How to show each user their running total of a custom field? - php

Question

I'll start by throwing myself on the mercy of you fine people as a complete newb to php and stackoverflow. I've searched for the answer here and elsewhere and I'm having trouble piecing it all together.
Here's my problem-
I've set up a form (using gravity forms) where logged in users can log "flight hours" after every flight. I'm using gravity forms to post this data to a custom post called "my-flight-record" where I've mapped all the fields from the form. Now, I simply want to show the user a running total of one field, wpcf-total-flight-time, but i only want to show the user their own total time.
Here's the code i'm currently using, but it sums ALL entries. I only want to sum the entry for the current user (who should also be logged in before they can even see this page).
<?php
//get current user
global $current_user;
get_currentuserinfo();
$userPosts = get_posts(array('author' => $current_user->ID, 'post_type'=> 'my-flight-record'));
// loop to create array of ids by user
foreach ($userPosts as $post) {
setup_postdata($post);
$ids[] = get_the_ID();
}
$idList = implode(",", $ids);
$meta_key = 'wpcf-total-flight-time';//set this to your custom field meta key
$allflighthours = $wpdb->get_col($wpdb->prepare("
SELECT meta_value
FROM $wpdb->postmeta
WHERE meta_key = %s
AND post_id in (" . $idList . ")", $meta_key));
echo 'My total flight hours logged = ' . array_sum( $allflighthours) . ''; ?>
This code results in a total, but for everyone, not just logged in user. Also, the '$idList = implode(",", $ids);' line results in an error for me.
Please help me help myself! I'm sure I've left out vital info - let me know what i'm missing!

Answer 1

Why do you need two separate database queries? Try this:
<?php
//get current user
global $current_user;
get_currentuserinfo();
$userPosts = get_posts(array('author' => $current_user->ID,
'post_type'=> 'my-flight-record'));
//initialize an empty array
$flight_hours = array();
// loop to create array of ids by user
foreach ($userPosts as $post) {
setup_postdata($post);
$flight_hours[] = get_post_meta(get_the_ID(), 'wpcf-total-flight-time', true);
}
printf('My total flight hours logged = %s ', array_sum( $flight_hours) ); ?>
As ipauler notes in his answer, you should implement some error checking to make sure there is a logged in user, and the wpcf-total-flight-time data is both present and valid.

Answer 2

First you need to check if user is logged in
Some example from wordpress documentation
if(!is_user_logged_in()) {
//no user logged in
}
http://codex.wordpress.org/Function_Reference/get_currentuserinfo#Parameters
//get current user
global $current_user;
if(is_user_logged_in()) {
get_currentuserinfo();
$userPosts = get_posts(array('author' => $current_user->ID, 'post_type'=> 'my-flight-record'));
// loop to create array of ids by user
foreach ($userPosts as $post) {
setup_postdata($post);
$ids[] = get_the_ID();
}
$idList = implode(",", $ids);
$meta_key = 'wpcf-total-flight-time';//set this to your custom field meta key
$allflighthours = $wpdb->get_col($wpdb->prepare("
SELECT meta_value
FROM $wpdb->postmeta
WHERE meta_key = %s
AND post_id in (" . $idList . ")", $meta_key));
echo 'My total flight hours logged = ' . array_sum( $allflighthours) . '';
}