What is a slug in development?

Question

IT terminology

Recently I saw the word slug in the source code . I saw it in other places, but I didn’t understand what it means. Google throws out slugs. What it is?

Answer 1

Most often, as already written, it occurs in the URL, but still its meaning is a little wider - slug is a unique identifier string that is understandable to a person (as opposed to ID) and contains only "safe" characters:
- 0-9
- a-z(generally accepted - in lowercase )
- symbol -
- sometimes also a symbol _
Can be used not only in URL for clarity, but also, for example, in queries to the database (primarily at the API level) - after all, it is
more understandable than
SELECT * FROM pages WHERE category=126.
At the API level, it looks like
or
$object->get_pages_in_category( 'some-slug' ).
In general, it is a human-readable unique identifier.