wp_mirror_images_on_tumblr.php

<?php
/*
 How To Mirror Remote Images On Tumblr With WordPress
*/

// URL of the image you want to mirror. Here: Girl in pink underwear.
$image = 'http://i.imgur.com/Hq4QA.jpg';

// URL of the Tumblr API
$api = 'http://www.tumblr.com/api/write';

// Parameters of the POST request
$options = array(
'email' => '[email protected]',
'password' => '123456',
'type' => 'photo',
'source' => $image
);

// Do the POST
var_dump( wp_remote_post( $api, array( 'body' => $options, 'timeout' => 20 ) ) );

/* Example output:
array(4) {
  ["headers"]=>
  array(8) {
    ["date"]=>
    string(29) "Sun, 05 Sep 2010 17:32:42 GMT"
    ["server"]=>
    string(21) "Apache/2.2.3 (CentOS)"
    ["p3p"]=>
    string(46) "CP="ALL ADM DEV PSAi COM OUR OTRo STP IND ONL""
    ["content-length"]=>
    string(2) "10"
    ["vary"]=>
    string(15) "Accept-Encoding"
    ["x-tumblr-usec"]=>
    string(10) "D=14995333"
    ["connection"]=>
    string(5) "close"
    ["content-type"]=>
    string(25) "text/plain; charset=utf-8"
  }
  ["body"]=>
  string(10) "1070574277"
  ["response"]=>
  array(2) {
    ["code"]=>
    int(201)
    ["message"]=>
    string(7) "Created"
  }
  ["cookies"]=>
  array(0) {
  }
}
*/
?>