I want to know if I add some short code in functions.php in my theme and solve my problem, What will happen if I update my Theme ?? is my short code delete after update ?? will i have any problem with updating my theme after adding the code to functions.php ?

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    You should provide some more concrete examples of what you're dealing with and what your question is. – phatskat May 2 '19 at 3:10


It's best practice to use a child theme and make your modifications there rather than edit the parent theme directly. This will allow you to to make changes without fear of overwriting your customizations.

From the Codex:

A child theme inherits the look and feel of the parent theme and all of its functions, but can be used to make modifications to any part of the theme. In this way, customizations are kept separate from the parent theme’s files. Using a child theme lets you upgrade the parent theme without affecting the customizations you’ve made to your site.

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