Introduce a get_term_by_args filter

[Chouby]

Since #21760 get_term_by() uses get_terms().

get_term_by() term query arguments are thus already filterable with the filter get_terms_args. However it's difficult to detect whether the arguments passed to the filter come from a call to get_term_by() or directly from a more generic call to get_terms().

I thus propose to add new filter specif to get_term_by().

[pbiron]

Thanx @Chouby, I think this is a good idea.

One note, tho: I think the ticket mentioned in the description is incorrect, because it doesn't have anything to do with get_term_by() :-) Can you double-check and correct?

[Chouby]

Maybe the proposed name is not the best. But the filter I propose is in the function get_term_by(), just before it calls get_terms().

[pbiron]

Just to be clear: the proposed filter name seems fine. What I meant was that #27160 is related to TinyMCE and not get_term_by().

That is, the description of this ticket starts:

Since #27160 get_term_by() uses get_terms().

and that is not the correct ticket number where that change happened.

[SergeyBiryukov]

Corrected the ticket number in the description.

[pbiron]

Thanx @SergeyBiryukov for using your "ninga trac searching skills" to find the correct ticket number :-)

[Chouby]

Replying to pbiron:

Just to be clear: the proposed filter name seems fine. What I meant was that #27160 is related to TinyMCE and not get_term_by().

Sorry I completely misunderstood your previous comment. Thanks @SergeyBiryukov :)