How to test whether the database connection is successful in mysql

Mysql method to test whether the database connection is successful: first open all relevant ports; then restart iis, the code is [$link = mysql_connect('localhost', 'root', '123456');].

The operating environment of this tutorial: Windows 7 system, mysql version 8.0.22, DELL G3 computer. This method is suitable for all brands of computers.

Related free learning recommendations: mysql video tutorial

Mysql method to test whether the database connection is successful:

Test whether the database is connected successfully The connection is successful

If

Fatal error: Calltoundefinedfunctionmysql_connect() in ......”

appears, don’t panic

We will

     ;extension=php_dba.dll
      ;extension=php_gd2.dll
      ;extension=php_mbstring.dll
      ;extension=php_mcrypt.dll
      ;extension=php_mysql.dll
      ;extension=php_mysqli.dll
      ;extension=php_pdo.dll
      ;extension=php_pdo_mysql.dll
;extension=php_mbstring.dll
       ;extension=php_gd2.dll
       ;extension=php_mysql.dll
       ;extension=php_mcrypt.dll

enable all

and then restart iis. It will be successful

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