我正在用PHP开发一个Web应用程序,
我需要从服务器传输许多对象作为JSON字符串,是否存在用于将对象转换为JSON和JSON字符串转换为Objec的任何库,如用于Java的Gson库。
答案 0 :(得分:97)
这应该可以解决问题!
// convert object => json
$json = json_encode($myObject);
// convert json => object
$obj = json_decode($json);
这是一个例子
$foo = new StdClass();
$foo->hello = "world";
$foo->bar = "baz";
$json = json_encode($foo);
echo $json;
//=> {"hello":"world","bar":"baz"}
print_r(json_decode($json));
// stdClass Object
// (
// [hello] => world
// [bar] => baz
// )
如果您希望输出为数组而不是对象,请将true
传递给json_decode
print_r(json_decode($json, true));
// Array
// (
// [hello] => world
// [bar] => baz
// )
的更多信息
另请参阅:json_decode()
答案 1 :(得分:20)
为大规模应用程序提供更多可扩展性,使用带有封装字段的oop样式。
简单方法: -
class Fruit implements JsonSerializable {
private $type = 'Apple', $lastEaten = null;
public function __construct() {
$this->lastEaten = new DateTime();
}
public function jsonSerialize() {
return [
'category' => $this->type,
'EatenTime' => $this->lastEaten->format(DateTime::ISO8601)
];
}
}
echo json_encode(new Fruit()); //输出:
{"category":"Apple","EatenTime":"2013-01-31T11:17:07-0500"}
PHP上的Real Gson: -
答案 2 :(得分:5)
json_decode($json, true);
// the second param being true will return associative array. This one is easy.
答案 3 :(得分:1)
我做了一个方法来解决这个问题。 我的方法是:
1 - 创建一个抽象类,该类具有使用Regex将对象转换为数组(包括私有attr)的方法。 2 - 将返回的数组转换为json。
我将此Abstract类用作所有域类的父
班级代码:
namespace Project\core;
abstract class AbstractEntity {
public function getAvoidedFields() {
return array ();
}
public function toArray() {
$temp = ( array ) $this;
$array = array ();
foreach ( $temp as $k => $v ) {
$k = preg_match ( '/^\x00(?:.*?)\x00(.+)/', $k, $matches ) ? $matches [1] : $k;
if (in_array ( $k, $this->getAvoidedFields () )) {
$array [$k] = "";
} else {
// if it is an object recursive call
if (is_object ( $v ) && $v instanceof AbstractEntity) {
$array [$k] = $v->toArray();
}
// if its an array pass por each item
if (is_array ( $v )) {
foreach ( $v as $key => $value ) {
if (is_object ( $value ) && $value instanceof AbstractEntity) {
$arrayReturn [$key] = $value->toArray();
} else {
$arrayReturn [$key] = $value;
}
}
$array [$k] = $arrayReturn;
}
// if it is not a array and a object return it
if (! is_object ( $v ) && !is_array ( $v )) {
$array [$k] = $v;
}
}
}
return $array;
}
}
答案 4 :(得分:1)
PHP8-代码:
class foo{
function __construct(
public $bar,
protected $bat,
private $baz,
){}
function getBar(){return $this->bar;}
function getBat(){return $this->bat;}
function getBaz(){return $this->baz;}
}
//Create Object
$foo = new foo(bar:"bar", bat:"bat", baz:"baz");
//Object => JSON
$fooJSON = json_encode(serialize($foo));
print_r($fooJSON);
// "O:3:\"foo\":3:{s:3:\"bar\";s:3:\"bar\";s:6:\"\u0000*\u0000bat\";s:3:\"bat\";s:8:\"\u0000foo\u0000baz\";s:3:\"baz\";}"
// Important. In order to be able to unserialize() an object, the class of that object needs to be defined.
# More information here: https://www.php.net/manual/en/language.oop5.serialization.php
//JSON => Object
$fooObject = unserialize(json_decode($fooJSON));
print_r($fooObject);
//(
# [bar] => bar
# [bat:protected] => bat
# [baz:foo:private] => baz
# )
//To use some functions or Properties of $fooObject
echo $fooObject->bar;
// bar
echo $fooObject->getBat();
// bat
echo $fooObject->getBaz();
// baz