从URL上传图片

#1 楼

$uploaddir = wp_upload_dir();
$uploadfile = $uploaddir['path'] . '/' . $filename;

$contents= file_get_contents('http://mydomain.com/folder/image.jpg');
$savefile = fopen($uploadfile, 'w');
fwrite($savefile, $contents);
fclose($savefile);

$wp_filetype = wp_check_filetype(basename($filename), null );

$attachment = array(
    'post_mime_type' => $wp_filetype['type'],
    'post_title' => $filename,
    'post_content' => '',
    'post_status' => 'inherit'
);

$attach_id = wp_insert_attachment( $attachment, $uploadfile );

$imagenew = get_post( $attach_id );
$fullsizepath = get_attached_file( $imagenew->ID );
$attach_data = wp_generate_attachment_metadata( $attach_id, $fullsizepath );
wp_update_attachment_metadata( $attach_id, $attach_data );

#2 楼

// Gives us access to the download_url() and wp_handle_sideload() functions
require_once( ABSPATH . 'wp-admin/includes/file.php' );

// URL to the WordPress logo
$url = 'http://s.w.org/style/images/wp-header-logo.png';
$timeout_seconds = 5;

// Download file to temp dir
$temp_file = download_url( $url, $timeout_seconds );

if ( !is_wp_error( $temp_file ) ) {

    // Array based on $_FILE as seen in PHP file uploads
    $file = array(
        'name'     => basename($url), // ex: wp-header-logo.png
        'type'     => 'image/png',
        'tmp_name' => $temp_file,
        'error'    => 0,
        'size'     => filesize($temp_file),
    );

    $overrides = array(
        // Tells WordPress to not look for the POST form
        // fields that would normally be present as
        // we downloaded the file from a remote server, so there
        // will be no form fields
        // Default is true
        'test_form' => false,

        // Setting this to false lets WordPress allow empty files, not recommended
        // Default is true
        'test_size' => true,
    );

    // Move the temporary file into the uploads directory
    $results = wp_handle_sideload( $file, $overrides );

    if ( !empty( $results['error'] ) ) {
        // Insert any error handling here
    } else {

        $filename  = $results['file']; // Full path to the file
        $local_url = $results['url'];  // URL to the file in the uploads dir
        $type      = $results['type']; // MIME type of the file

        // Perform any actions here based in the above results
    }

}

#3 楼

#4 楼