Iterables

Iterable is a built-in compile time type alias for array|Traversable . From its introduction in PHP 7.1.0 and prior to PHP 8.2.0, iterable was a built-in pseudo-type that acted as the aforementioned type alias and can be used as a type declaration. An iterable type can be used in foreach and with yield from within a generator .

Note :

Functions declaring iterable as a return type may also be generators .

Example #1 Iterable generator return type example

<?php


function guen (): iterable {
yield 1 ;
yield 2 ;
yield 3 ;
}

foreach( guen () as $value ) {
echo $value , "\n" ;
}
?>