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@ 2017-06-30T17:30:20Z

<?php
if (PHP_VERSION !== '7.1.6') die('Meh');

function kv(& $a) {
    $b = $a;
    end($b);
    $kv = [$k = key($b), current($b)];
    // unset($b); // TRICKY: We must unset $b before modifying $a to avoid copy-on-write for $a.
    unset($a[$k]);
    return $kv;
}

$a = range(1, 2000000);
next($a); next($a);

echo current($a) . PHP_EOL;
var_dump($a);
var_dump(kv($a));
echo current($a) . PHP_EOL;
var_dump($a);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
end: documentation ( source)
key: documentation ( source)
range: documentation ( source)
next: documentation ( source)
current: documentation ( source)

preferences:dark modelive preview

52.05 ms | 402 KiB | 5 Q