【PHP学习笔记】基于反射的数组转实体对象方案
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2022-06-15 12:09:50
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最近有个需求,要把数据库里查出来的数据转成对应的实体对象(自定义的实体对象)
php数组转对象网上提供了一个这样的方法
function array_to_object($arr)
{
if (gettype($arr) != 'array') {
return;
}
foreach ($arr as $k => $v) {
if (gettype($v) == 'array' || getType($v) == 'object') {
$arr[$k] = (object)array_to_object($v);
}
}
return (object)$arr;
}
$arr = ['name' => "aa", "id" => 3, "age" => ['name' => "aa", "id" => 3, "age" => 2]];
var_dump(array_to_object($arr));
能转没毛病,,但是php的数组转对象貌似可以更简单更通俗(json序列化,再json反序列化成对象)
var_dump(json_decode(json_encode($arr)));
这仅仅是数组转对象的方案,,想转实体对象(自己定义的对象)还需要用反射,下面提供简单实例:
/**
* 测试类Student
* Class Student
*/
class Student
{
private $name;
private $id;
/**
* @return mixed
*/
public function getName()
{
return $this->name;
}
/**
* @param mixed $name
*/
public function setName($name): void
{
$this->name = $name;
}
/**
* @return mixed
*/
public function getId()
{
return $this->id;
}
/**
* @param mixed $id
*/
public function setId($id): void
{
$this->id = $id;
}
}
/**
* 【1】反射创建类的操作对象,$reflectionClass
* 【2】创建临时代理对象$obj
* 【3】将参数逐一赋值给$obj
* 【4】那么此时的$obj就是数组对应的实体类(此处不包含嵌套,只支持简单对象转)
* @param array $arr
* @param string $className
*
* @return object
* @throws ReflectionException
*/
function arrayToSimpleObj(array $arr, string $className)
{
$reflectionClass = new ReflectionClass($className);
$obj = $reflectionClass->newInstance();
foreach ($arr as $key => $value) {
$property = $reflectionClass->getProperty($key);
$property->setAccessible(true);//私有属性需要设置允许访问
$property->setValue($obj, $value);
}
return $obj;
}
$arr = ['name' => "aa", "id" => 3];
try {
var_dump(arrayToSimpleObj($arr, Student::class));
} catch (ReflectionException $e) {
echo "转换失败";
}
$arr = ['name' => "aa", "id" => 3, "age" => 2];
try {
var_dump(arrayToSimpleObj($arr, Student::class));
} catch (ReflectionException $e) {
echo "转换失败";
}