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@ 2017-08-29T13:20:08Z

<?php
$x=new GMP(0);
$x=$x+1;
var_dump($x);
var_dump((int)$x);

class a {
    public function __construct($a = null) {
        $this->a =& $a;
    }
    public function __destruct() {
        $this->a = null;
    }
}
$f= new SplFixedArray(5);
$a=[$f];
$f[0]=new a($a);
echo(serialize([$a]));
//var_dump($f);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
serialize: documentation ( source)

preferences:dark modelive preview

27.95 ms | 402 KiB | 5 Q