Title: Undefined array key “elementor_preview”
Last modified: February 18, 2026

---

# Undefined array key “elementor_preview”

 *  [simkog](https://wordpress.org/support/users/simkog/)
 * (@simkog)
 * [3 months, 3 weeks ago](https://wordpress.org/support/topic/undefined-array-key-elementor_preview/)
 * I have thousands of thousands warning lines inside the error log files from this
   plugin.
 *     ```wp-block-code
       [18-Feb-2026 08:43:23 UTC] PHP Warning:  Undefined array key "elementor_preview" in /home/***redacted***/public_html/wp-content/plugins/connect-polylang-elementor/includes/elementor-assets.php on line 52
       ```
   
 * Plugin versions:
    - Elementor (free only), Version 3.35.57
    - Polylang (free only), Version 3.7.7
    - Connect Polylang for Elementor, Version 2.5.5

Viewing 1 replies (of 1 total)

 *  Plugin Contributor [CoolHappy](https://wordpress.org/support/users/narinder-singh/)
 * (@narinder-singh)
 * [2 months, 1 week ago](https://wordpress.org/support/topic/undefined-array-key-elementor_preview/#post-18866517)
 * Hi,
   Thank you for reporting this issue.The warning you’re seeing: Undefined array
   key ‘elementor_preview’ is caused by the plugin accessing the `elementor_preview`
   value from the URL without properly ensuring the key exists first. In PHP 8+,
   accessing a non-existent array key triggers a warning, which is why your error
   logs are filling up with thousands of entries.To resolve this, please update 
   the following file:**File path:**`/connect-polylang-elementor/includes/elementor-
   assets.php`(around line 57)Replace this line:
 * $is_preview = isset( $_GET[‘elementor_preview’] ) && ! empty( sanitize_key( wp_unslash(
   $_GET[‘elementor_preview’] ) ) );
 * With the following code:
 * $preview_val = isset( $_GET[‘elementor_preview’] ) ? sanitize_key( wp_unslash(
   $_GET[‘elementor_preview’] ) ) : ”; $is_preview = $preview_val !== ”;
 * This change ensures that `$_GET['elementor_preview']` is only accessed when it
   actually exists, preventing PHP 8 from generating the “Undefined array key” warning.
   There is no change in functionality — this is strictly a compatibility fix and
   will stop the excessive log entries.
   Please refer to the screenshot here for 
   reference:[https://prnt.sc/HSTOcEUF9HzX](https://prnt.sc/HSTOcEUF9HzX)After applying
   this change, the warnings should stop immediately.We will include these changes
   in upcoming updates.Let us know if you need any assistance.

Viewing 1 replies (of 1 total)

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## Tags

 * [php](https://wordpress.org/support/topic-tag/php/)
 * [warning](https://wordpress.org/support/topic-tag/warning/)

 * 1 reply
 * 2 participants
 * Last reply from: [CoolHappy](https://wordpress.org/support/users/narinder-singh/)
 * Last activity: [2 months, 1 week ago](https://wordpress.org/support/topic/undefined-array-key-elementor_preview/#post-18866517)
 * Status: not resolved