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run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array(); $a[] = &$a; var_dump($a); $a[0] = 1; var_dump($a); echo "-------------------\n"; $a = array(); $a[] = &$a; //$b = unserialize(serialize($a)); $b =& $a; var_dump($b); $b[0] = 1; var_dump($b);
Output for 5.6.28 - 7.1.0
array(1) { [0]=> &array(1) { [0]=> *RECURSION* } } int(1) ------------------- array(1) { [0]=> &array(1) { [0]=> *RECURSION* } } int(1)