How does php determine how many pieces of data are in the table?

This article mainly explains "php how to judge a few pieces of data in the table". The content in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "php how to judge how there are several pieces of data in the table".

There are several data methods in the php judgment table: 1, create a new PHP file; 2, through "$conn = new mysqli ('10.5.15.177,' root',', 'test')." The code can determine the number of pieces of data in the table.

This article operating environment: windows7 system, PHP7.1 version, DELL G3 computer

How does php determine how many pieces of data are in the table?

1. First, open the php editor and create a new php file, such as index.php.

2. In index.php, enter the code:

$conn = new mysqli ('10.5.15.177', 'root',', 'test'); $sql = "select * from stu"; $r = $conn- > query ($sql); print_r ($r-> num_rows)

3. When the browser runs the index.php page, the number of records printed out of the stu table is 5.

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