Call to undefined function readline()?

Question

I am integrating Dropbox into my PHP based website. When i try to run the following code. i got this Fatal error: Call to undefined function readline() on the last line.

require_once "dropbox-sdk/Dropbox/autoload.php";
use \Dropbox as dbx;
$appInfo = dbx\AppInfo::loadFromJsonFile("app-info.json");

echo "<pre>";
print_r($appInfo);
echo "</pre>";

$webAuth = new dbx\WebAuthNoRedirect($appInfo, "PHP-Example/1.0");

echo "<pre>";
print_r($webAuth);
echo "</pre>";

$authorizeUrl = $webAuth->start();
echo "1. Go to: " . $authorizeUrl . "\n<br>";
echo "2. Click \"Allow\" (you might have to log in first).\n<br>";
echo "3. Copy the authorization code.\n<br>";
$authCode = \trim(\readline("Enter the authorization code here: "));

I have come through different forum where people said it will work in Command line , But I don't understand how? Any idea ?

Chris Gibb · Answer 1 · 2017-06-02T10:33:30.907

23

Or just use this to simulate it

if(!function_exists("readline")) {
    function readline($prompt = null){
        if($prompt){
            echo $prompt;
        }
        $fp = fopen("php://stdin","r");
        $line = rtrim(fgets($fp, 1024));
        return $line;
    }
}

edited Jun 02 '17 at 10:33

answered Aug 16 '14 at 13:48

Chris Gibb

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this is the oddest of things but thanks for the work-around – relipse May 25 '16 at 20:50
2

For best support you should wrap in `if(!function_exists("readline"))` prevents the annoying redefine error – Barkermn01 Sep 22 '16 at 12:02
A little notice, you can replace `fopen("php://stdin", "r")` with `STDIN` PHP constant, which is defined in the same way. – George Dimitriadis Jun 01 '17 at 09:18

score 4 · Answer 2 · edited Jun 18 '19 at 13:57

4

readline() is for running on the command line not via the web browser.

To check you have it installed on your server, type:

php -i | grep Configure

Probably, you have not installed it and you should compile it yourself or ask your hosting admin to if they allow this.

edited Jun 18 '19 at 13:57

darrenp

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answered Apr 25 '14 at 02:51

David

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score 3 · Answer 3 · edited Apr 13 '17 at 12:22

3

Just had this issue on Ubuntu.

Found this answer: https://askubuntu.com/a/264329/166

The solution in this scenario was to install the package php5-readline.

edited Apr 13 '17 at 12:22

Community

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answered Jul 13 '15 at 10:25

bcmcfc

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Call to undefined function readline()?

3 Answers3

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