El manejo de errores XML al cargar un documento es una tarea sencilla. Utilizando las funcionalidades libxml, es posible suprimir todos los errores XML al cargar un documento, y luego recorrerlos.
El objeto libXMLError, devuelto por la función libxml_get_errors(), contiene varias propiedades como el mensaje, la línea y la columna (posición) del error.
Ejemplo #1 Carga de cadenas XML rotas
<?php
libxml_use_internal_errors(true);
$sxe = simplexml_load_string("<?xml version='1.0'><broken><xml></broken>");
if ($sxe === false) {
echo "Error al cargar el XML\n";
foreach(libxml_get_errors() as $error) {
echo "\t", $error->message;
}
}
?>El resultado del ejemplo sería:
Error al cargar el XML
Blank needed here
parsing XML declaration: '?>' expected
Opening and ending tag mismatch: xml line 1 and broken
Premature end of data in tag broken line 1
Note that "if (! $sxe) {" may give you a false-negative if the XML document was empty (e.g. "<root />"). In that case, $sxe will be:
object(SimpleXMLElement)#1 (0) {
}
which will evaluate to false, even though nothing technically went wrong.
Consider instead: "if ($sxe === false) {"If you need to process the content of your broken XML-doc you might find this interesting. It has blown past a few simple corruptions for me.
http://php.net/manual/en/class.domdocument.php#domdocument.props.recoverNow that the /e modifier is considered deprecated in preg_replace, you can use a negative lookahead to replace unescaped ampersands with & without throwing warnings:
$str = preg_replace('/&(?!;{6})/', '&', $str);
You probably should have been doing this before /e was deprecated, actually.