$cache API variable / WireCache class

Provides easy, persistent caching of markup, strings, arrays or PageArray objects.

// Get a cache named 'foo' that lasts for 1 hour (aka 3600 seconds)
$value = $cache->get('foo', 3600, function() {
  // this is called if cache expired or does not exist,
  // so generate a new cache value here and return it
  return "This is the cached value";
});

Click any linked item for full usage details and examples. Hookable methods are indicated with the icon. In addition to those shown below, the WireCache class also inherits all the methods and properties of: Wire.

Show $var?             Show args?        

Advanced

NameReturnSummary 
$cache->getInfo()
arrayGet information about all the caches in this WireCache 
$cache->maintenance()
boolCache maintenance removes expired caches 
$cache->preload(array $names)
(nothing)Preload the given caches, so that they will be returned without query on the next get() call 
$cache->preloadFor($ns)
(nothing)Preload all caches for the given object or namespace 

Constants

These constants are used for the $expire argument of get() and save() cache methods.

NameReturnSummary 
WireCache::expireDaily const86400Cache should expire once per day 
WireCache::expireHourly const3600Cache should expire once per hour 
WireCache::expireMonthly const2419200Cache should expire once per month 
WireCache::expireNever const2010-04-08 03:10:10Cache should never expire (unless manually cleared). 
WireCache::expireNow const0Cache should expire now 
WireCache::expireReserved const2010-04-08 03:10:01Cache should never expire and should not be deleted during deleteAll() calls (for PW internal system use) Can only be deleted by delete() calls that specify it directly or match it specifically with a wildcard. 
WireCache::expireSave const2010-01-01 01:01:01Cache should expire when a given resource (Page or Template) is saved. 
WireCache::expireWeekly const604800Cache should expire once per week 

Additional methods and properties

In addition to the methods and properties above, WireCache also inherits the methods and properties of these classes:

API reference based on ProcessWire core version 3.0.185

Twitter updates

  • ProcessWire 3.0.185 (dev) core updates, plus new Session Allow module— More
    17 September 2021
  • Three new ProcessWire Textformatter modules: Find/Replace, Markdown in Markup, and Emoji— More
    3 September 2021
  • This week we have a new master version released after a year in the making. With nearly 40 pull requests, hundreds of new additions and more than 100 issue reports resolved, this new version has a ton of great new stuff— More
    27 August 2021

Latest news

  • ProcessWire Weekly #388
    In the 388th issue of ProcessWire Weekly we'll check out the latest core update, introduce two new third party modules, and more. Read on!
    Weekly.pw / 16 October 2021
  • ProcessWire 3.0.184 new master/main version
    This week we have a new master/main version released after a full year in the making. As you might imagine, this new version has a ton of great new stuff and we’ll try to cover much of it here.
    Blog / 27 August 2021
  • Subscribe to weekly ProcessWire news

“…building with ProcessWire was a breeze, I really love all the flexibility the system provides. I can’t imagine using any other CMS in the future.” —Thomas Aull