Using Media Handle Sideload

using-media-handle-sideload.php

<?php

/* set the url of the file to sideload - probably be from $_POST or something */
$url = 'http://domain.com/image.jpg';

/**
 * donwload the url into wordpress
 * saved temporarly for now
 */
$tmp = download_url( $url );

/**
 * biild an array of file information about the url
 * getting the files name using basename()
 */
$file_array = array(
    'name' => basename( $url ),
    'tmp_name' => $tmp
);

/**
 * Check for download errors
 * if there are error unlink the temp file name
 */
if ( is_wp_error( $tmp ) ) {
    @unlink( $file_array[ 'tmp_name' ] );
    return $tmp;
}

/**
 * now we can use the sideload function
 * we pass it the file array of the file to handle
 * and the post id of the post to attach it too
 * it returns the attachment id if the file
 */
$id = media_handle_sideload( $file_array, $post_id );

/**
 * check for handle sideload errors
 * if errors again unlink the file
 */
if ( is_wp_error( $id ) ) {
    @unlink( $file_array['tmp_name'] );
    return $id;
}

/**
 * get the url from the newly upload file
 * $value now contians the file url in WordPress
 * $id is the attachment id
 */
$value = wp_get_attachment_url( $id );

// probbaly do something here with $value (or $id)
?>