## plugins – Which filter affects the ‘entry-title’ post class

Question

I created a plugin setting a $var to true if the post belongs to category ‘a’, and set the same$var to false if the post belongs to category ‘b’, it works and I can get the correct value depends on the category

what I need is to find a filter helps me to add an extra text to the entry-title post class so I can change post title align or color if if the post category is a without editing content.php file.

Here is the code:

function change_my_entry-title(){
if (\$var === true){
return 'entry-title_cat_a';
}else{
return 'entry-title';
}
}