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@ 2018-03-07T06:57:34Z

<?php

$s = new \SplObjectStorage();
$s[new class { function __toString() { return 'x'; }}] = 'a';
$s[new class { function __toString() { return 'y'; }}] = 'b';

foreach ($s as $k => $v) {
    var_dump($k);
}

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)

preferences:dark modelive previewkey bindings

44.79 ms | 404 KiB | 5 Q