$iterator->keyOf()
Tries to find the key for the given element
$iterator->keyOf(mixed $needle): int|string|falseParameters
| Name | Type | Default | Description |
|---|---|---|---|
| $needlerequired | mixed |
no default value | the element to search for |
Return types
intorstringorfalse
the name of the key or false
This method modifies the existing $iterator object it is applied to and returns it again.