Title: Warning: filter_var_array() [function.filter-var-array]: Unknown filter with ID
Last modified: September 6, 2026

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# Warning: filter_var_array() [function.filter-var-array]: Unknown filter with ID

 *  [Carsten](https://wordpress.org/support/users/privatedanish/)
 * (@privatedanish)
 * [2 weeks, 6 days ago](https://wordpress.org/support/topic/warning-filter_var_array-function-filter-var-array-unknown-filter-with-id/)
 * Hi Support…
 * I have this issue on the wishlist page: **public_html/wp-content/plugins/ti-woocommerce-
   wishlist/includes/product.helper.php** on line **368**
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fwarning-filter_var_array-function-filter-var-array-unknown-filter-with-id%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

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to reply to this topic.

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 * 0 replies
 * 1 participant
 * Last reply from: [Carsten](https://wordpress.org/support/users/privatedanish/)
 * Last activity: [2 weeks, 6 days ago](https://wordpress.org/support/topic/warning-filter_var_array-function-filter-var-array-unknown-filter-with-id/)
 * Status: not resolved