WireArray::callUnknown() method

Handler for when an unknown/unhooked method call is executed

If interested in hooking this, please see the Wire::callUnknown() method for more details on the purpose and potential hooking implementation of this method.

The implementation built-in to WireArray provides a couple of handy capabilities to all WireArray derived classes (assuming that $items is an instance of any WireArray):

  • It enables you to call $items->foobar() and receive a regular PHP array containing the value of the "foobar" property from each item in this WireArray. It is equivalent to calling $items->explode('foobar'). Of course, substitute "foobar" with the name of any property present on items in the WireArray.

  • It enables you to call $items->foobar(", ") and receive a string containing the value of the "foobar" property from each item, delimited by the string you provided as an argument (a comma and space ", " in this case). This is equivalent to calling $items->implode(", ", "foobar").

  • Also note that if you call $items->foobar(", ", $options) where $options is an array, it is equivalent to $items->implode(", ", "foobar", $options).

Example

// Get array of all "title" values from each item 
$titlesArray = $items->title();

// Get a newline separated string of all "title" values from each item
$titlesString = $items->title("\n"); 

Usage

$mixed = $wireArray->callUnknown(string $method, array $arguments);

Arguments

NameType(s)Description
methodstring

Requested method name

argumentsarray

Arguments provided to the method

Return value

null mixed

Exceptions

Method can throw exceptions on error:

  • WireException


Hooking WireArray::callUnknown(…)

You can add your own hook events that are executed either before or after the WireArray::callUnknown(…) method is executed. Examples of both are included below. A good place for hook code such as this is in your /site/ready.php file.

Hooking before

The 'before' hooks are called immediately before each WireArray::callUnknown(…) method call is executed. This type of hook is especially useful for modifying arguments before they are sent to the method.

$this->addHookBefore('WireArray::callUnknown', function(HookEvent $event) {
  // Get the object the event occurred on, if needed
  $WireArray = $event->object;

  // Get values of arguments sent to hook (and optionally modify them)
  $method = $event->arguments(0);
  $arguments = $event->arguments(1);

  /* Your code here, perhaps modifying arguments */

  // Populate back arguments (if you have modified them)
  $event->arguments(0, $method);
  $event->arguments(1, $arguments);
});

Hooking after

The 'after' hooks are called immediately after each WireArray::callUnknown(…) method call is executed. This type of hook is especially useful for modifying the value that was returned by the method call.

$this->addHookAfter('WireArray::callUnknown', function(HookEvent $event) {
  // Get the object the event occurred on, if needed
  $WireArray = $event->object;

  // An 'after' hook can retrieve and/or modify the return value
  $return = $event->return;

  // Get values of arguments sent to hook (if needed)
  $method = $event->arguments(0);
  $arguments = $event->arguments(1);

  /* Your code here, perhaps modifying the return value */

  // Populate back return value, if you have modified it
  $event->return = $return;
});

WireArray methods and properties

API reference based on ProcessWire core version 3.0.148

Twitter updates

  • This week we’ve got a few new and interesting core updates in progress, though none quite ready to release just yet. So rather than releasing version 3.0.154 today, I thought we'd instead take a brief look at what’s coming over the next few weeks… More
    3 April 2020
  • ProcessWire 3.0.153 (dev) focuses on comments field updates, significant refactoring/improvements to ProcessWire’s core Template class and PagesLoader class (which is used by the pages API variable), and we introduce a useful new pages API method— More
    20 March 2020
  • ProcessWire 3.0.152 core updates— This week we have some major improvements to our core date/time Inputfield, as well as a new ability to specify your own custom classes for Page objects— More
    6 March 2020

Latest news

  • ProcessWire Weekly #308
    In the 308th issue of ProcessWire Weekly we're going to take a look at some upcoming core and pro module updates, check out two all-new third party modules, and more. Read on!
    Weekly.pw / 4 April 2020
  • ProcessWire updates and additions in progress
    This week we’ve got a few new and interesting core updates in progress, though none quite ready to release just yet. So rather than releasing version 3.0.154 today, I thought we'd instead take a brief look at what’s coming over the next few weeks. This post covers all the details.
    Blog / 3 April 2020
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