function MapInterface::putIfAbsent

Associates the specified value with the specified key in this map only if it is not already set.

If there is already a value associated with `$key`, this returns that value without replacing it.

Parameters

K $key The key to put in the map.:

T $value The value to store at `$key`.:

Return value

T | null the previous value associated with key, or `null` if there was no mapping for `$key`.

1 method overrides MapInterface::putIfAbsent()

AbstractMap::putIfAbsent in vendor/ramsey/collection/src/Map/AbstractMap.php

File

vendor/ramsey/collection/src/Map/MapInterface.php, line 92

Class

MapInterface

An object that maps keys to values.

Namespace

Ramsey\Collection\Map

Code

public function putIfAbsent(int|string $key, mixed $value) : mixed;