Reply 229857 to: Use of undefined constant TEMPLATEPATH

Avatar: Rose Tyler
Rose Tyler
Support staff
February 15, 2020 at 09:18

Hello @danghaitrieu91,

What version of WordPress do you use?
It is a default function of WP https://codex.wordpress.org/Function_Reference/is_child_theme , I would recommend you to contact support of WordPress.

Regards

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