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<?php $array = ['a', 'b', 'c', 'd']; $array[3] = null; echo "is_null -> 5 "; var_dump(is_null($this->params[5])); // [1] true echo "is_null -> 3 "; var_dump(is_null($this->params[3])); // [2] true echo "isset -> 5 "; var_dump(isset($this->params[5])); // [3] false echo "isset -> 3 "; var_dump(isset($this->params[3])); // [4] false echo "count "; var_dump(count($this->params)); // [5] 4 print_r($array); // [6]
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