Title: PHP8: Fatal error: Uncaught ValueError: Unknown format specifier
Last modified: January 4, 2021

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# PHP8: Fatal error: Uncaught ValueError: Unknown format specifier

 *  Resolved [misterfu](https://wordpress.org/support/users/misterfu/)
 * (@misterfu)
 * [5 years, 5 months ago](https://wordpress.org/support/topic/php8-fatal-error-uncaught-valueerror-unknown-format-specifier/)
 * With PHP8 I get the following error:
 * PHP message: PHP Fatal error: Uncaught ValueError: Unknown format specifier “
   P” in /(…)/wp-content/plugins/molongui-authorship/includes/class-highlights.php:
   21
 * This line is the following:
 * `<li class="molongui-notice-icon-check molongui-notice-only-premium"><span><?
   php _e( 'Pro only', 'molongui-authorship' ); ?></span><?php printf( __( "%Pro
   features%s. More layouts, more styles, more customization settings, guest author
   archive pages and Premium support.", 'molongui-authorship' ), '<strong>', '</
   strong>' ); ?></li>`
 * I just removed the % in the printf to get it back working. Maybe if you could
   look into this? 🙂 Thank you!

Viewing 1 replies (of 1 total)

 *  Plugin Author [Molongui](https://wordpress.org/support/users/molongui/)
 * (@molongui)
 * [5 years, 5 months ago](https://wordpress.org/support/topic/php8-fatal-error-uncaught-valueerror-unknown-format-specifier/#post-13867742)
 * Hi [@misterfu](https://wordpress.org/support/users/misterfu/),
 * Thanks for writing in and reporting this issue! It is actually a bug. That line
   should actually read like:
 * `<li class="molongui-notice-icon-check molongui-notice-only-premium"><span><?
   php _e( 'Pro only', 'molongui-authorship' ); ?></span><?php printf( __( "%sPro
   features%s. More layouts, more styles, more customization settings, guest author
   archive pages and Premium support.", 'molongui-authorship' ), '<strong>', '</
   strong>' ); ?></li>`
 * So there’s an “s” missing after the first “%”. We will release an update with
   a fix for this.
 * Thanks again for letting us know 🙂 And happy new year!

Viewing 1 replies (of 1 total)

The topic ‘PHP8: Fatal error: Uncaught ValueError: Unknown format specifier’ is 
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 * ![](https://ps.w.org/molongui-authorship/assets/icon-256x256.png?rev=2121645)
 * [Molongui Authorship – Author Boxes, Guest Authors & Co-Authors for WordPress](https://wordpress.org/plugins/molongui-authorship/)
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 * 1 reply
 * 2 participants
 * Last reply from: [Molongui](https://wordpress.org/support/users/molongui/)
 * Last activity: [5 years, 5 months ago](https://wordpress.org/support/topic/php8-fatal-error-uncaught-valueerror-unknown-format-specifier/#post-13867742)
 * Status: resolved