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<?php $nullvar = array( 0 => array('a' => array('r' => null)), 1 => array('a' => array('r' => null)), ); if (isset($nullvar[0]['a']['r'])) { echo "set"; } else { echo "not set"; } if (is_null($nullvar[0]['a']['r'])) { echo "\nnull"; } else { echo "\nnot null"; }
Output for 4.3.0 - 7.1.0
not set null