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 could be used as a type declaration. An iterable type can be used in Foreach and with yield from within a generator.
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 could be used as a type declaration. An iterable type can be used in Foreach and with yield from within a generator.
Functions declaring iterable as a return type may also be generators.
Iterable generator return type example
<?php
function gen(): iterable {
yield 1;
yield 2;
yield 3;
}
foreach(gen() as $value) {
echo $value, "\n";
}
?>