Title: Implode PHP error
Last modified: December 16, 2025

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# Implode PHP error

 *  Resolved [andydog66](https://wordpress.org/support/users/andydog66/)
 * (@andydog66)
 * [3 months, 2 weeks ago](https://wordpress.org/support/topic/implode-php-error/)
 * Cf7 is throwing up a PHP error meaning forms aren’t submitting:
 * PHP Fatal error: Uncaught TypeError: implode(): Argument #2 ($array) must be 
   of type ?array, string given
   in /wp-content/plugins/contact-form-7-to-database-
   extension/CF7DBPlugin.php on line 849
 * According to CoPilot:
 * It calls implode() incorrectly — passing a string instead of an array.
 * This throws a fatal error, which causes the 500 server error and makes your form
   submission hang.
 * Best
   Andy

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [Arshid](https://wordpress.org/support/users/arshidkv12/)
 * (@arshidkv12)
 * [3 months, 2 weeks ago](https://wordpress.org/support/topic/implode-php-error/#post-18757927)
 * Sorry, it looks like you’re using a different plugin. Please install CFDB7.
    -  This reply was modified 3 months, 2 weeks ago by [Arshid](https://wordpress.org/support/users/arshidkv12/).
 *  Thread Starter [andydog66](https://wordpress.org/support/users/andydog66/)
 * (@andydog66)
 * [3 months, 2 weeks ago](https://wordpress.org/support/topic/implode-php-error/#post-18758043)
 * Ah, yes – have done, thanks

Viewing 2 replies - 1 through 2 (of 2 total)

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 * 2 replies
 * 2 participants
 * Last reply from: [andydog66](https://wordpress.org/support/users/andydog66/)
 * Last activity: [3 months, 2 weeks ago](https://wordpress.org/support/topic/implode-php-error/#post-18758043)
 * Status: resolved