Later, I thought it might be a problem with the system path environment variable setting, so I referred to the path variable value under Winnt with Oracle installed, and found that there was no "%driver%:oracleora81 in;" in the path variable value of W2K (maybe the operating system is different) caused), and oci.dll was found under bin! !
Immediately add this string to the path manually, restart the server, and the problem is solved!
Note: For driver%:oracleora81 in, please change it according to the Oracle installation path
erquan Note: Please first make sure that your php.ini is configured correctly and the WEB service has been restarted, such as
extension_dir=%PHP_Path%extensions
extension=php_oci8.dll