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Best practices for using API variables ProcessWire’s API is accessible through API variables and it provides multiple ways to access them. There are benefits and drawbacks to each approach and this post aims to cover them all.
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API Reference
Fields

$fields→getCacheItemName()

Usage

$fields->getCacheItemName();

$fields methods and properties

API reference based on ProcessWire core version 3.0.253

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$fields
applySetupName()
clone()
delete()
findByTag()
findByType()
get()
getAllNames()
getCacheItemName()
getNumPages()
getNumRows()
getTags()
getWireArray()
isNative()
makeItem()
save()
saveFieldgroupContext()

Just for hooks
changeFieldtype()
changeTypeReady()
changedType()
deleteFieldDataByTemplate()

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