Fatal error: Uncaught Error: Call to undefined function mysql_ Connect() problem solving

Fatal error: Uncaught error: Call to undefined function mysql_connect() : Fatal error: Uncaught error: Call to undefined function mysql_connect() when connecting to the database using PHP validation code. This is because the version of PHP you are using does not support the older version of join statement writing. The PHP version used in this study is PHP-7.4.2-NTS-Win32-VC15-x64, and the verification code is:
< ?PHP
the mysql_connect (‘ 127.0.0.1 ‘, ‘runner_db_user’, ‘runner_db_password’)
the OR die (” Could not connect to the database. ‘);
the mysql_select_db (‘ hfjq_race_info ‘);
echo “Connected!” ;
?>
After inquiry, this writing method is the previous version of 5. X, the following code is as follows:
< ?php
$con=mysqli_connect(“127.0.0.1”, “runner_db_user”, “hfjq_race_info”)
OR die(‘Could not connect to database.’);
echo “Connected!” ;
?>
You can connect to the database normally. If you have extension=mysqli, change the semicolon “;” before extension=mysqli. You can connect to the MySQL database normally if you remove it


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