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run code in 300+ PHP versions simultaneously
<?php $d = new \stdClass(); $d->foo = 'bar'; $d->a = array(array($d, 'blah')); print serialize($d);
Output for git.master, git.master_jit, rfc.property-hooks
O:8:"stdClass":2:{s:3:"foo";s:3:"bar";s:1:"a";a:1:{i:0;a:2:{i:0;r:1;i:1;s:4:"blah";}}}

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