Fieldtype::formatValue() method

Format the given value for output and return a string of the formatted value

Page instances call upon this method to do any necessary formatting of a value in preparation for output, but only if output formatting $page->of() is enabled. The most common use of this method is for text-only fields that need to have some text formatting applied to them, like Markdown, SmartyPants, Textile, etc. As a result, Fieldtype modules don't need to implement this unless it's applicable.

Usage

$mixed = $fieldtype->formatValue(Page $page, Field $field, $value);

Arguments

NameType(s)Description
pagePage

Page that the value lives on

fieldField

Field that represents the value

valuestring, int, object

The value to format

Return value

mixed


Hooking Fieldtype::formatValue(…)

You can add your own hook events that are executed either before or after the Fieldtype::formatValue(…) 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 Fieldtype::formatValue(…) method call is executed. This type of hook is especially useful for modifying arguments before they are sent to the method.

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

  // Get values of arguments sent to hook (and optionally modify them)
  $page = $event->arguments(0);
  $field = $event->arguments(1);
  $value = $event->arguments(2);

  /* Your code here, perhaps modifying arguments */

  // Populate back arguments (if you have modified them)
  $event->arguments(0, $page);
  $event->arguments(1, $field);
  $event->arguments(2, $value);
});

Hooking after

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

$this->addHookAfter('Fieldtype::formatValue', function(HookEvent $event) {
  // Get the object the event occurred on, if needed
  $Fieldtype = $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)
  $page = $event->arguments(0);
  $field = $event->arguments(1);
  $value = $event->arguments(2);

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

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

Fieldtype 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
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    20 March 2020
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    6 March 2020

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    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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