In WordPress, PHP calls and MYSQ calls L which is faster

Wordpress
You want to invoke the corresponding picture according to the category ID
PHP words, want to write a case Judgment statement to invoke
or write a MySQL value, and then write a statement called
Some sort of a researcher.
Could you tell me which one is faster?

Reply to discussion (solution)

Maintainability is naturally MySQL dominant
The query speed depends on your file organization

If you write 500 case, then you should be dismissed.

Only the MySQL value is written, is it not the same to be taken out to judge?

Of course MySQL is called well.

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