Title: Invalid printf string
Last modified: May 6, 2021

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# Invalid printf string

 *  ResolvedModerator [Dion Hulse](https://wordpress.org/support/users/dd32/)
 * (@dd32)
 * Meta Developer
 * [5 years ago](https://wordpress.org/support/topic/invalid-printf-string/)
 * Hi!
 * Your plugin includes a translatable string within `sprintf` which does not work.
 * [https://translate.wordpress.org/projects/wp-plugins/wp-optimize/dev/es-co/default/?filters%5Bstatus%5D=either&filters%5Boriginal_id%5D=8981638&filters%5Btranslation_id%5D=83944130](https://translate.wordpress.org/projects/wp-plugins/wp-optimize/dev/es-co/default/?filters%5Bstatus%5D=either&filters%5Boriginal_id%5D=8981638&filters%5Btranslation_id%5D=83944130)
 * `return sprintf(__('A cache purge request has been sent to %s. Please note that
   it may not work 100% of the time, due to cache rate limiting by your host!', '
   wp-optimize'), '<strong>WP Engine</strong>');`
 * The percent symbol must be escaped as `%%` when included within a string that
   is passed to printf, currently this just returns false instead and as a result
   this string is never seen by users.

Viewing 1 replies (of 1 total)

 *  [Harshad](https://wordpress.org/support/users/bornforphp/)
 * (@bornforphp)
 * [5 years ago](https://wordpress.org/support/topic/invalid-printf-string/#post-14409790)
 * [@dd32](https://wordpress.org/support/users/dd32/) Thanks for reporting this,
   I’ll share the same with our development team to get fixed in future release.

Viewing 1 replies (of 1 total)

The topic ‘Invalid printf string’ is closed to new replies.

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 * 1 reply
 * 2 participants
 * Last reply from: [Harshad](https://wordpress.org/support/users/bornforphp/)
 * Last activity: [5 years ago](https://wordpress.org/support/topic/invalid-printf-string/#post-14409790)
 * Status: resolved