Dropbox API - Call to undefined function readline() - php

Question

I have the following code
<?php
// Include DropBox API
require_once "dropbox-sdk/Dropbox/autoload.php";
use \Dropbox as dbx;
// Settings for DropBox
$appInfo = dbx\AppInfo::loadFromJsonFile("config.json");
$webAuth = new dbx\WebAuthNoRedirect($appInfo, "PHP-Example/1.0");
$authCode = \trim(\readline("A-WALID-KEY-HERE"));
list($accessToken, $dropboxUserId) = $webAuth->finish($authCode);
print "Access Token: " . $accessToken . "\n";
?>
Bud i get this error when i run the code.
Call to undefined function readline()
What am I doing wrong?

Answer 1

It sounds from your comment like you're trying to run this as a web app. If so, you're going to run into trouble. This looks like the command-line app example code, which is why it uses readline (which reads input from the command-line).
You might want to start from the web-file-browser example that ships with the SDK. This is meant to be run as a web app and should show you to how to do (among other things) authentication in the browser.

Answer 2

I had the same problem with the same code. You have forgotten to add this:
$authorizeUrl = $webAuth->start();
just right after this line:
$webAuth = new dbx\WebAuthNoRedirect($appInfo, "PHP-Example/1.0");
What you have to do is to use the created link stored in the variable $authorizeUrl to get the authorization code.
After doing this you need to use the authorization code to generate a token. For this comment the part of your code like that:
<?php
// Include DropBox API
require_once "dropbox-sdk/Dropbox/autoload.php";
use \Dropbox as dbx;
// Settings for DropBox
//$appInfo = dbx\AppInfo::loadFromJsonFile("config.json");
//$webAuth = new dbx\WebAuthNoRedirect($appInfo, "PHP-Example/1.0");
//**$authorizeUrl = $webAuth->start();**
$authCode = \trim(\readline("**A-WALID-KEY-HERE**"));
list($accessToken, $dropboxUserId) = $webAuth->finish($authCode);
print "Access Token: " . $accessToken . "\n";
?>
Once you get the token save it somewhere safe and comment also the rest of the lines. Then you can access dropbox with no problem. For example:
$dbxClient = new dbx\Client($accessToken, "PHP-Example/1.0");
$accountInfo = $dbxClient->getAccountInfo();