rest-api.php

   1 <?php
   2
   3 // Response 'Content-Type' header
   4 header('Content-Type: application/json');
   5
   6 // Flag that tells if the 'Accept' header in the request is invalid
   7 $invalidAccept = '*/*' != $_SERVER['HTTP_ACCEPT'] && 'application/json' != $_SERVER['HTTP_ACCEPT'];
   8
   9 // Do not accept requests which 'Accept' header isn't one of the above
  10 if ($invalidAccept) {
  11     header('HTTP/1.1 406 Not Acceptable');
  12     exit;
  13 }
  14
  15 // Get request method and path
  16 $method = strtolower($_SERVER['REQUEST_METHOD']);
  17 $uri = parse_url($_SERVER['REQUEST_URI']);
  18 $path = trim(trim($uri['path']), '/');
  19
  20 // Default 'resource' and 'id' values
  21 $resource = 'root';
  22 $id = null;
  23
  24 // Get 'resource' and 'id' values
  25 if ($path) {
  26     $path = explode('/', $path);
  27     $resource = $path[0];
  28     if (!empty($path[1])) {
  29         $id = (int) $path[1];
  30     }
  31 }
  32
  33 // Default 'input' value
  34 $input = null;
  35
  36 // Get 'input' value
  37 if ('post' == $method || 'put' == $method) {
  38     $input = file_get_contents('php://input');
  39 }
  40
  41 // File name (convention) from where the logic will be loaded
  42 $fileName = strtolower("{$method}_{$resource}");
  43 $fileName.= $id ? '_id' : '';
  44 $fileName.= '.php';
  45
  46 // Function name (convention) that handles the request
  47 //
  48 // The function will receive the following parameters:
  49 //
  50 // * Parameter 1: int|null    $id    The item ID (if it's present)
  51 // * Parameter 2: string|null $input The input value (if it's present)
  52 $functionName = 'handle_request';
  53
  54 // Load and call the logic that handles the request
  55 if (is_readable($fileName)) {
  56     require_once($fileName);
  57     if (function_exists($functionName)) {
  58         $functionName($id, $input);
  59         exit;
  60     }
  61 }
  62
  63 // Default (404) response code
  64 header('HTTP/1.1 404 Not Found');