<?php
$username = 'Twitter-User';
$password = 'Passwort';
?>

<?php
// Bilder Speichern
ob_start();
$fp = fopen("http://assets0.twitter.com/images/twitter_logo_header.png", "rb"); //Image lesen
fpassthru($fp);
fclose($fp);
$file = ob_get_contents();
ob_end_clean();
$fp = fopen("./twitterlogo.png", "wb+"); //Image speichern
fwrite($fp, $file);
fclose($fp);
?>

<?php
function account_update_profile_image($image, $user, $pw) {
		$args = array();
		if(file_exists($image)) {
			$args['image'] = "@$image";
		}
 
		if(isset($args['image'])) {		
			$url = "http://twitter.com/account/update_profile_image.xml";
			//PRINT_r($args);
			$curl_handle = curl_init();
			curl_setopt($curl_handle, CURLOPT_URL, "$url");
			curl_setopt($curl_handle, CURLOPT_CONNECTTIMEOUT, 2);
			curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, 1);
			curl_setopt($curl_handle, CURLOPT_POST, 1);
			curl_setopt($curl_handle, CURLOPT_HTTPHEADER, array('Expect:'));
			curl_setopt($curl_handle, CURLOPT_POSTFIELDS, $args);
			curl_setopt($curl_handle, CURLOPT_USERPWD, "$user:$pw");
			$buffer = curl_exec($curl_handle);
			curl_close($curl_handle); 
			//PRINT_R($buffer);
		} 
	}
?>

account_update_profile_image("twitterlogo.png", $username, $password);