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Pinboard API Client in PHP

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README.md

Pinboard API Client in PHP

This library implements a client for the Pinboard API. All of the XML juggling is abstracted away, so that you can work with native PHP arrays and objects. Currently, all features of API v1 are supported.

This library requires PHP 5 with the cURL extension. SSL support must be enabled. This library also requires SimpleXML, which is enabled by default in most PHP 5 installations.

This library is released under the MIT License. The author is not affiliated with Pinboard in any way except as a customer.

Getting Started

Bootstrap:

include 'pinboard-api.php';
$pinboard = new PinboardAPI('username', 'password');

Create a new bookmark:

$bookmark = new PinboardBookmark;
$bookmark->url = 'https://pinboard.in/';
$bookmark->title = 'Pinboard';
$bookmark->description = 'An awesome bookmarking service';
$bookmark->tags = array('awesome', 'bookmarking');
$bookmark->save();

Find and edit an existing bookmark:

$bookmarks = $pinboard->search_by_url('https://delicious.com/');
if (count($bookmarks)) {
    $bookmark = $bookmark[0];
    $bookmark->description = 'Not so tasty anymore';
    $bookmark->tags[] = 'not-awesome'
    $bookmark->save();
}

Delete a bookmark:

$bookmark->delete();

Get a list of your tags:

$tags = $pinboard->get_tags();
foreach ($tags as $tag) {
    echo "Tag '{$tag}' has {$tag->count} bookmarks.\n";
}

Classes and Methods

The Pinboard API Client is liberal in what it accepts but conservative in what it produces. Timestamps and tags are accepted in various formats, and a full PinboardBookmark object can often be replaced with just a URL. However, timestamps returned by the API Client will always be Unix timestamps (except in the case of get_dates() where you'll get dates in the YYYY-MM-DD format), and tags will always be strings in an array.

PinboardAPI->__construct()

Arguments:

  • required $user : your Pinboard username.
  • required $pass : your Pinboard password.
  • optional $connection_timeout : connection timeout in seconds. Default is 10.
  • optional $request_timeout : request timeout in seconds. Default is 30.

PinboardAPI->enable_logging()

Use this method if you would like to get notified every time the API Client makes a remote request. This can be useful for debugging.

Arguments:

  • required $func : a callable that takes one argument.

The callable can be either a function name, a method name, or a closure. It will be passed the remote URL whenever the API Client makes a request to Pinboard.

The following example will print https://api.pinboard.in/v1/posts/update to the console.

$pinboard = new PinboardAPI('username', 'password');
$pinboard->enable_logging(function($str) { echo "$str\n"; });
$updated_time = $pinboard->get_updated_time();

PinboardAPI->get_updated_time()

Use this method to find out when you last made changes to your bookmarks. This can help reduce unnecessary calls to expensive methods such as get_all().

API Method Call: posts/update

Arguments: none.

Returns: integer (Unix timestamp).

PinboardAPI->get_recent()

Use this method to grab your most recent bookmarks, optionally filtered by up to three tags. Note that Pinboard may impose rate limiting on this method.

API Method Call: posts/recent

Arguments:

  • optional $count : integer, how many bookmarks to return. Default is 15. Maximum is 100.
  • optional $tags : an array of 1-3 tags, or a string with spaces between tags.

Returns: an array of PinboardBookmark objects.

PinboardAPI->get_all()

Use this method to grab all of your bookmarks, optionally filtered by up to three tags or a time interval. Note that Pinboard may impose rate limiting on this method.

If you would like to skip any arguments, use null in place of the missing argument.

API Method Call: posts/all

Arguments:

  • optional $count : integer, how many bookmarks to return. Default is all.
  • optional $offset : integer, when used with $count, how many bookmarks to skip.
  • optional $tags : an array of 1-3 tags, or a string with spaces between tags.
  • optional $from : a Unix timestamp, or any string that PHP can parse into a timestamp.
  • optional $to : a Unix timestamp, or any string that PHP can parse into a timestamp.

Returns: an array of PinboardBookmark objects.

PinboardAPI->get()

Use this method to grab some of your bookmarks, optionally filtered by up to three tags. Please read Pinboard's documentation for details on how this method behaves when the date argument is absent.

If you would like to skip any arguments, use null in place of the missing argument.

API Method Call: posts/get

Arguments:

  • optional $url : the exact URL of the bookmark to look for.
  • optional $tags : an array of 1-3 tags, or a string with spaces between tags.
  • optional $date : a Unix timestamp, any string that PHP can parse into a timestamp, or a date in the format YYYY-MM-DD.

Returns: an array of PinboardBookmark objects.

PinboardAPI->search_by_url()

A shortcut to get(). Note that this method will return an array even if there is only one bookmark.

Arguments:

  • required $url : the exact URL of the bookmark to look for.

Returns: an array of PinboardBookmark objects.

PinboardAPI->search_by_tag()

A shortcut to get_all().

Arguments:

  • required $tags : an array of 1-3 tags, or a string with spaces between tags.

Returns: an array of PinboardBookmark objects.

PinboardAPI->search_by_date()

A shortcut to get().

Arguments:

  • required $date : a Unix timestamp, any string that PHP can parse into a timestamp, or a date in the format YYYY-MM-DD.

Returns: an array of PinboardBookmark objects.

PinboardAPI->search_by_interval()

A shortcut to get_all().

Arguments:

  • required $from : a Unix timestamp, or any string that PHP can parse into a timestamp.
  • required $to : a Unix timestamp, or any string that PHP can parse into a timestamp.

Returns: an array of PinboardBookmark objects.

PinboardAPI->save()

Use this method to add a new bookmark or edit an existing bookmark.

API Method Call: posts/add

Arguments:

  • required $bookmark : a PinboardBookmark object to save.
  • optional $replace : set to false if you don't want to overwrite an existing bookmark with the same URL. Default is true.

Returns: true on success and false on failure. Call get_last_status() to read the error message in case of a failure.

When not using $replace, it may be more intuitive to use PinboardBookmark->save() instead. See below for more information on using this alternative syntax.

PinboardAPI->delete()

Use this method to delete a bookmark.

API Method Call: posts/delete

Arguments:

  • required $bookmark : a PinboardBookmark object, or a URL.

Returns: true on success and false on failure. Call get_last_status() to read the error message in case of a failure.

Note that it may be more intuitive to use PinboardBookmark->delete() instead. See below for more information on using this alternative syntax.

PinboardAPI->get_dates()

Use this method to get a list of dates on which you added bookmarks, with the number of bookmarks for each day. Optionally filtered by up to three tags.

API Method Call: posts/dates

Arguments:

  • optional $tags : an array of 1-3 tags, or a string with spaces between tags.

Returns: an array of PinboardDate objects. (These objects behave like strings.)

PinboardAPI->get_suggested_tags()

Use this method to get tag suggestions for a bookmark or URL.

API Method Call: posts/suggest

Arguments:

  • required $bookmark : a PinboardBookmark object, or a URL.

Returns: an associative array with two keys, popular and recommended, each of which contains an array of strings.

PinboardAPI->get_tags()

Use this method to get a list of all your tags, with the number of bookmarks for each tag.

API Method Call: tags/get

Arguments: none.

Returns: an array of PinboardTag objects. (These objects behave like strings.)

PinboardAPI->rename_tag()

Use this method to rename one tag to another.

API Method Call: tags/rename

Arguments:

  • required $old : the old name, as a string.
  • required $new : the new name, as a string.

Returns: true on success and false on failure. Call get_last_status() to read the error message in case of a failure.

PinboardAPI->delete_tag()

Use this method to delete a tag. Bookmarks will not be deleted.

API Method Call: tags/delete

Arguments:

  • required $tag : the tag to delete, as a string.

Returns: true on success and false on failure. Call get_last_status() to read the error message in case of a failure.

PinboardAPI->get_rss_token()

Use this method to get your secret RSS token.

API Method Call: user/secret

Arguments: none.

Returns: a string containing your RSS token.

PinboardAPI->get_last_status()

Use this method to retrieve any error message for one of the following methods: save(), delete(), rename_tag(), and delete_tag(). If the last operation did not fail, this method will return "done". If no applicable operation has been performed, this method will return null.

Arguments: none.

Returns: a string containing the last error message, or null.

PinboardAPI->dump()

Use this method to back up all of your bookmarks. The dump will be produced in an XML format that can be easily imported into Pinboard, Delicious, or any other online bookmarking service that supports importing bookmarks in the Delicious format. Note that Pinboard may impose rate limiting on this method.

API Method Call: posts/all

Arguments: none.

Returns: a string containing the XML dump.

The PinboardBookmark class

This class is used with save() and several other methods that take bookmarks as an argument. Its use is required when calling save(), but in most other cases it can be substituted with just a URL. The API Client will also return instances of this class whenever it fetches bookmarks from Pinboard.

The following properties can be adjusted freely:

  • required url : the URL of the bookmark.
  • required title : the title of the bookmark.
  • optional description : any additional description.
  • optional timestamp : a Unix timestamp, or any string that PHP can parse into a timestamp.
  • optional tags : an array of 1-3 tags, or a string with spaces between tags.
  • optional is_public : true or false. Default is determined by your Pinboard account settings.
  • optional is_unread : true or false. Default is false.

The following properties are also public, but they will not be saved when you call save():

  • hash : an MD5 hash of the URL that Pinboard uses to uniquely identify bookmarks.
  • meta : another hash that can be used to detect when a bookmark is changed.
  • others : the number of other Pinboard users who have bookmarked the same URL.

The following methods are available:

  • save() : save this bookmark.
  • delete() : delete this bookmark.

You can use these methods instead of PinboardAPI->save($bookmark) and PinboardAPI->delete($bookmark) to save or delete individual bookmarks. This may be more intuitive to developers who are used to common ORM idioms, which this library tries to mimic.

For example, instead of:

$pinboard->save($bookmark);

You can simply do:

$bookmark->save();

If only one instance of PinboardAPI exists in the current script (which will usually be the case), the API Client automatically uses it to save or delete all bookmarks, even newly created ones. So there is no need for PinboardBookmark instances to interact explicitly with PinboardAPI instances.

However, if you create multiple instances of PinboardAPI using different login credentials (perhaps because you want to copy or move bookmarks from one Pinboard account to another), these methods will throw PinboardException because they don't know which instance to use. In that case, you should use the equivalent methods on PinboardAPI instances instead, or pass the appropriate PinboardAPI instance as an argument to save() and delete(). Both methods take one optional argument, which should be a PinboardAPI instance.

The following example copies bookmarks from one Pinboard account to another:

$pinboard1 = new PinboardAPI('user1', 'pass1');
$pinboard2 = new PinboardAPI('user2', 'pass2');
$bookmarks = $pinboard1->search_by_tag('tag');
foreach ($bookmarks as $bookmark) {
    $bookmark->save($pinboard2);  // Equivalent to $pinboard2->save($bookmark);
    sleep(3);  // Comply with Pinboard's rate limiting policy
}

Even when using multiple instances, bookmarks that were retrieved using one of the get_* or search_* methods will remember which instance they came from, and therefore save() and delete() will work without any problem, as shown in the following example:

$pinboard1 = new PinboardAPI('user1', 'pass1');
$pinboard2 = new PinboardAPI('user2', 'pass2');
$bookmarks = $pinboard1->search_by_url('http://awesome-website.com/');
$bookmark = $bookmarks[0];
$bookmark->description = 'New description';
$bookmark->save();  // Automatically saved to $pinboard1

The PinboardDate class

Instances of this class are returned by get_dates(). They contain dates in the format YYYY-MM-DD. For all intents and purposes, these objects can be used exactly like strings. The only difference is that it has a count property, which contains the number of bookmarks added on the corresponding date.

Examples:

echo $date;         // prints '2012-03-20'
echo $date->date;   // prints '2012-03-20'
echo $date->count;  // prints '16'

The PinboardTag class

Instances of this class are returned by get_tags(). For all intents and purposes, these objects can be used exactly like strings. The only difference is that it has a count property, which contains the number of bookmarks added on the corresponding date.

In order to conserve resources, this class is not used in other contexts, such as the tags property of PinboardBookmark objects, the output of get_suggested_tags(), or any other situation where the count is not relevant.

Examples:

echo $tag;         // prints 'awesome'
echo $tag->tag;    // prints 'awesome'
echo $tag->count;  // prints '42'

Error Handling

The Pinboard API Client defines the following exceptions:

  • PinboardException (extends Exception) is thrown in all error situations not covered by the other exceptions, such as attempting to save a bookmark with an invalid URL or an empty title.
  • PinboardException_ConnectionError (extends PinboardException) is thrown if the library encounters problems while connecting to Pinboard's servers. This is most likely due to some sort of outage.
  • PinboardException_TooManyRequests (extends PinboardException) is thrown if the server responds with HTTP code 429, "Too Many Requests". This means that you should slow down and wait a few minutes before making additional calls to get() or get_all(). See here and here for more information on rate limiting.
  • PinboardException_InvalidResponse (extends PinboardException) is thrown if the server responds with any HTTP code other than 200 and 429, or if it returns invalid XML.

Note that some methods will return false instead of throwing an exception on failure. This is because the author has judged that errors in those cases are not "exceptional". (For example, it is harmless to try to delete a bookmark that has already been deleted.) All such cases are clearly documented above.

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