Case-Insensitive Gravity Forms Email Comparison

functions.php

//Make the Gravity Forms email comparison case-insensitive
add_filter( 'gform_field_validation', function ( $result, $value, $form, $field ) {
    if ( ! $result['is_valid'] && $field->get_input_type() === 'email' ) {
        $email = is_array( $value ) ? rgar( $value, 0 ) : $value;
        if ( $field->emailConfirmEnabled && ! empty( $email ) ) {
            $confirm = is_array( $value ) ? rgar( $value, 1 ) : $this->get_input_value_submission( 'input_' . $field->id . '_2' );
			if ( strcasecmp($confirm,$email) != 0 ) {
                echo 'does not match';
				$result['is_valid'] = false;
                $result['message']  = esc_html__( 'Your emails do not match.', 'gravityforms' );;
			} else {
                $result['is_valid'] = true;
                $result['message']  = '';
            }
		}
    }
    return $result;
}, 10, 4 );