Xenforo php fonksiyon hatası alıyorum

The following warnings were detected when verifying that your server can run XenForo:
Your server has disabled fundamental core PHP functions via the disable_functions directive in php.ini. This will cause unexpected problems in XenForo. All PHP functions should be enabled.
These will not prevent you from using XenForo, but they should be resolved if possible to ensure optimal functioning. However, you may still continue with the installation.

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