how to create a shortcode from a variable in plugin - php

Question

i'm using WP User Frontend Pro plugin
i want to echo the pack title using a shortcode to put it in bakery visual.
all what i know is : this is the title $pack->post_title;
$pack is coming from here :
public function current_pack() {
global $pack;
$pack = $this->pack;
if ( ! isset( $this->pack['pack_id'] ) ) {
$pack_page = get_permalink( wpuf_get_option( 'subscription_page', 'wpuf_payment' ) );
return new WP_Error( 'no-pack', sprintf( __( 'You must purchase a subscription package before posting', 'wp-user-frontend'), $pack_page ) );
}
// seems like the user has a pack, now check expiration
if ( $this->expired() ) {
return new WP_Error( 'expired', __( 'The subscription pack has expired. Please buy a pack.', 'wp-user-frontend' ) );
}
return $pack;
}
i try to do something like this :
function wpc_shortcode_pack_title() {
global $pack;
return $pack->post_title;
}
add_shortcode( 'sub_name', 'wpc_shortcode_pack_title' );
to explain more
the slected code in line 5 is working correctly in the plugin pages
but i want it as a shortcode
but it didn't work
any help please ?

Answer 1

The callback function of add_shortcode() should return the content, not print it.
Meaning, you have to return $pack->post_title instead of echo $pack->post_title.
Like so:
function wpc_shortcode_pack_title() {
global $pack;
return $pack->post_title;
}
add_shortcode( 'sub_name', 'wpc_shortcode_pack_title' );
Edit: After taking a look at the source of “WP User Frontend Pro”:
$pack seems to be getting its value from WPUF_Subscription::get_subscription() passing the subscription id, which basically gets the post with that id.
The subscription id seems to be getting its value from WPUF_Subscription::get_user_pack() passing the user id.
So, I guess you could call get_current_user_id() and try something like this:
function wpc_shortcode_pack_title() {
$user_id = get_current_user_id();
if ( ! class_exists( 'WPUF_Subscription' ) ) {
return 'WP User Frontend Pro is not installed/activated';
}
$user_sub = WPUF_Subscription::get_user_pack( $user_id );
$pack = WPUF_Subscription::get_subscription( $user_sub['pack_id'] );
return $pack->post_title;
}
add_shortcode( 'sub_name', 'wpc_shortcode_pack_title' );
Edit #2: To get the expire date as well, you would do something similar:
function wpc_shortcode_pack_title() {
$user_id = get_current_user_id();
if ( ! class_exists( 'WPUF_Subscription' ) ) {
return 'WP User Frontend Pro is not installed/activated';
}
// Get WPUF subscription/pack
$user_sub = WPUF_Subscription::get_user_pack( $user_id );
$pack = WPUF_Subscription::get_subscription( $user_sub['pack_id'] );
// Get expiration date
$expire = ( $user_sub['expire'] == 'unlimited' ) ? ucfirst( 'unlimited' ) : wpuf_date2mysql( $user_sub['expire'] );
return sprintf(
'Subscription name: %1$s | Expire date: %2$s',
$pack->post_title,
wpuf_get_date( $expire )
);
}
add_shortcode( 'sub_name', 'wpc_shortcode_pack_title' );