/usr/lib/php/20151012/ is in php7.0-mysql 7.0.33-0+deb9u1.
This file is owned by root:root, with mode 0o755.
| File | Mime Type | Owner | Mode | Size | 
|---|---|---|---|---|
                
                    
    
        
    
    
    ..
    
        
    
                
             | 
        ||||
                    
    
    
    /usr/lib/php/20151012/mysqli.so
    
                 | 
                application/x-sharedlib | root:root | 0o644 | 138.2 KB | 
                    
    
    
    /usr/lib/php/20151012/mysqlnd.so
    
                 | 
                application/x-sharedlib | root:root | 0o644 | 277.4 KB | 
                    
    
    
    /usr/lib/php/20151012/pdo_mysql.so
    
                 | 
                application/x-sharedlib | root:root | 0o644 | 30.4 KB |