Shield robots from searching php code for email addresses from your website

How can I shield a robot from searching for an email address from your website and then sending spam? if you need a friend, it's annoying to refer to spam, paste the following method to automatically shield robots from collecting email addresses from your website.
The code is as follows:
Function security_remove_emails ($ content ){
$ Pattern = '/([a-zA-Z0-9. _ % +-] + @ [a-zA-Z0-9.-] + \. [a-zA-Z] {2, 4})/I ';
$ Fix = preg_replace_callback ($ pattern,
"Security_remove_emails_logic", $ content );

Return $ fix;
}
Function security_remove_emails_logic ($ result ){
Return antispambot ($ result [1]);
}
Add_filter ('The _ content', 'Flex _ remove_emails ', 20 );
Add_filter ('widget _ text', 'Flex _ remove_emails ', 20 );

Put this in the functions. php file. if the robot collects the email address, it will automatically block it.