如何找出mysqli扩展的问题？

Question

I'm using PHP 5.6.30 and I need mysqli extension. In php.ini I have

extension_dir = "ext"
...
extension=php_mysqli.dll

ext dir exists in folder where php is installed, and php_mysqli.dll exists in either ext folder and in php install folder. php -m shows that mysqli is installed. Still the following code

new mysqli ( 'localhost', 'root', 'root', 'db_name_here');

outputs Fatal error: Class 'mysqli' not found

The question is: how can I find out what's wrong with mysqli

UPD. I'm using Win7 and the server is Apache 2.4

Answer 1

You can also check if the library is loaded or not in your env

  if (extension_loaded('mysqli') && function_exists('mysqli_init')) {
   echo "having lib";
  }else{
  echo "No library loaded or exist";
  }

Also you can specify fully qualified path for extension_dir.

Check your extension_dir path. It should be fully qualified. ie

   extension_dir = "C:/wamp/php/ext" // your php path folder.