$page->isChanged() method

Has the Page changed since it was loaded?

To check if only a specific property on the page has changed, specify the property/field name as the first argument. This method assumes that change tracking is enabled for the Page (as it is by default). Pages that are new (i.e. don't yet exist in the database) always return true.

Examples

// Check if page has any changes
if($page->isChanged()) {
  // There are changes to this page
  $changes = $page->getChanges();
}
// When page is about to be saved, update summary when body has changed
$this->addHookBefore('Pages::saveReady', function($event) {
  $page = $event->arguments('page');
  if($page->isChanged('body')) {
    // get first 300 chars from body
    $summary = substr($page->body, 0, 300);
    // truncate to position of last period
    $period = strrpos($summary, '.');
    if($period) $summary = substr($summary, 0, $period);
    // populate to the page, so that summary is also saved
    $page->summary = $summary;
  }
});

Usage

// basic usage
$bool = $page->isChanged();

// usage with all arguments
$bool = $page->isChanged(string $what = '');

Arguments

NameType(s)Description
what (optional)string

If specified, only checks the given property for changes rather than the whole page.

Return value

bool

True if property has changed, false if not.

See Also


$page methods and properties

API reference based on ProcessWire core version 3.0.178

Twitter updates

  • Today a new version of FormBuilder has been released in the FormBuilder support board (our 50th version) and it has a lot of interesting new features, which we’ll take a closer look at in this post— More
    11 June 2021
  • ProcessWire 3.0.179 adds great new admin theme customization tools that put you in full control over the Uikit admin styles— More
    28 May 2021
  • ProcessWire updates for week of 21 May 2021— More
    22 May 2021

Latest news

  • ProcessWire Weekly #370
    In the 370th issue of ProcessWire Weekly we're going to check out the latest version of the commercial FormBuilder module, introduce a couple of brand new third party modules, and more. Read on!
    Weekly.pw / 12 June 2021
  • ProcessWire FormBuilder v50 updates
    Today a new version of FormBuilder has been released in the FormBuilder support board (our 50th version) and it has a lot of interesting new features, which we'll take a closer look at in this post.
    Blog / 11 June 2021
  • Subscribe to weekly ProcessWire news

“Indeed, if ProcessWire can be considered as a CMS in its own right, it also offers all the advantages of a CMF (Content Management Framework). Unlike other solutions, the programmer is not forced to follow the proposed model and can integrate his/her ways of doing things.” —Guy Verville, Spiria Digital Inc.