Wordpress custom plugin wpdb not recognized

Question

I'm developing my first wordpress plugin where I can list all my employees with some CRUD functionality.

When I click "Add Employee" I get a new window where I can fill in all the fields for an employee and after that I click "Save"

But when I click save I get the following PHP error:

   Fatal error: Call to a member function insert() on a non-object in C:\wamp\www\wp-custom-plugin\wp-content\plugins\werknemers\employee_crud_functions.php on line 15

And when I look at line 15 the code is:

 $wpdb->insert( ... )

and this is my form with the action set to that php page

 <form method="POST" action="<?php bloginfo('url') ?>/wp-content/plugins/werknemers/employee_crud_functions.php">

I assume that the file is not aware of the $wpdb variable. But how can I let that php page know what it is? Or am I using it all wrong?

Achrome · Accepted Answer · 2013-06-20 14:20:07Z

2

You are quite possibly missing the global declaration of $wpdb.

From the wpdb reference.

WordPress provides a global variable, $wpdb, 
which is an instantiation of the class already 
set up to talk to the WordPress database. 
Always use the global $wpdb variable. 
(Remember to globalize $wpdb before using it in any custom functions.)

You need to use it like this.

global $wpdb;
//do something with it.

answered Jun 20, 2013 at 14:20

Achrome

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3 Comments

koala Over a year ago

I forgot to mention that I declared that variable already...But in my case it's not a function, I just redirect to a page which reads my $_POST variables, do I need make a function for it and hook it in some kind of way?

Achrome Over a year ago

It would be good if you just post the relevant code instead of us guessing. :)

koala Over a year ago

I don't have the code with me now, but I was planning to do that when I'm at the computer where the code is on ;)

Jelmer Keij · Accepted Answer · 2013-06-20 14:21:00Z

2

Do you have your $wbdb global? I know it's not very good practice to use global but most Wordpress plugins seem to work this way...

 function myFunction() {
       global $wpdb;
       $wpdb->insert(...);
    }

answered Jun 20, 2013 at 14:21

Jelmer Keij

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1 Comment

koala Over a year ago

I forgot to mention that I declared that variable already...But in my case it's not a function, I just redirect to a page which reads my $_POST variables, do I need make a function for it and hook it in some kind of way?

Vaibhav · Accepted Answer · 2019-06-22 11:09:53Z

0

you can include wp-config file like this include('../../../wp-config.php'); it works for me. here my folder's directory structure is F:\wamp64\www\Wordpress\custom_plugin_development\wp-content\plugins\CRUD-Plugin

answered Jun 22, 2019 at 11:09

Vaibhav

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