🐛 [BUG] - Blank page when webp is enabled in is_themecore with a website on netsons - DOMDocument::loadHTML(): Memory allocation failed in Entity, line: 8 in is_themecore/src/Core/Webp/WebpPictureGenerator.php on line 19

[maofree]

Description

Hi
after many tests I think there is a problem with shared plans (with dedicated server and vps is ok)

PHP Warning: DOMDocument::loadHTML(): Memory allocation failed in Entity, line: 8 in /home/kvgzrseu/public_html/NUOVO/modules/is_themecore/src/Core/Webp/WebpPictureGenerator.php on line 19

I get this error from the error_log file in the webroot, because any other errors are shown in the front-office
the problem gives a blank page in the front-office

it happens after to set Webp to on, in the module is_themecore
the website is on netsons, ssd100 solution
it has litespeed but it is not due from it, because the same site on the dedicated server works well, however the dedicated server is on another hosting

perhaps this plan does not have enough resources in the image conversion phase.

now I'm having all the missing webp images regenerated by prestashop in the copy on the dedicated server, since with litespeed it is not possible to do this from the is_themecore module, due to compatibility problems in the htaccess file

bye

Node.js version

v16

php version

8.1

OS and it's version

linux

Browsers

Chrome

Required module/theme

is_themecore

Reproduction steps

1. use a shared solution on netsons

Logs

No response

[maofree]

I copied the site to the other server, I redid the operations to remove the old theme and add the new one, and now the blank page doesn't appear. Maybe it was due to another error. I'll continue and then I'll let you know, before I was very depressed

[maofree]

Hi
the problem continues to be present even if all the webp images have been regenerated, so I don't know what it depends on, if it is a compatibility problem with the netsons server configuration

[maofree]

Hi
I moved the site to another server that has a shared plan but of a different hosting than netsons which uses cpanel and litespeed.
there is the same problem, in the front only a blank page appears with the same errors in the error_log file
maybe it could be a problem when there is cpanel and litespeed which is used for sites in shared plans.
instead for VPS and dedicated servers Plesk and Litespeed are used and in this case there are no problems

[Oksydan]

Hi @maofree,

I am not sure yet how I am going to rewrite webp/avif functionality for is_themecore 5 but for now you can try to suppress errors here https://github.com/Oksydan/is_themecore/blob/main/src/Core/Webp/WebpPictureGenerator.php#L19 via libxml_use_internal_errors(true);

[maofree]

Hi
is it necessary to set so?

libxml_use_internal_errors(true);
$this->doc->loadHTML('' . $this->content, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
libxml_clear_errors();
return $this;

https://www.php.net/manual/en/function.libxml-use-internal-errors.php

[Oksydan]

Hi @maofree,

you can give it a try. I am not able to reproduce the problem. It might be related to server configuration 🤔 or it's limitation. I am not familiar with lightspeed.

[tomasz3k]

Hi there,
I've got same error on my shared hosting.
After doing some super extra magic debug I've ended with solution.

In modules/is_themecore/src/Hook/HtmlOutput.php change $params['html'] = $content; to $params['html'] = &$content;
So do not copy entire html to new var just pass a reference to it. Don't know why but it works.
I thought that its memory limit problem but I have 512MB limit same as dev server so it is not this.

[maofree]

Hi @tomasz3k
I confirm that with this solution I can active webp from is_themecore on netsons with litespeed

thanks

[Oksydan]

Hi @tomasz3k,
I will test try to test it and check memory usage 🤔. If everything will be ok I am going to release one more patch version before version 5. There are few issues that could be closed before main version release.
I would like to get ride of DOMDocument in version 5 of the is_themecore module but I have to find something similar with nice API. I don't want to reinvent the wheel and spend too much time on it.

[maofree]

Hi
some weeks ago I used this solution
In modules/is_themecore/src/Hook/HtmlOutput.php change $params['html'] = $content; to $params['html'] = &$content;
but today, after enabling debugging, I reviewed the problems related to WebpPictureGenerator
I've seen them disappear using this solution

` public function loadContent()
{
libxml_use_internal_errors(true);
$this->doc->loadHTML('' . $this->content, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
libxml_clear_errors();

    return $this;
}`

however I continue to use $params['html'] = &$content;

bye