How does php judge how many pieces of data there are in the database?
This article mainly explains "php how to judge the database has several pieces of data", the content of the article is simple and clear, easy to learn and understand, the following please follow the editor's ideas slowly in depth, together to study and learn "php how to judge the database has a few pieces of data" bar!
Php judge that the database has several data methods: 1, connect to the database; 2, select the database to query; 3, through the "select count (*) from tablename" statement to query the database there are several pieces of data.
This article operating environment: Windows7 system, PHP7.1 version, Dell G3 computer.
How does php determine how many pieces of data there are in the database?
If the client connects to the database, a statement OK.
Select count (*) from tablename
