Fatal error: Uncaught Error: Call to undefined function wp_get_current_user()

Question

I wanted to store the current user ID to the database, but instead I got that error, the php file is custom and i put it inside my wordpress theme folder, how can I fix this? I wanted to make a simple custom php script that can store data to the database. And I think wp_get_current_user() is the problem, how do I use it properly?

Here is my code

$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

$current_user = wp_get_current_user();

$current_user_id = $current_user->ID;

$title = mysqli_real_escape_string($conn, $_REQUEST['title']);
$department = mysqli_real_escape_string($conn, $_REQUEST['department']);
$date_today = date("Y-m-d");
$doc = $_FILES['fileName']['name'];
$doc_path = $_SERVER['DOCUMENT_ROOT'] . "/wordpress/wp-content/uploads/documents/" . $doc;



$sql = "INSERT INTO wp_document (ID,
                              department, 
                              title, 
                              submit_date,
                              doc_path,
                              revision_count,
                              rejection_count,
                              status) 
        VALUES ($current_user_id, '$department', '$title','$date_today', '$doc_path', 0, 0, 'Not Reviewed')";

if (mysqli_query($conn, $sql)) {
    echo "New record created successfully";
} else {
    echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}

What do you mean? what should I check? I'm kinda new with wordpress — Beginner Coder
– Beginner Coder, Commented Nov 2, 2020 at 9:09
Does this answer your question? wordpress plugin -> Call to undefined function wp_get_current_user() — nbk
– nbk, Commented Nov 2, 2020 at 9:20
No, I still got an error "Fatal error: Uncaught Error: Call to undefined function add_action()" — Beginner Coder
– Beginner Coder, Commented Nov 3, 2020 at 3:01

Raptor · Accepted Answer · 2020-11-03 07:05:53Z

1

If you want to use WordPress functions or WPQuery

include('/var/www/html/pub_html/wp-blog-header.php');
$prefix =  $wpdb->base_prefix;

Include above file on your custom PHP it will establish WordPress connections

edited Nov 3, 2020 at 7:05

Raptor

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answered Nov 2, 2020 at 9:47

Shantun Parmar

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2 Comments

Beginner Coder Over a year ago

I just need to include wp-blog-header.php thanks for the help!! work like a charm!

Raptor Over a year ago

This answer is incorrect. Not all WordPress located at the path you specified. Also, never use include(), use require() instead.

BhAvik Gajjar · Accepted Answer · 2020-11-03 08:08:22Z

0

Recently Faced same error and fixed using below code

<?php
if(!function_exists('wp_get_current_user')) {
    include(ABS_PATH . "wp-includes/pluggable.php"); 
}
?>

edited Nov 3, 2020 at 8:08

answered Nov 2, 2020 at 9:24

BhAvik Gajjar

4563 silver badges19 bronze badges

2 Comments

Beginner Coder Over a year ago

Warning: Use of undefined constant ABSPATH - assumed 'ABSPATH' (this will throw an Error in a future version of PHP) still got an error

Raptor Over a year ago

Spelling mistake, it should be ABS_PATH

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