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@ 2014-04-10T10:26:08Z

<?php

class X {
    var $value;

    function get()
    {
        return null !== $this->value ? $this->value : ($this->value = $this->getLongCalculation());
    }


    function getLongCalculation()
    {
        sleep(1);

        return 5;
    }
}

$x = new X;
var_dump($x->get());
var_dump($x->get());

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
sleep: documentation ( source)

preferences:dark modelive preview

43.4 ms | 402 KiB | 5 Q