Drupal 7.x

I want to add search weight in my apache solr search. I heared about LTR module.

But I am not able to found exact steps how to install apache solr LTR module / plugin. 

Where could I download related files? and what are exact steps to enable it?

Does it support Drupal as well?

Hello,

i want to code my own views template with custom css class, based on field value. My field is a taxonomy term field and now i want to rewrite the outout of their values and use it as a css class. 

Here is my code: 

<div class='col-md-8 <?php $kat = $fields["field_kategorie"]->raw;
if($kat == 3) {
print "test";
}
else if($kat == 2) {
print "nodepo";
}
echo $kat; ?>'><?php print $fields['field_umsatzanforderung']->content; ?></div>

I have shared cluster hosting and have been using PHP 7.0 just fine.

After updating my sites to PHP 7.3, they display the following errors:

How do I add some JavaScript to the Registration page? Do I need a module with a form_alter in it testing for the for ID plus a node_view function to add in the JavaScript file? Thanks