Le traitement des erreurs XML lors du chargement d'un document est une tâche simple. En utilisant les fonctionnalités libxml, il est possible de supprimer toutes les erreurs XML lors du chargement d'un document, puis, de les parcourir.
L'objet libXMLError, retourné par la fonction libxml_get_errors(), contient plusieurs propriétés dont le message, la ligne et la colonne (position) de l'erreur.
Exemple #1 Chargement de chaînes XML cassées
<?php
libxml_use_internal_errors(true);
$sxe = simplexml_load_string("<?xml version='1.0'><broken><xml></broken>");
if ($sxe === false) {
echo "Erreur lors du chargement du XML\n";
foreach(libxml_get_errors() as $error) {
echo "\t", $error->message;
}
}
?>L'exemple ci-dessus va afficher :
Erreur lors du chargement du 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.