code: function PHPParseRequest(env, title, text, onlypst, queueKey) {
  	ApiRequest.call(this, env, title);
  	this.text = text;
  	this.queueKey = queueKey || text;
  	this.reqType = "Extension Parse";
  
  	var apiargs = {
  		format: 'json',
  		formatversion: 2,
  		action: 'parse',
  		text: text,
  		disablelimitreport: 'true',
  		contentmodel: 'wikitext',
  		prop: 'text|modules|jsconfigvars|categories',
  		wrapoutputclass: '',
  	};
  	if (onlypst) {
  		apiargs.onlypst = 'true';
  	}
  
  	// Pass the page title to the API
  	if (title) {
  		apiargs.title = title;
  	}
  
  	if (env.page.meta.revision.revid) {
  		apiargs.revid = env.page.meta.revision.revid;
  	}
  
  	this.requestOptions = {
  		// Use POST since we are passing a bit of source, and GET has a very
  		// limited length. You'll be greeted by "HTTP Error 414 Request URI
  		// too long" otherwise ;)
  		method: 'POST',
  		form: apiargs, // The API arguments
  		followRedirect: true,
  		uri: env.conf.wiki.apiURI,
  		timeout: env.conf.parsoid.timeouts.mwApi.extParse,
  	};
  
  	this.request(this.requestOptions);
  }
docs: Gets the PHP parser to parse content for us.
  Used for handling extension content right now.
  And, probably magic words later on.
  
  @class
  @extends ~ApiRequest
  @param {MWParserEnvironment} env
  @param {string} title The title of the page to use as context.
  @param {string} text
  @param {boolean} [onlypst] Pass onlypst to PHP parser.
  @param {string} [queueKey] The queue key.