Disallowed Key Characters in url

This is saved in - ./application/core/MY_Input.php

PHP Code:

class MY_Input extends CI_Input
{

} 


If Library is in ./system/core then you      - Save in ./application/core/Filename.php

If Library is in ./system/libraries then you - Save in ./application/libraries/Filename.php

What did you Try? What did you Get? What did you Expect?

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