PHP Generators Re-writing randomNumbers() using a generator
Example
Our randomNumbers() function can be re-written to use a generator.
<?php
function randomNumbers(int $length)
{
for ($i = 0; $i < $length; $i++) {
// yield tells the PHP interpreter that this value
// should be the one used in the current iteration.
yield mt_rand(1, 10);
}
}
foreach (randomNumbers(10) as $number) {
echo "$number\n";
}
Using a generator, we don't have to build an entire list of random numbers to return from the function, leading to much less memory being used.
