How to create a Web API service in PHP?

SOAP and REST API are widely used APIs.

Considering the existence of a PHP class called manage.php, it helps in managing entries in the database.

class manage { private $entryId; function __construct($entryId) {
   $this->entryId = $entryId;
} function deleteEntry() {
   //delete $this->entryId from database
}}

On the server, this functionality can be accessed as follows -

require_once('manage.php');
$m = new manage(12);
$m->deleteEntry();

How to access it by different servers? A third file can be created that behaves like a buffer/interface that facilitates access to this data. Below is an example buffer -

Let's call it "api/delete.php"

require_once('manage.php');
if(hasPermission($_POST['api_key']) {
   $m = new manage($_POST['entry_id']);
   $m->deleteEntry();
}

The user can request the buffer located at http://example.com/api/delete.php The server sends a POST request with api_key and entry_id.

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