Zammad API Client for PHP

This client can be used to access the API of the open source helpdesk Zammad via PHP.

Zammad version support

This client supports Zammad 3.4.1 and newer.

Installation

Requirements

The API client needs composer. For installation have a look at its documentation. Additionally, the API client needs PHP 7.2 or newer.

Integration into your project

Add the following to the "require" section of your project's composer.json file:

"zammad/zammad-api-client-php": "2.0.*"

Installing the API client's dependencies

Fetch the API client's code and its dependencies by updating your project's dependencies with composer:

$ composer update

Once installed, you have to include the generated autoload.php into your project's code:

require_once dirname(__DIR__).'/vendor/autoload.php';

How to use the API client

Example code

You can find example code within the directory examples.

The Client object

Your starting point is the Client object:

use ZammadAPIClient\Client;
$client = new Client([
    'url'           => 'https://myzammad.com', // URL to your Zammad installation
    'username'      => 'myuser@myzammad.com',  // Username to use for authentication
    'password'      => 'mypassword',           // Password to use for authentication
    // 'timeout'       => 15,                  // Sets timeout for requests, defaults to 5 seconds, 0: no timeout
    // 'debug'         => true,                // Enables debug output
    // 'verifySsl'     => true,                // Enabled SSL verification. You can also give a path to a CA bundle file. Default is true.
]);

Besides using a combination of username and password, you can alternatively give an http_token or an oauth2_token. Important: You have to activate API access in Zammad.

Fetching a single Resource object

To fetch a Resource object by ID, e. g. a ticket with ID 34, use the Client object:

use ZammadAPIClient\ResourceType;
$ticket = $client->resource( ResourceType::TICKET )->get(34);

$ticket now is a Resource object which holds the data of the ticket and provides all of the methods for setting/getting specific values (like the title of the ticket) and sending changed values to Zammad to update the ticket.

Note: Once you successfully called get on a Resource object, you cannot call it again, instead you have to create a new one with resource.

Accessing values of Resource objects

You can access the values of a Resource object via its 'value' methods.

$ticket->setValue( 'title', 'My ticket title' );
$title = $ticket->getValue('title');
$all_values = $ticket->getValues();

Please note that the API client does not provide checks for nor does it know about the available fields of the Resource objects. If you set or get a value of a non-existing field or set an invalid value, Zammad will ignore it or return an error.

So, how can you know which fields are available? Just fetch an existing Resource object and have a look at the returned fields. A fresh Zammad system always contains an object with ID 1 for every resource type.

Additionally you can have a look at the REST interface documentation of Zammad:

Introduction to the REST interface

• Users
• Groups
• Organizations
• Tickets
  • Ticket articles
  • Ticket priorities
  • Ticket states
• Tags

Fetching a ticket's articles

If you already have a ticket object, you can easily fetch its articles:

$ticket_articles = $ticket->getTicketArticles();

Fetching content of ticket article attachments

The content of ticket article attachments can be fetched with a call of getAttachmentContent() of the ticket article resource object:

$attachment_content = $ticket_article->getAttachmentContent(23);

In the above example 23 is the ID of the attachment. This ID can be found within the attachments array of the ticket article data. Usually you want to loop over this array to fetch the content of all attachments.

Updating Resource objects

If you fetched a Resource object and changed some values, you have to send your changes to Zammad. You do this with a simple call:

$ticket->save();

save() will check it itself but if you somehow need to know if a Resource object has unsaved changes, you can check it with:

if ( $ticket->isDirty() ) {...}

Note: Some resource types don't support updating the values of certain fields. Please refer to the API documentation (see links above).

Creating Resource objects

To create a new Resource object, use the following code (example):

use ZammadAPIClient\ResourceType;

$ticket = $client->resource( ResourceType::TICKET );
$ticket->setValue( 'title', 'My new ticket' );
// ...
// Set additional values
// ...
$ticket->save(); // Will create a new ticket object in Zammad

Searching Resource objects

Some types of resources can be searched, pagination is available.

use ZammadAPIClient\ResourceType;

// Fulltext search
$tickets = $client->resource( ResourceType::TICKET )->search('some text');

// Field specific search
$tickets = $client->resource( ResourceType::TICKET )->search('title:My Title');

// Field specific search with more than one field
$tickets = $client->resource( ResourceType::TICKET )->search('title:My Title AND priority_id:1');

// Pagination: Page 1, 25 entries per page
$tickets = $client->resource( ResourceType::TICKET )->search( 'some text', 1, 25 );

Note that there is a configurable server-side limit for the number of returned objects (e. g. 500). This limit also applies to the number of entries per page. If you call search() with 1000 entries per page and the server-side limit is set to 500, the server-side limit will be applied.

A successful search (which might have zero results) returns an array of objects (or an empty array). If the result is the original caller object, there was an error (see error handling below). Therefore, the code for searching should look like the following:

use ZammadAPIClient\ResourceType;

$tickets = $client->resource( ResourceType::TICKET )->search('some text');
if ( !is_array($tickets) ) {
    // Error handling
    print $tickets->getError();
}
else {
    // Do something with $tickets array
}

Note: You cannot use a Resource object that contains data (either via get, search, all or by setting values on a new object) to execute a search. Use a new Resource object instead.

Fetching 'all' Resource objects

For some types of resources, all available objects can be fetched, pagination is available.

use ZammadAPIClient\ResourceType;

// Fetch all tickets (keep in mind the server-side limit, see 'Searching Resource objects')
$tickets = $client->resource( ResourceType::TICKET )->all();

// Fetch all tickets with pagination (keep in mind the server-side limit, see 'Searching Resource objects'), page 4, 50 entries per page
$tickets = $client->resource( ResourceType::TICKET )->all( 4, 50 );

A successful call of all (which might have zero results) returns an array of objects (or an empty array). If the result is the original caller object, there was an error (see error handling below). Therefore, the code to use all should look like the following:

use ZammadAPIClient\ResourceType;

$tickets = $client->resource( ResourceType::TICKET )->all( 4, 50 ); // pagination
if ( !is_array($tickets) ) {
    // Error handling
    print $tickets->getError();
}
else {
    // Do something with $tickets array
}

Note: You cannot use a Resource object that contains data (either via get, search, all or by setting values on a new object) to execute all. Use a new Resource object instead.

Deleting a Resource object

To be able to delete a Resource object that exists in Zammad, you must first fetch it from Zammad, either via get, all or search. You can also delete a newly created Resource object that has not been sent to Zammad yet. But this should only rarely be necessary because you can simply create a new Resource object via the Client object. To delete a Resource object, simply call delete on it:

$ticket->delete();

This clears the object from all data and if possible deletes it in Zammad. The PHP object itself remains. You can reuse it for another Resource object or simply drop it.

Working with tags

Adding a tag to an object

Zammad can assign tags to an object. Currently this is only supported for ticket objects.

use ZammadAPIClient\ResourceType;

// The third parameter 'Ticket' is the object type for which the ID will be given as first parameter.
$client->resource( ResourceType::TAG )->add( $ticket_id, 'tag 1', 'Ticket' );

Remove a tag from an object

use ZammadAPIClient\ResourceType;

$client->resource( ResourceType::TAG )->remove( $ticket_id, 'tag 1', 'Ticket' );

Getting all tags assigned to an object

use ZammadAPIClient\ResourceType;

// The second parameter 'Ticket' is the object type for which the ID will be given as first parameter.
$tag = $client->resource( ResourceType::TAG )->get( $ticket_id, 'Ticket' );

// [ 'tag 1', 'tag 2' ]
$tags = $tag->getValue('tags')

Search for Tags

use ZammadAPIClient\ResourceType;

$tags = $client->resource( ResourceType::TAG )->search('my tag');

Object import

Besides the usual methods available for objects, there is also a method available to import these via CSV. Example for text module CSV import:

use ZammadAPIClient\ResourceType;

$text_modules_csv_string = file_get_contents('text_modules.csv');

$client->resource( ResourceType::TEXT_MODULE )->import($text_modules_csv_string);

See Available resource types and their access methods below for resource types that support CSV import.

Handling Zammad errors

When you access Zammad, you always will get a Resource object (or an array of such objects) in return, regardless if Zammad returned data or executed your request. In case of errors (e. g. that above ticket with ID 34 does not exist in Zammad), you will get a Resource object with a set error which can be checked with the following code:

if ( $ticket->hasError() ) {
    print $ticket->getError();
}

If you additionally need more detailed information about connection/request errors, you can access the Response object of the Client object. It holds the response of the last request that was made.

$last_response = $client->getLastResponse();

With this object, you can e. g. get the HTTP status code and the body of the last response.

Executing an API call on behalf of another user

If you want Zammad to execute an API call on behalf of another user than the one you used for authentication, use the following code before executing the API call(s):

$client->setOnBehalfOfUser('myuser');

Any API call after above code will use this setting. If you want to return to using the user you used for authentication, call:

$client->unsetOnBehalfOfUser();

Using this setting will be ignored by Zammad before version 2.4.

Available resource types and their access methods

To be able to use the 'short form' for the resource type, add a

use ZammadAPIClient\ResourceType;

to your code. You then can reference the resource type like

$client->resource( ResourceType::TICKET );

Resource type	get	all	search	save	delete	add	remove	import
TICKET	✔	✔	✔	✔	✔	–	–	–
TICKET_ARTICLE	✔	–	✔	✔	✔	–	–	–
TICKET_STATE	✔	✔	–	✔	✔	–	–	–
TICKET_PRIORITY	✔	✔	–	✔	✔	–	–	–
TEXT_MODULE	✔	✔	–	✔	✔	–	–	✔
ORGANIZATION	✔	✔	✔	✔	✔	–	–	✔
GROUP	✔	✔	–	✔	✔	–	–	–
USER	✔	✔	✔	✔	✔	–	–	✔
TAG	✔	–	✔	–	–	✔	✔	–