3v4l.org

run code in 500+ PHP versions simultaneously
<?php // storage class, PHP 8.3 needed class LazyValue { public function __construct(private Closure $lazy){} public function getValue() { static $value = ($this->lazy)(); return $value; } } // use $l1 = new LazyValue(function () { echo "slow\n"; return "42\n"; }); echo $l1->getValue(); echo $l1->getValue(); echo $l1->getValue();
Output for git.master, git.master_jit
slow 42 42 42

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

preferences:
63.03 ms | 778 KiB | 4 Q