我想从PHP脚本返回JSON。
我只是重复结果吗?我必须设置内容类型头吗?
我想从PHP脚本返回JSON。
我只是重复结果吗?我必须设置内容类型头吗?
当前回答
如果你需要从发送自定义信息的php中获取json,你可以添加这个头('Content-Type: application/json');在打印任何其他东西之前,所以然后你可以打印你的自定义echo '{"monto": "'.$monto[0]->valor.'","moneda":"'.$moneda[0]->nombre.'","simbolo":"'.$moneda[0]->simbolo.'"}';
其他回答
如果你需要从发送自定义信息的php中获取json,你可以添加这个头('Content-Type: application/json');在打印任何其他东西之前,所以然后你可以打印你的自定义echo '{"monto": "'.$monto[0]->valor.'","moneda":"'.$moneda[0]->nombre.'","simbolo":"'.$moneda[0]->simbolo.'"}';
是的,你需要使用echo来显示输出。Mimetype: application / json
如果你想要js对象,使用头content-type:
<?php
$data = /** whatever you're serializing **/;
header('Content-Type: application/json; charset=utf-8');
echo json_encode($data);
如果你只想要json: remove header content-type属性,只需要encode和echo。
<?php
$data = /** whatever you're serializing **/;
echo json_encode($data);
如上所述:
header('Content-Type: application/json');
会完成这项工作。但请记住:
即使没有使用这个报头,Ajax读取json也没有问题,除非您的json包含一些HTML标记。在这种情况下,您需要将头文件设置为application/json。 确保您的文件不是用UTF8-BOM编码的。这种格式在文件顶部添加了一个字符,因此header()调用将失败。
无论何时你试图为API返回JSON响应,或者确保你有适当的标题,也确保你返回一个有效的JSON数据。
下面是示例脚本,它可以帮助您从PHP数组或返回JSON响应 来自JSON文件。
PHP脚本(代码):
<?php
// Set required headers
header('Content-Type: application/json; charset=utf-8');
header('Access-Control-Allow-Origin: *');
/**
* Example: First
*
* Get JSON data from JSON file and retun as JSON response
*/
// Get JSON data from JSON file
$json = file_get_contents('response.json');
// Output, response
echo $json;
/** =. =.=. =.=. =.=. =.=. =.=. =.=. =.=. =.=. =.=. =. */
/**
* Example: Second
*
* Build JSON data from PHP array and retun as JSON response
*/
// Or build JSON data from array (PHP)
$json_var = [
'hashtag' => 'HealthMatters',
'id' => '072b3d65-9168-49fd-a1c1-a4700fc017e0',
'sentiment' => [
'negative' => 44,
'positive' => 56,
],
'total' => '3400',
'users' => [
[
'profile_image_url' => 'http://a2.twimg.com/profile_images/1285770264/PGP_normal.jpg',
'screen_name' => 'rayalrumbel',
'text' => 'Tweet (A), #HealthMatters because life is cool :) We love this life and want to spend more.',
'timestamp' => '{{$timestamp}}',
],
[
'profile_image_url' => 'http://a2.twimg.com/profile_images/1285770264/PGP_normal.jpg',
'screen_name' => 'mikedingdong',
'text' => 'Tweet (B), #HealthMatters because life is cool :) We love this life and want to spend more.',
'timestamp' => '{{$timestamp}}',
],
[
'profile_image_url' => 'http://a2.twimg.com/profile_images/1285770264/PGP_normal.jpg',
'screen_name' => 'ScottMili',
'text' => 'Tweet (C), #HealthMatters because life is cool :) We love this life and want to spend more.',
'timestamp' => '{{$timestamp}}',
],
[
'profile_image_url' => 'http://a2.twimg.com/profile_images/1285770264/PGP_normal.jpg',
'screen_name' => 'yogibawa',
'text' => 'Tweet (D), #HealthMatters because life is cool :) We love this life and want to spend more.',
'timestamp' => '{{$timestamp}}',
],
],
];
// Output, response
echo json_encode($json_var);
JSON文件(JSON数据):
{
"hashtag": "HealthMatters",
"id": "072b3d65-9168-49fd-a1c1-a4700fc017e0",
"sentiment": {
"negative": 44,
"positive": 56
},
"total": "3400",
"users": [
{
"profile_image_url": "http://a2.twimg.com/profile_images/1285770264/PGP_normal.jpg",
"screen_name": "rayalrumbel",
"text": "Tweet (A), #HealthMatters because life is cool :) We love this life and want to spend more.",
"timestamp": "{{$timestamp}}"
},
{
"profile_image_url": "http://a2.twimg.com/profile_images/1285770264/PGP_normal.jpg",
"screen_name": "mikedingdong",
"text": "Tweet (B), #HealthMatters because life is cool :) We love this life and want to spend more.",
"timestamp": "{{$timestamp}}"
},
{
"profile_image_url": "http://a2.twimg.com/profile_images/1285770264/PGP_normal.jpg",
"screen_name": "ScottMili",
"text": "Tweet (C), #HealthMatters because life is cool :) We love this life and want to spend more.",
"timestamp": "{{$timestamp}}"
},
{
"profile_image_url": "http://a2.twimg.com/profile_images/1285770264/PGP_normal.jpg",
"screen_name": "yogibawa",
"text": "Tweet (D), #HealthMatters because life is cool :) We love this life and want to spend more.",
"timestamp": "{{$timestamp}}"
}
]
}
JSON Screeshot: