DOMDocument::saveXML
I had a tricky issue using this method, i thought it was bug but i realized i misundestood something about namespaces.
When you want to use a schema to describe an xml document, you basically put the default namespace to a personnal namespace (and you refer to this namespace in the targetNamespace attribute of your schema).
<?xml version="1.0" encoding="utf-8"?>
<root xmlns="http://my.uri.net">
<elt>
<x>blabla</x>
<y>blabla</y>
</elt>
</root>
That xmlns attribute specifies a "default namespace" and means that the root element and its children are in this namespace.
What i misunderstood is that, there's no way with the DOM api to specify a "default namespace" for each children of the root element.
Thus you may need to use createElementNS() and createAttributeNS() methods for each created element or attribute in the document specifying the URI of your namespace each time ("http://my.uri.net").
This only applies if you want to validate a document built with the API, not with a document loaded from an xml file or stream.
DOMDocument::schemaValidate
(No version information available, might be only in CVS)
DOMDocument::schemaValidate — Validates a document based on a schema
Description
bool DOMDocument::schemaValidate
( string $filename
)
Validates a document based on the given schema file.
Parameters
- filename
-
The path to the schema.
Return Values
Returns TRUE on success or FALSE on failure.
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User Contributed NotesDOMDocument::schemaValidate
poletto at jeuxvideo dot com
13-Feb-2008 09:32
13-Feb-2008 09:32
nevyn at NOSPAM dot email dot it
19-Dec-2006 02:41
19-Dec-2006 02:41
I've seen that trying to validate an XML with a schema containing keys, they were ignored, and the XML was considered still valid altough it contained duplicate keys.
justin at redwiredesign dot com
08-Nov-2006 12:32
08-Nov-2006 12:32
In his previous comment, Mike A wrote about validating documents using an XSD. However, you can validate without one. In my case, I needed to ensure that the content entered was just valid XML or not, and I couldn't find an XSD to support that. So I wrote this:
public static function validate($xml)
{
libxml_use_internal_errors(true);
$doc = new DOMDocument('1.0', 'utf-8');
$doc->loadXML($xml);
$errors = libxml_get_errors();
if (empty($errors))
{
return true;
}
$error = $errors[0];
if ($error->level < 3)
{
return true;
}
$lines = explode("\r", $xml);
$line = $lines[($error->line)-1];
$message = $error->message.' at line '.$error->line.':<br />'.htmlentities($line);
return $message;
}
The catch here is that the function only checks for the first error is LIBXML_ERR_FATAL, which would break XSL/XML compilation.
In my experience, the errors are returned by libxml_get_errors in descending severity, so this may be an OK thing to do.
Mike A.
17-Feb-2006 09:03
17-Feb-2006 09:03
For more detailed feedback from DOMDocument::schemaValidate, disable libxml errors and fetch error information yourself. See http://php.net/manual/en/ref.libxml.php for more info.
example.xml
<?xml version="1.0"?>
<example>
<child_string>This is an example.</child_string>
<child_integer>Error condition.</child_integer>
</example>
example.xsd
<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified">
<xs:element name="example">
<xs:complexType>
<xs:sequence>
<xs:element name="child_string" type="xs:string"/>
<xs:element name="child_integer" type="xs:integer"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
<?php
function libxml_display_error($error)
{
$return = "<br/>\n";
switch ($error->level) {
case LIBXML_ERR_WARNING:
$return .= "<b>Warning $error->code</b>: ";
break;
case LIBXML_ERR_ERROR:
$return .= "<b>Error $error->code</b>: ";
break;
case LIBXML_ERR_FATAL:
$return .= "<b>Fatal Error $error->code</b>: ";
break;
}
$return .= trim($error->message);
if ($error->file) {
$return .= " in <b>$error->file</b>";
}
$return .= " on line <b>$error->line</b>\n";
return $return;
}
function libxml_display_errors() {
$errors = libxml_get_errors();
foreach ($errors as $error) {
print libxml_display_error($error);
}
libxml_clear_errors();
}
// Enable user error handling
libxml_use_internal_errors(true);
$xml = new DOMDocument();
$xml->load('example.xml');
if (!$xml->schemaValidate('example.xsd')) {
print '<b>DOMDocument::schemaValidate() Generated Errors!</b>';
libxml_display_errors();
}
?>
Old error message:
Warning: DOMDocument::schemaValidate() [function.schemaValidate]: Element 'child_integer': 'Error condition.' is not a valid value of the atomic type 'xs:integer'. in example.php on line 40
New error message:
DOMDocument::schemaValidate() Generated Errors!
Error 1824: Element 'child_integer': 'Error condition.' is not a valid value of the atomic type 'xs:integer'. in example.xml on line 4