Wire::addHookAfter() method

Add a hook to be executed after the hooked method

  • Use an "after" hook when you have code that should execute after a hookable method executes.
  • One benefit of using an "after" hook is that you can have it modify the return value.

Example

// Attach hook to a method in current object
$this->addHookAfter('Page::path', $this, 'yourHookMethodName');

// Attach hook to an inline function
$this->addHookAfter('Page::path', function($event) { ... });

// Attach hook to a procedural function
$this->addHookAfter('Page::path', 'your_function_name');

// Attach hook from single object instance ($page) to inline function
$page->addHookAfter('path', function($event) { ... });

Usage

// basic usage
$string = $wire->addHookAfter($method, $toObject);

// usage with all arguments
$string = $wire->addHookAfter($method, $toObject, $toMethod = null, array $options = []);

Arguments

NameType(s)Description
methodstring, array

Method to hook in one of the following formats (please omit 3 leading underscores):

  • Class::method - If hooking to all object instances of the class.
  • method - If hooking to a single object instance.
  • Since 3.0.137 it may also be multiple methods to hook in CSV string or array.
toObjectobject, null, callable

Specify one of the following:

  • Object instance to call $toMethod from (like $this).
  • Inline function (closure) if providing implemention inline.
  • Procedural function name, if hook is implemented by a procedural function.
  • Null if you want to use the 3rd argument and don't need this argument.
toMethod (optional)string, array

Method from $toObject, or function name to call on a hook event. This argument can be sustituted as the 2nd argument when the 2nd argument isn't needed, or it can be the $options argument.

options (optional)array

Array of options that can modify behavior:

  • type (string): May be either 'method' or 'property'. If property, then it will respond to $obj->property rather than $obj->method(). The default type is 'method'.
  • priority (int): A number determining the priority of a hook, where lower numbers are executed before higher numbers. The default priority is 100.

Return value

string

A special Hook ID (or CSV string of hook IDs) that should be retained if you need to remove the hook later.


Wire methods and properties

API reference based on ProcessWire core version 3.0.137

Twitter updates

  • New post: This week we’ll take a look at a new version of FormBuilder that's on the way (with a screencast), as well as the latest version of the core: ProcessWire 3.0.140— More
    6 September 2019
  • We added WebP image support this year and many have been adopting it in existing projects. We look at a process used for migrating existing websites to WebP images— from preliminary considerations to implementation & testing, w/lots of tips & tricks too: More
    16 August 2019
  • Core version 3.0.137 on the dev branch adds the ability to hook multiple methods at once, in a single call. This post details how it works and provides a useful example of how you might put it to use in your development environment— More
    2 August 2019

Latest news

  • ProcessWire Weekly #279
    This week in the 279th issue of ProcessWire Weekly we're going to introduce some of the latest third party modules out there, and highlight a brand new site of the week. Read on!
    Weekly.pw / 14 September 2019
  • ProcessWire 3.0.140 and FormBuilder v40
    This week we’ll take a look at a new version of FormBuilder that's on the way (with a screencast), as well as the latest version of the core: ProcessWire 3.0.140.
    Blog / 6 September 2019
  • Subscribe to weekly ProcessWire news

I just love the easy and intuitive ProcessWire API. ProcessWire rocks!” —Jens Martsch, Web developer