PHP yield Keyword

Use yield to create a generator function:

<?php
function countTo3() {
yield "1";
yield "2";
yield "3";
}

foreach(countTo3() as $number) {
echo $number;
echo "<br>";
}
?>

Definition and Usage

The yield keyword is used to create a generator function. Generator functions act as iterators which can be looped through with a foreach loop.

The value given by the yield keyword is used as a value in one of the iterations of the loop.

The foreach keyword.

The yield from keyword.