[英]Unable to access object property php
我在rewards-object.php文件中具有以下对象:
<?php
$rewards_obj_data = array(
array(
'reward_id' => 0,
'reward_mile_text' => "mile 0",
'reward_title' => "Tag Connected Watch",
'reward_img' => "../assets/rewards/rewards-1.jpg",
'reward_apr' => "Representative 18.9% APR (variable)",
'reward_cta_url' => "rewards/claimReward.jsp&rewardID=0"/* + auth cookie details */,
),
array(
'reward_id' => 1,
'reward_mile_text' => "mile 1",
'reward_title' => "Tag Connected Watch",
'reward_img' => "../assets/rewards/rewards-1.jpg",
'reward_apr' => "Representative 18.9% APR (variable)",
),
array(
'reward_id' => 2,
'reward_mile_text' => "mile 2",
'reward_title' => "Tag Connected Watch",
'reward_img' => "../assets/rewards/rewards-1.jpg",
'reward_apr' => "Representative 18.9% APR (variable)",
),
array(
'reward_id' => 3,
'reward_mile_text' => "mile 3",
'reward_title' => "Tag Connected Watch",
'reward_img' => "../assets/rewards/rewards-1.jpg",
'reward_apr' => "Representative 18.9% APR (variable)",
),
array(
'reward_id' => 4,
'reward_mile_text' => "mile 4",
'reward_title' => "Tag Connected Watch",
'reward_img' => "../assets/rewards/rewards-1.jpg",
'reward_apr' => "Representative 18.9% APR (variable)",
),
);
?>
我试图在另一个for循环中访问其属性:
<?php
require '../api/rewards-object.php';
// in between here I make some API calls to retrive an array of objects which I have named $rewardsAPIResponse
// parse http request
$decode_rewardsAPIResponse = json_decode($rewardsAPIResponse);
/* for loop */
foreach($decode_rewardsAPIResponse as $key=>$value){
$IdFromApi = $value->rewardID;
$test = json_encode($rewards_obj_data[$IdFromApi]->reward_title);
echo $test;
};
?>
这里的想法是使用从API返回的对象的ID来获取rewards-object.php文件中的对象。
目前,如果我替换此行:
$test = json_encode($rewards_obj_data[$IdFromApi]->reward_id);
echo $test;
与:
$test = json_encode($rewards_obj_data[$IdFromApi]);
echo $test;
然后,它可以毫无问题地获取对象! 问题出在我试图访问对象属性(例如reward_title
。 在这里,它返回的值为null。 我一直在玩json_encode部分,因为我认为这可能是问题所在,但到目前为止,我尝试过的所有方法均无效。 有什么想法我做错了吗?
我看不到对象,而是二维数组。 以$rewards_obj_data[$IdFromApi]['reward_title'];
访问您的值$rewards_obj_data[$IdFromApi]['reward_title'];
$ rewards_obj_data是一个数组,内容也是如此。 但是您尝试像访问对象一样访问它。 它是一个数组,而不是对象。 这是正确的方法:
$rewards_obj_data[$IdFromApi]['reward_id']
您的数组不是对象。 在PHP数组中可能存在具有整数和字符串键,也许就是这种混乱。
echo $rewards_obj_data[0]['reward_id']; // 0
foreach($rewards_obj_data as $value){
echo $value['reward_id'];
}
// Convert array to to string, converting arrays to objects.
$json = json_encode($rewards_obj_data, JSON_FORCE_OBJECT);
// Convert json to a PHP object.
$data = json_decode($json);
foreach($data as $obj){
echo $obj->reward_id;
}
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