composer require mkoubik/sloth
<?php
use Sloth\LazyString;
$string = new LazyString(fn () => 'Hello world!');
echo $string; // callback is called at this point
echo $string; // callback is not called any more<?php
use Sloth\LazyIterator;
$iterator = new LazyIterator(fn () => range(1, 9999));
foreach ($iterator as $number) { // callback is called at this point
echo $number . "\n";
}
echo count($iterator); // works too<?php
use Sloth\LazyAccessor;
$person = new LazyAccessor(fn () => new Person('John Doe'));
echo $person->name; // callback is called at this point
if (isset($person->name)) {
unset($person->name);
}
echo $person->setName('John Doe');