Title: php 8.0+ ValueError thrown Unknown format specifier
Last modified: April 26, 2023

---

# php 8.0+ ValueError thrown Unknown format specifier

 *  [biggyhu](https://wordpress.org/support/users/biggyhu/)
 * (@biggyhu)
 * [3 years, 4 months ago](https://wordpress.org/support/topic/php-8-0-valueerror-thrown-unknown-format-specifier/)
 * I tried to upgrade from php 7.4 to 8.0 or 8.1 but got the same error cuase the
   theme
 * ValueError thrown Unknown format specifier ” “
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fphp-8-0-valueerror-thrown-unknown-format-specifier%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 1 replies (of 1 total)

 *  Thread Starter [biggyhu](https://wordpress.org/support/users/biggyhu/)
 * (@biggyhu)
 * [3 years, 1 month ago](https://wordpress.org/support/topic/php-8-0-valueerror-thrown-unknown-format-specifier/#post-16683994)
 * hi! yes, i change the theme for an original wp theme and a had few days of work
   and then i release it with that 😀
    -  This reply was modified 3 years, 1 month ago by [biggyhu](https://wordpress.org/support/users/biggyhu/).
    -  This reply was modified 3 years, 1 month ago by [biggyhu](https://wordpress.org/support/users/biggyhu/).

Viewing 1 replies (of 1 total)

The topic ‘php 8.0+ ValueError thrown Unknown format specifier’ is closed to new
replies.

 * ![](https://i0.wp.com/themes.svn.wordpress.org/nirvana/1.6.5/screenshot.png)
 * Nirvana
 * [Support Threads](https://wordpress.org/support/theme/nirvana/)
 * [Active Topics](https://wordpress.org/support/theme/nirvana/active/)
 * [Unresolved Topics](https://wordpress.org/support/theme/nirvana/unresolved/)
 * [Reviews](https://wordpress.org/support/theme/nirvana/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [biggyhu](https://wordpress.org/support/users/biggyhu/)
 * Last activity: [3 years, 1 month ago](https://wordpress.org/support/topic/php-8-0-valueerror-thrown-unknown-format-specifier/#post-16683994)
 * Status: not resolved