从HTTP接收JSON对象在PHP中获取

Question

I am trying to implement a php client that sends an HTTP GET to the server which sends back a JSON object with the return information. I know how to decode the JSON once my php script has received it, but how would I go about actually getting it?

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EDIT: Note - I send the server an HTTP GET, and it generates and sends back a JSON file. It is not a file sitting on the server.

Answer 1

检出file_get_contents

$json = file_get_contents('http://somesite.com/getjson.php');

Answer 2

Browsers act differently based on what the server responds. It does not matter what type of request you make to the server (be it GET, POST, etc), but to return JSON as a response you have to set the header in the script you make the request to:

header('Content-Type: application/json;charset=utf-8;');

And then echo the JSON string, for example:

//...populating your result data array here...//
// Print out the JSON formatted data
echo json_encode($myData);

User agent will then get the JSON string. If AJAX made the request then you can simply parse that result into a JavaScript object that you can handle, like this:

//...AJAX request here...//
// Parse result to JavaScript object
var myData=JSON.parse(XMLHttp.responseText);

The header itself is not -really- necessary, but is sort-of good practice. JSON.parse() can parse the response regardless.