<?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');
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