unable to load ldap extension

i follow this to add the ldap extension
[https://github.com/Azure/wordpress-linux-appservice/blob/main/WordPress/wordpress_adding_php_extensions.md](https://github.com/Azure/wordpress-linux-appservice/blob/main/WordPress/wordpress_adding_php_extensions.md)

in step 3 the version i use is php82-ldap
after finishing step 1-7, the ldap.so is failed to load

it show in error log

PHP Warning: PHP Startup: Unable to load dynamic library '/home/site/ext/ldap.so' (tried: /home/site/ext/ldap.so (Error loading shared library libldap.so.2: No such file or directory (needed by /home/site/ext/ldap.so)), /usr/local/lib/php/extensions/no-debug-non-zts-20220829//home/site/ext/ldap.so.so (Error loading shared library /usr/local/lib/php/extensions/no-debug-non-zts-20220829//home/site/ext/ldap.so.so: No such file or directory)) in Unknown on line 0

i tried to copy the libldap.so.2 to the /home/site/ext/ folder too but no luck

thanks