Gravity Forms Password Recovery Shortcode

gf_rp_sc.php

<?php

add_shortcode( 'verify_user_pass', 'wp_doin_verify_user_pass' );

/**
 * Shortcode which is used to cover Gravity Forms shortcode. It will not render the password 
 * reset form in case of invalid pass.
 * 
 * @shortcode verify user pass
 */
function wp_doin_verify_user_pass($args, $content = null) {

	// lets make usage of the custom global variable to fetch
	// the values from the safe / cookie validation functions
	global $gf_reset_user;

	// start output buffering for a more visually appealing output
	ob_start();

	if ( !$gf_reset_user || is_wp_error( $gf_reset_user ) ) {
		if ( $gf_reset_user && $gf_reset_user->get_error_code() === 'expired_key' )
			echo '<h2 class="error">The key has expired.</h2>';
		else
			echo '<h2 class="error">The key is invalid</h2>';
	} else {
		echo '<h2>Please update your password below.</h2>';
		echo do_shortcode( $content );
	}

	return ob_get_clean();
}