Problem validating XML against XSD - PHP/schemaValidate

Question

I'm trying to validate an XML file against an XSD using the function schemaValidate(String file) from DOMDocument. When I validate it on other tools like online validators, it works fine, but in my program I always get this error and really can't find where it's coming from:

Warning: DOMDocument::schemaValidate(product/xxxx/xxxx/xxxxx/xsd/AdlSchema.xsd):
failed to open stream: Permission denied in /home/public_html/xxxx/xxxx.php on line 209
Warning: DOMDocument::schemaValidate(): I/O warning :
failed to load external entity "product/xxxx/xxxx/xxxx/xxxx/xsd/AdlSchema.xsd" in /home/public_html/xxxx/xxxx.php on line 209
Warning: DOMDocument::schemaValidate(): Failed to locate the main schema resource
at 'product/xxxxx/xxxxx/xxxxx/xxxx/xsd/AdlSchema.xsd'. in xxxx/xxxxx.php on line 209
Warning: DOMDocument::schemaValidate(): Invalid Schema in xxxx/xxxx.php on line 209

So my question is, is there a way to get more details about this error (mainly the Invalid schema one) with DOMDocument functions? and if ever someone could tell what could cause that kind of errors that would be great (xml and xsd are kind of confidentials, sorry, but once again it is working just fine with a few other tools).

The first error says permission is denied to the schema file. Are you sure this is not the problem? — sallaigy
– sallaigy, Commented Aug 5, 2011 at 12:28

VolkerK · Accepted Answer · 2011-08-05 12:57:09Z

2

/home/public_html/product/xxxx/xxxx/xxxxx/xsd/AdlSchema.xsd): failed to open stream: Permission denied

The php process doesn't have the necessary rights to access the xsd file.

Let's poke around a little bit and add some debug/info code Please add

/* debug code start. Don't forget to remove */
// if there already is a variable you use as parameter for schemaValidate() use that instead of defining a new one.
$path = '/home/public_html/product/xxxx/xxxx/xxxxx/xsd/AdlSchema.xsd';
foreach( array('file_exists', 'is_readable', 'is_writable') as $fn ) {
    echo $fn, ': ', $fn($path) ? 'true':'false', "<br />\n";
}
$foo = stat($path);
echo 'mode: ', $foo['mode'], "<br />\n";
echo 'uid: ', $foo['uid'], "<br />\n";
echo 'gid: ', $foo['gid'], "<br />\n";
if ( function_exists('getmyuid') ) {
    echo 'myuid: ', getmyuid(), "<br />\n";
}
if ( function_exists('getmygid') ) {
    echo 'myuid: ', getmygid(), "<br />\n";
}

$foo = fopen($path, 'rb');
if ( $foo ) {
    echo 'fopen succeeded';
    fclose($foo);
}
else {
    echo 'fopen failed';
}
/*  debug code end */

right before your call to schemaValidate().

edited Aug 5, 2011 at 12:57

answered Aug 5, 2011 at 12:29

VolkerK

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5 Comments

talnicolas Over a year ago

it does have the necessary rights (own and grp to apache, mod 755). And I just tried the libxml_use_internal_errors(true) and here is what I get

[1] (Code 1549) in on line 0 column 0 XML error "Failed to locate the main schema resource at '/home/public_html/product/xxxx/xxxxx/xxxx/xxxx/xsd/AdlSchema.xsd'. "

VolkerK Over a year ago

sorry, but failed to open stream: Permission denied is quite unequivocal ;-)

talnicolas Over a year ago

ya I agree... but I set all the permissions right and I still get the error I really don't understand...

VolkerK Over a year ago

added some debug script snippet.

talnicolas Over a year ago

well it is working now, I don't know what I changed exactly but for sure it was an access problem... thanks for the debug code, really helpful

Agent Coop · Accepted Answer · 2015-01-03 15:12:02Z

0

I got the same problem using relative paths to XML and XSD schema files. But after I changed it to the absolute ones the problem disappeared.

answered Jan 3, 2015 at 15:12

Agent Coop

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Comments

Bart · Accepted Answer · 2019-07-12 15:07:10Z

0

For me the reason was that the libxml entity loader was disabled (libxml_disable_entity_loader(true);). It seems to have to be enabled to use this function. I switched to DOMDocument::validateSchemaSource since I don't want to have to enable the entity loader.

answered Jul 12, 2019 at 15:07

Bart

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