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@ 2015-10-27T03:01:59Z

<?php
$arr1 = [1,2,3];
$arr2 = $arr1;

xdebug_debug_zval('arr2');
key($arr2);
xdebug_debug_zval('arr2');

unset($arr1);
unset($arr2);

$arr1 = [1,2,3];
$arr2 = $arr1;

xdebug_debug_zval('arr2');
end($arr2);
xdebug_debug_zval('arr2');

Output
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end: documentation ( source)
key: documentation ( source)

preferences:dark modelive preview

52.21 ms | 402 KiB | 5 Q