function ed_format_champs_wpfusion( $user_meta, $user_id ) {

    // Define fields that need uppercase formatting
    $uppercase_fields = array(
        'ACF_nom',
        'ACF_derniere_entreprise',
        'ACF_derniere_fonction',
        'ACF_nouvelle_entreprise',
        'ACF_nouvelle_fonction',
        'ACF_cabinet'
    );

    // Process each field in the user meta
    foreach ( $user_meta as $field_key => $field_value ) {

        // Check if this field needs uppercase formatting
        if ( in_array( $field_key, $uppercase_fields ) ) {
            // Apply uppercase and trim to text values
            if ( is_string( $field_value ) ) {
                $user_meta[ $field_key ] = mb_strtoupper( trim( $field_value ) );
            }
        }

        // Handle phone number field - remove spaces
        elseif ( $field_key === 'ACF_telephone_mobile' ) {
            if ( is_string( $field_value ) ) {
                $user_meta[ $field_key ] = str_replace( ' ', '', $field_value );
            }
        }
    }

    return $user_meta;
}
add_filter( 'wpf_user_register', 'ed_format_champs_wpfusion', 10, 2 );