1996-1400-1577-RTA');
}
if($HTML) {
header('Content-Type: text/html; charset=utf-8');
} else {
header('Content-Type: application/xhtml+xml; charset=utf-8');
}
date_default_timezone_set('UTC');
header('Last-Modified: ' . preg_replace('/\+0000$/', 'GMT', date('r', $tstamp)));
header('Expires: ' . preg_replace('/\+0000$/', 'GMT', date('r', $expires)));
if($this->expires == 0) {
header('Cache-Control: private, no-cache, must-revalidate');
header('Pragma: no-cache');
}
header_remove('X-Powered-By');
}
public function rtalabel() {
$this->rtalabel = true;
}
public function whiteListObject($type) {
$type = strtolower(trim($type));
if(! in_array($type, $this->objectwhitelist)) {
$this->objectwhitelist[] = $type;
}
}
public function addKeywords($arg=array()) {
if (is_array($arg)) {
$this->keywords = array_merge($this->keywords, $arg);
} else {
$this->keywords[] = $arg;
}
}
public function addOpenGraph($property, $content, $set='', $model='', $orig='') {
if((strlen($property) * strlen($content)) == 0) {
return FALSE;
}
if(substr($property, 0, 3) != 'og:') {
$property = 'og:' . $property;
}
$set = trim($set);
$model = trim($model);
$orig = trim($orig);
$meta = $this->dom->createElement('meta');
$meta->setAttribute('property', $property);
$meta->setAttribute('content', $content);
if((strlen($set) * strlen($model)) != 0) {
$meta->setAttribute('data-2257', $set);
$meta->setAttribute('data-model', $model);
}
if(strlen($orig) > 0) {
$meta->setAttribute('data-orig', $orig);
}
$this->xmlHead->appendChild($meta);
}
public function addTwitterCard($property, $content, $set='', $model='', $orig='') {
if((strlen($property) * strlen($content)) == 0) {
return FALSE;
}
if(substr($property, 0, 8) != 'twitter:') {
$property = 'twitter:' . $property;
}
$set = trim($set);
$model = trim($model);
$orig = trim($orig);
$meta = $this->dom->createElement('meta');
$meta->setAttribute('name', $property);
$meta->setAttribute('content', $content);
if((strlen($set) * strlen($model)) != 0) {
$meta->setAttribute('data-2257', $set);
$meta->setAttribute('data-model', $model);
}
if(strlen($orig) > 0) {
$meta->setAttribute('data-orig', $orig);
}
$this->xmlHead->appendChild($meta);
}
public function addDescription($desc) {
$this->description = $desc;
}
public function addStyleSheet($stylename, $serverpath, $fspath="") {
$stylename = trim($stylename);
$serverpath = trim($serverpath);
$fspath = trim($fspath);
$this->domNodes();
if(strlen($fspath) > 0) {
$fullpath = $fspath . $stylename;
if(file_exists($fullpath)) {
$modtime = filemtime($fullpath);
$stylename = preg_replace('/\.css$/', '-' . $modtime . '.css', $stylename);
}
}
$style = $this->dom->createElement('link');
$style->setAttribute('rel', 'stylesheet');
$style->setAttribute('type', 'text/css');
$style->setAttribute('href', $serverpath . $stylename);
$this->xmlHead->appendChild($style);
}
public function addJavaScript($scriptname, $serverpath, $fspath="") {
$scriptname = trim($scriptname);
$serverpath = trim($serverpath);
$fspath = trim($fspath);
$this->domNodes();
if(strlen($fspath) > 0) {
$fullpath = $fspath . $scriptname;
if(file_exists($fullpath)) {
$modtime = filemtime($fullpath);
$scriptname = preg_replace('/\.js$/', '-' . $modtime . '.js', $scriptname);
}
}
$script = $this->dom->createElement('script');
$script->setAttribute('type', 'application/javascript');
$script->setAttribute('src', $serverpath . $scriptname);
$this->xmlHead->appendChild($script);
}
public function sendPage($HTML=FALSE, $status="") {
$this->domNodes();
$this->sanitizeBody();
$this->sanitizeTargetLinks();
$this->fixArticleLandmarks();
$this->adjustHead();
if($HTML) {
$this->xmlHtml->setAttribute('lang', $this->xmlLang);
} else {
$this->xmlHtml->setAttribute('xmlns', $this->xmlns);
$this->xmlHtml->setAttributeNS('http://www.w3.org/XML/1998/namespace', 'xml:lang', $this->xmlLang);
}
if($status == "200") {
$this->sendHeader($HTML, "200");
} else {
$this->sendHeader($HTML);
}
$search[] = '/audio\/x-matroska;codecs=matroska/'; $replace[] = 'audio/x-matroska;codecs=aac';
if($HTML) {
$search[] = '/<\/source>/'; $replace[] = '';
$search[] = '/<\/track>/'; $replace[] = '';
$search[] = '/<\/script></'; $replace[] = "</script>\n<";
print preg_replace($search, $replace, $this->dom->saveHTML());
} else {
$search[] = '/<default:/'; $replace[] = '<';
$search[] = '/<\/default:/'; $replace[] = '</';
print preg_replace($search, $replace, $this->dom->saveXML());
}
}
public function html5domdoc($dom, $xmlLang="en") {
$this->xmlLang = $xmlLang;
$this->dom = $dom;
$docstring = '<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE html><html><head /><body /></html>';
$this->dom->loadXML($docstring);
$this->domNodes();
}
}
?>
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