What is the specific function of SET NAMES UTF8?

To prevent garbled characters, I'm setting up several character sets for DB:

        mysqli_query($db,"SET NAMES UTF8");        mysqli_query($db,"set character_set_client=utf8");        mysqli_query($db,"set character_set_connection=utf8");        mysqli_query($db,"set character_set_results=utf8");

But I see an article saying this:
http://zhangxugg-163-com.iteye.com/blog/1835721

According to the above description, SET NAMES UTF8 does one have equal to set character_set_client=utf8; set character_set_connection=utf8; set character_set_results=utf8; these three articles?

Let's talk.
.`

Reply content:

To prevent garbled characters, I'm setting up several character sets for DB:

        mysqli_query($db,"SET NAMES UTF8");        mysqli_query($db,"set character_set_client=utf8");        mysqli_query($db,"set character_set_connection=utf8");        mysqli_query($db,"set character_set_results=utf8");

But I see an article saying this:
http://zhangxugg-163-com.iteye.com/blog/1835721

According to the above description, SET NAMES UTF8 does one have equal to set character_set_client=utf8; set character_set_connection=utf8; set character_set_results=utf8; these three articles?

Let's talk.
.`

set NAMES utf8show variables like "character_set_%"

The operation is shown like this

As answered above, changed the Character_set_client/character_set_connection/character_set_results three values

Yes, one command equals your list of 3, mainly to ensure that the encoding consistency is not garbled

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