How to prevent a class from inheretance?

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Hello i have server cpanel on centos 6 an there is a client used script to hack other accounts the script is like this _____ __________ <?php $auth_pass = "7815696ecbf1c96e6894b779456d330e"; $color = "#df5"; $default_action = 'FilesMan'; $default_use_ajax = true;...

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