PHP Generator Function

basic.php

<?php
// Get number
function get_one_two_three() {
    for ($i = 1; $i <= 3; $i++) {
        yield $i;
    }
}

$result = get_one_two_three();

foreach ($result as $value) {
    echo "$value\n";
}

// Helper
function convert($size)
{
    $unit=array('b','kb','mb','gb','tb','pb');
    return @round($size/pow(1024,($i=floor(log($size,1024)))),2).' '.$unit[$i];
}

echo 'Memory terpakai : ' . convert(memory_get_usage(true));