Searching custom fields in attachments

Hi. I have a list of custom fields (ACF) in my attachments and like to search for some content in these fields. Perhaps you can help me. Looking forward to hear from you.

I have a shortcode on a special page for search activities in place

[mla_gallery s="{+template:({+request:sk+})+}" link=file mla_search_fields=title,name,excerpt,content,alt-text,file,terms]

and would like to extend it for custom fields

[mla_gallery s="{+template:({+request:sk+})+}" link=file mla_search_fields=title,name,excerpt,content,alt-text,file,terms multi_search="custom:*='{+template:({+request:sk+})+}'"]

Idea is to give user the opportunity to enter a string which will be searched everywhere.

I ‘ve seen mla-multi-search-example.php and want to make use of the parameter All Field Names. For now I am searching for a full match, fielda contains ValueA. I am searching for ValueA.

/search/?sk='Hamburg Eichtalpark'

I did a simple test as you proposed in the documentation. Content of the log file is:

[25-Mar-2024 17:29:41] 709 MLACore::mla_plugins_loaded_action() MLA 3.13 () mla_debug_level 0x3
[25-Mar-2024 17:29:55] 709 MLACore::mla_plugins_loaded_action() MLA 3.13 () mla_debug_level 0x3