silverstripe-framework/model/HTMLValue.php

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<?php
/**
* This class acts as a wrapper around the built in DOMDocument class in order to use it to manage a HTML snippet,
* rather than a whole document, while still exposing the DOMDocument API.
*
* @package framework
* @subpackage integration
*/
class SS_HTMLValue extends ViewableData {
/**
* @var DOMDocument
*/
protected $document;
/**
* @param string $content
*/
public function __construct($content = null) {
$this->document = new DOMDocument('1.0', 'UTF-8');
$this->document->scrictErrorChecking = false;
$this->setContent($content);
parent::__construct();
}
/**
* @return string
*/
public function getContent() {
// strip any surrounding tags before the <body> and after the </body> which are automatically added by DOMDocument
// note that we can't use the argument to saveHTML() as it's only supported in PHP 5.3.6+, we support 5.3.2 as a minimum
// in addition to the above, trim any surrounding newlines from the output
return trim(
preg_replace(
array(
'/^<!DOCTYPE.+?>/i',
'/(.*)<body>/i',
'/<\/body>(.*)/i',
),
'',
$this->getDocument()->saveHTML()
)
);
}
/**
* @param string $content
* @return bool
*/
public function setContent($content) {
// Ensure that \r (carriage return) characters don't get replaced with "&#13;" entity by DOMDocument
// This behaviour is apparently XML spec, but we don't want this because it messes up the HTML
$content = str_replace(chr(13), '', $content);
return @$this->getDocument()->loadHTML(
'<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head>' .
"<body>$content</body></html>"
);
}
/**
* @return DOMDocument
*/
public function getDocument() {
return $this->document;
}
/**
* A simple convenience wrapper around DOMDocument::getElementsByTagName().
*
* @param string $name
* @return DOMNodeList
*/
public function getElementsByTagName($name) {
return $this->getDocument()->getElementsByTagName($name);
}
/**
* @see HTMLValue::getContent()
*/
public function forTemplate() {
return $this->getContent();
}
}