(PECL OAuth >= 0.99.1)
OAuth::getRequestToken — Fetch a request token
public OAuth::getRequestToken ( string $request_token_url [, string $callback_url [, string $http_method ]] ) : array
Fetch a request token, secret and any additional response parameters from the service provider.
request_token_url
URL to the request token API.
callback_url
 OAuth callback URL. If callback_url is passed and is an empty value, it is set to "oob" to address the OAuth 2009.1 advisory. 
http_method
 HTTP method to use, e.g. GET or POST. 
 Returns an array containing the parsed OAuth response on success or false on failure. 
| Version | Description | 
|---|---|
| PECL oauth 1.0.0 |  Previously returned null on failure, instead of false.  |  
| PECL oauth 0.99.9 |  The callback_url parameter was added  |  
Example #1 OAuth::getRequestToken() example
<?php
try {
    $oauth = new OAuth(OAUTH_CONSUMER_KEY,OAUTH_CONSUMER_SECRET);
    $request_token_info = $oauth->getRequestToken("https://example.com/oauth/request_token");
    if(!empty($request_token_info)) {
        print_r($request_token_info);
    } else {
        print "Failed fetching request token, response was: " . $oauth->getLastResponse();
    }
} catch(OAuthException $E) {
    echo "Response: ". $E->lastResponse . "\n";
}
?> The above example will output something similar to:
Array
(
    [oauth_token] => some_token
    [oauth_token_secret] => some_token_secret
)
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Licensed under the Creative Commons Attribution License v3.0 or later.
    https://www.php.net/manual/en/oauth.getrequesttoken.php