validate a xml file against a xsd using php

Question

how to validate a xml file against a xsd? there is domdocument::schemaValidate() but It does not tell where are the errors. is there any class for that? does it have any worth m

Answer 1

This code does the business:

$xml= new DOMDocument();
$xml->loadXML(<A string goes here containing the XML data>, LIBXML_NOBLANKS); // Or load if filename required
if (!$xml->schemaValidate(<file name for the XSD file>)) // Or schemaValidateSource if string used.
{
   // You have an error in the XML file
}

See the code in http://php.net/manual/en/domdocument.schemavalidate.php To retrieve the errors.

I.e.

justin at redwiredesign dot com 08-Nov-2006 03:32 post.

Answer 2

This is a complete code snippet for displaying xsd validation errors:

    $xml = '<test/>';
    $xsd = '/path/to/xsd';
    // needed for getting errors
    libxml_use_internal_errors(true);

    $domDocument= new DOMDocument();
    $domDocument->loadXML($xml); 
    if (!$domDocument->schemaValidate($xsd)) {
        $errors = libxml_get_errors();
        foreach ($errors as $error) {
            print_r($error);
        }
        libxml_clear_errors();
    }

Answer 3

User contrib from http://php.net/manual/en/domdocument.schemavalidate.php

It works like a charm!

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

<?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();
}

?>