I'm trying to develop a code to call some Codex functions (https://codex.wordpress.org/Function_Reference) the problem is simple, I don't find any doc where read about how to start.
I have a PHP file with this line for example:
<?php
$website = "http://example.com";
$userdata = array(
'user_login' => 'login_name',
'user_url' => $website,
'user_pass' => NULL // When creating an user, `user_pass` is expected.
);
$user_id = wp_insert_user( $userdata ) ;
//On success
if ( ! is_wp_error( $user_id ) ) {
echo "User created : ". $user_id;
}
?>
Where I need to put this code to check if works? Where I need to call it? Must I create a plugin? Can I call those functions from a script in a specific folder?
For example, the funcion wp_insert_user is in /wp-includes/user.php, can I call the function just including the script?
include('user.php')
Where are the rest of the functions?
Someone knows an specific manual with a simple doc? I'm getting crazy.
This is my first script for a CMS and I don't undertand how it works, but I dont find manuals or simple doc.