Title: wc_string_to_bool() undefined
Last modified: November 28, 2025

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# wc_string_to_bool() undefined

 *  Resolved [Pt](https://wordpress.org/support/users/bncpeter/)
 * (@bncpeter)
 * [6 months, 1 week ago](https://wordpress.org/support/topic/wc_string_to_bool-undefined/)
 * Hey just FYI, if WooCommerce is deactivated a call to wc_string_to_bool() will
   lockup the whole admin backend and required intervention via FTP.
   I’d recommend
   using if(function_exists(‘wc_string_to_bool’)) {…} first; indeed for any function
   from outside of your own plugin. Might also be worth checking if WooCommerce 
   is activated right at the top of the plugin and returning early.
 * Here’s the relevant error text:
 * …wp-content/plugins/woocommerce-pdf-invoices-packing-slips/woocommerce-pdf-invoices-
   packingslips.php. Error message: Uncaught Error: Call to undefined function wc_string_to_bool()
   in /home/chch2559/public_html/wp-content/plugins/woocommerce-pdf-invoices-packing-
   slips/woocommerce-pdf-invoices-packingslips.php:639
 * Pete.

Viewing 1 replies (of 1 total)

 *  Plugin Contributor [alexmigf](https://wordpress.org/support/users/alexmigf/)
 * (@alexmigf)
 * [6 months, 1 week ago](https://wordpress.org/support/topic/wc_string_to_bool-undefined/#post-18735461)
 * Hi [@bncpeter](https://wordpress.org/support/users/bncpeter/)
 * This is now fixed [here](https://github.com/wpovernight/woocommerce-pdf-invoices-packing-slips/pull/1366).
 * Thank you for reporting this to us.

Viewing 1 replies (of 1 total)

The topic ‘wc_string_to_bool() undefined’ is closed to new replies.

 * ![](https://ps.w.org/woocommerce-pdf-invoices-packing-slips/assets/icon-256x256.
   png?rev=2189942)
 * [PDF Invoices & Packing Slips for WooCommerce](https://wordpress.org/plugins/woocommerce-pdf-invoices-packing-slips/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/woocommerce-pdf-invoices-packing-slips/#faq)
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 * 1 reply
 * 2 participants
 * Last reply from: [alexmigf](https://wordpress.org/support/users/alexmigf/)
 * Last activity: [6 months, 1 week ago](https://wordpress.org/support/topic/wc_string_to_bool-undefined/#post-18735461)
 * Status: resolved