PHP易錯面試題收集-持續更新

<?phpnnclass SomeClassn{n private $properties = [];n public function __set($name, $value)n {n $this->properties[$name] = $value;n }n public function __get($name)n {n return $this->properties[$name];n }n}nnn$obj = new SomeClass();n$obj->name = phpgod;n$obj->age = 2;n$obj->gender = male;nnvar_dump($obj->name);n//output:string(6) "phpgod"nvar_dump(isset($obj->name));n//output:bool(false)，你的答案對了嗎？為什麼n

<?phpn //第2題：n $arr = [1,2,3];n foreach($arr as &$v) {n //nothing todo.n }n foreach($arr as $v) {n //nothing todo.n }n var_export($arr);n //output:array(0=>1,1=>2,2=>2)，你的答案對了嗎？為什麼n?>n

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