How to query the number in php mysql

php Mysql query number method: 1. Create a user table in the mysql database and insert three pieces of data into the table; 2. Connect to the mysql database and use mysqli_select_db to select the database to be operated; 3. , use the mysqli_query function to execute the sql statement; 4. Use the mysqli_num_rows function to obtain the number of records in the previous result set, and use echo to output it.

The operating environment of this tutorial: Windows 7 system, PHP version 8.1, Dell G3 computer.

php How to query the number of result sets in mysql?

In the mysql database, create a user table and insert three pieces of data into the table for testing.

Create a test.php file, and within the file, use the header() method to set the encoding format of the page to utf-8.

In the test.php file, connect to the mysql database and use mysqli_select_db to select the database to operate.

In the test.php file, create a sql statement to query the user data table, and use the mysqli_query function to execute the sql statement.

In the test.php file, use the mysqli_num_rows function to obtain the number of records in the previous result set, and use echo to output it.

Open the test.php file in the browser to view the results.

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