/**
* Check if an xml code satisfy the schema.
*
* @param string $xml The xml code to verify
* @param string $filename The name of the file from which the xml code has been read from
*
* @return string[]|null Return null of all is ok, a list of errors otherwise
*/
public static function checkString($xml, $filename = '')
{
$doc = Utilities::stringToDOMDocument($xml, $filename);
$errors = null;
$preUseInternalErrors = libxml_use_internal_errors(true);
try {
if (!$doc->schemaValidateSource(static::getSchema())) {
$errors = Utilities::explainLibXmlErrors($filename);
}
} catch (Exception $x) {
libxml_use_internal_errors($preUseInternalErrors);
libxml_clear_errors();
throw $x;
}
libxml_use_internal_errors($preUseInternalErrors);
return $errors;
}
/**
* Return the XSLT document that fixes a source xml file.
*
* @throws Exception Throws an Exception if the xsd file couldn't be read.
*
* @return DOMDocument
*/
protected static function getXsltDOMDocument()
{
static $cache = null;
$xsltFile = __DIR__ . '/doctrine-xml-0.5.xsl';
if (!isset($cache)) {
$s = is_file($xsltFile) && is_readable($xsltFile) ? @file_get_contents($xsltFile) : false;
if ($s === false) {
throw new Exception('Failed to load the xslt file ' . $xsltFile);
}
$cache = $s;
}
return Utilities::stringToDOMDocument($cache, $xsltFile);
}
