一、json_encode()

  • 将PHP的数据结构转换成JOSN
  • 代码1
<?php$arr = array (\'a\'=>1,\'b\'=>2,\'c\'=>3,\'d\'=>4,\'e\'=>5);
echo json_encode($arr);?>
  • 结果
{\"a\":1,\"b\":2,\"c\":3,\"d\":4,\"e\":5}
  • 代码2
$obj->body           = \'another post\';
$obj->id             = 21;
$obj->approved       = true;
$obj->favorite_count = 1;
$obj->status         = NULL;
echo json_encode($obj);
  • 结果
{
   \"body\":\"another post\",
   \"id\":21,
   \"approved\":true,
   \"favorite_count\":1,
   \"status\":null
 }

二、json_decode()

  • 将json文本转换为相应的PHP数据结构

    • 代码1
$json = \'{\"foo\": 12345}\';
$obj = json_decode($json);
print $obj->{\'foo\'}; // 12345
  • 代码2
$json = \'{\"a\":1,\"b\":2,\"c\":3,\"d\":4,\"e\":5}\';
var_dump(json_decode($json));
  • 结果
 (stdClass)#1 (5) {
 
  [\"a\"] => int(1)
  [\"b\"] => int(2)
  [\"c\"] => int(3)
  [\"d\"] => int(4)
  [\"e\"] => int(5)
 
}
  • 如果想要强制生成PHP关联数组,json_decode()需要加一个参数true:

    • 代码
$json = \'{\"a\":1,\"b\":2,\"c\":3,\"d\":4,\"e\":5}\'; 
var_dump(json_decode($json,true));
  • 结果
array(5) {   [\"a\"] => int(1)  
                      [\"b\"] => int(2)  
                      [\"c\"] => int(3)   
                          [\"d\"] => int(4)  
                       [\"e\"] => int(5)}



链接:https://www.jianshu.com/p/c5bb7b28c94b

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