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Sanitization means clearing data (often: user input) of unwanted input. This is done to prevent errors or security problems like injection of malicious code into the database. WP offers over a large number of sanitization functions to make data safe for further usage.

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How to allow certain PHP functions when using sanitize_callback in the word press customizer

Hi I am making my own theme in WordPress and setting up some customizer options and I have one for the text in my footer but I would like to still use <? echo date('Y');?> in the footer to dynamicall …