Parsing JSON with DataSource

In this recipe, we will use DataSource in conjunction with the JSONSchema plug-in to retrieve and parse a data file in the JSON format.

Getting ready

We will use three files in this example:

• data.json: A data file in JSON format with the following contents:

  {
  "list":[
  {"name":"Item One"},
  {"name":"Item Two"},
  {"name":"Item Three"},
  {"name":"Item Four"},
  {"name":"Item Five"},
  {"name":"Item Six"},
  {"name":"Item Seven"},
  {"name":"Item Eight"},
  {"name":"Item Nine"},
  {"name":"Item Ten"}
  ]
  }
  

• datasource_json.php: A PHP page with an input button for initiating the request and a textarea to display the results:

  <?php
  require_once(dirname(__FILE__) . '/../config.php');
  $PAGE->set_url('/cook/datasource_json.php');
  $PAGE->requires->js('/cook/datasource_json.js');
  echo $OUTPUT->header();
  ?>
  <form>
  <textarea id="contents" rows="10"></textarea>
  <br />
  <input id="go" type="button" value="Get JSON">
  </form>
  <?
  echo $OUTPUT...