How to abort a Contact Form 7 submission?

Question

WordPress

I use the following hook for Contcact Form 7

add_action("wpcf7_posted_data", "wpcf7_modify_this");
function wpcf7_modify_this($posted_data) {

  
      $url = strpos($posted_data['your-message'], 'http://');
    
    if ($url) {
      return false;
    }
  

  return $posted_data;
}

Required instead of return false; do a reset of the form submission (so that the letter is not sent) or an error output. Can this be implemented?

Answer 1

You need to use the wpcf7_validate_ dynamic hook.
More or less like this:

add_filter( 'wpcf7_validate_textarea', 'custom_textarea_validation_filter', 20, 2 );
add_filter( 'wpcf7_validate_textarea*', 'custom_textarea_validation_filter', 20, 2 );
 
function custom_textarea_validation_filter( $result, $tag ) {
    if ( 'your-message' == $tag->name ) {
        $your_message = isset( $_POST['your-message'] ) ? trim( $_POST['your-message'] ) : '';
 
        if ( strpos($your_message, 'http://') !== false ) {
            $result->invalidate( $tag, "Incorrect value" );
        }
    }
 
    return $result;
}

Documentation for creating your own validation rules .