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improved formatting
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edit approved Jul 25, 2019 at 20:22
alo Malbarez
edit approved Jul 25, 2019 at 20:22
alo Malbarez
  • 445
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  • 7

You can set an image as post thumbnail when it is in your media library. To add an image in your media library you need to upload it to your server. WordPress already has a function for putting images in your media library, you only need a script that uploads your file.

Usage:

Generate_Featured_Image( '../wp-content/my_image.jpg',   $post_id );
                                                       
// $post_id is Numeric ID... You can also get the ID with:           
wp_insert_post()

Function:

function Generate_Featured_Image( $image_url, $post_id  ){
    $upload_dir = wp_upload_dir();
    $image_data = file_get_contents($image_url);
    $filename = basename($image_url);
    if(wp_mkdir_p($upload_dir['path']))
      $file = $upload_dir['path'] . '/' . $filename;
    else                               
      $file = $upload_dir['basedir'] . '/' . $filename;
    file_put_contents($file, $image_data);

    $wp_filetype = wp_check_filetype($filename, null );
    $attachment = array(
        'post_mime_type' => $wp_filetype['type'],
        'post_title' => sanitize_file_name($filename),
        'post_content' => '',
        'post_status' => 'inherit'
    );
    $attach_id = wp_insert_attachment( $attachment, $file, $post_id );
    require_once(ABSPATH . 'wp-admin/includes/image.php');
    $attach_data = wp_generate_attachment_metadata( $attach_id, $file );
    $res1= wp_update_attachment_metadata( $attach_id, $attach_data );
    $res2= set_post_thumbnail( $post_id, $attach_id );
}

http://codex.wordpress.org/Function_Reference/wp_upload_dir

http://codex.wordpress.org/Function_Reference/wp_insert_attachment

EDIT: Added path creation

http://codex.wordpress.org/Function_Reference/wp_mkdir_p

You can set an image as post thumbnail when it is in your media library. To add an image in your media library you need to upload it to your server. WordPress already has a function for putting images in your media library, you only need a script that uploads your file.

Usage:

Generate_Featured_Image( '../wp-content/my_image.jpg',   $post_id );
                                                      // $post_id is Numeric ID... You can also get the ID with:          wp_insert_post()

Function:

function Generate_Featured_Image( $image_url, $post_id  ){
    $upload_dir = wp_upload_dir();
    $image_data = file_get_contents($image_url);
    $filename = basename($image_url);
    if(wp_mkdir_p($upload_dir['path']))     $file = $upload_dir['path'] . '/' . $filename;
    else                                    $file = $upload_dir['basedir'] . '/' . $filename;
    file_put_contents($file, $image_data);

    $wp_filetype = wp_check_filetype($filename, null );
    $attachment = array(
        'post_mime_type' => $wp_filetype['type'],
        'post_title' => sanitize_file_name($filename),
        'post_content' => '',
        'post_status' => 'inherit'
    );
    $attach_id = wp_insert_attachment( $attachment, $file, $post_id );
    require_once(ABSPATH . 'wp-admin/includes/image.php');
    $attach_data = wp_generate_attachment_metadata( $attach_id, $file );
    $res1= wp_update_attachment_metadata( $attach_id, $attach_data );
    $res2= set_post_thumbnail( $post_id, $attach_id );
}

http://codex.wordpress.org/Function_Reference/wp_upload_dir

http://codex.wordpress.org/Function_Reference/wp_insert_attachment

EDIT: Added path creation

http://codex.wordpress.org/Function_Reference/wp_mkdir_p

You can set an image as post thumbnail when it is in your media library. To add an image in your media library you need to upload it to your server. WordPress already has a function for putting images in your media library, you only need a script that uploads your file.

Usage:

Generate_Featured_Image( '../wp-content/my_image.jpg', $post_id );
 
// $post_id is Numeric ID... You can also get the ID with: 
wp_insert_post()

Function:

function Generate_Featured_Image( $image_url, $post_id  ){
    $upload_dir = wp_upload_dir();
    $image_data = file_get_contents($image_url);
    $filename = basename($image_url);
    if(wp_mkdir_p($upload_dir['path']))
      $file = $upload_dir['path'] . '/' . $filename;
    else 
      $file = $upload_dir['basedir'] . '/' . $filename;
    file_put_contents($file, $image_data);

    $wp_filetype = wp_check_filetype($filename, null );
    $attachment = array(
        'post_mime_type' => $wp_filetype['type'],
        'post_title' => sanitize_file_name($filename),
        'post_content' => '',
        'post_status' => 'inherit'
    );
    $attach_id = wp_insert_attachment( $attachment, $file, $post_id );
    require_once(ABSPATH . 'wp-admin/includes/image.php');
    $attach_data = wp_generate_attachment_metadata( $attach_id, $file );
    $res1= wp_update_attachment_metadata( $attach_id, $attach_data );
    $res2= set_post_thumbnail( $post_id, $attach_id );
}

http://codex.wordpress.org/Function_Reference/wp_upload_dir

http://codex.wordpress.org/Function_Reference/wp_insert_attachment

EDIT: Added path creation

http://codex.wordpress.org/Function_Reference/wp_mkdir_p

i have made it better for testing, because $image_url was unknown variable for newbie users
Source Link
edit approved Nov 12, 2015 at 16:57
T.Todua
edit approved Nov 12, 2015 at 16:57
T.Todua
  • 5.9k
  • 9
  • 51
  • 79

You can set an image as post thumbnail when it is in your media library. To add an image in your media library you need to upload it to your server. WordPress already has a function for putting images in your media library, you only need a script that uploads your file.

Usage:

Generate_Featured_Image( '../wp-content/my_image.jpg',   $post_id );
                                                      // $post_id is Numeric ID... You can also get the ID with:          wp_insert_post()

Function:

function Generate_Featured_Image( $image_url, $post_id  ){
    $upload_dir = wp_upload_dir();
    $image_data = file_get_contents($image_url);
    $filename = basename($image_url);
    if(wp_mkdir_p($upload_dir['path']))
      $file = $upload_dir['path'] . '/' . $filename;
    else
                                     $file = $upload_dir['basedir'] . '/' . $filename;
    file_put_contents($file, $image_data);

    $wp_filetype = wp_check_filetype($filename, null );
    $attachment = array(
        'post_mime_type' => $wp_filetype['type'],
        'post_title' => sanitize_file_name($filename),
        'post_content' => '',
        'post_status' => 'inherit'
    );
    $attach_id = wp_insert_attachment( $attachment, $file, $post_id );
    require_once(ABSPATH . 'wp-admin/includes/image.php');
    $attach_data = wp_generate_attachment_metadata( $attach_id, $file );
    $res1= wp_update_attachment_metadata( $attach_id, $attach_data );
 
    $res2= set_post_thumbnail( $post_id, $attach_id );
}

$post_id is the variable for the ID you got from wp_insert_post()

http://codex.wordpress.org/Function_Reference/wp_upload_dir

http://codex.wordpress.org/Function_Reference/wp_insert_attachment

EDIT: Added path creation

http://codex.wordpress.org/Function_Reference/wp_mkdir_p

You can set an image as post thumbnail when it is in your media library. To add an image in your media library you need to upload it to your server. WordPress already has a function for putting images in your media library, you only need a script that uploads your file.

$upload_dir = wp_upload_dir();
$image_data = file_get_contents($image_url);
$filename = basename($image_url);
if(wp_mkdir_p($upload_dir['path']))
     $file = $upload_dir['path'] . '/' . $filename;
else
     $file = $upload_dir['basedir'] . '/' . $filename;
file_put_contents($file, $image_data);

$wp_filetype = wp_check_filetype($filename, null );
$attachment = array(
    'post_mime_type' => $wp_filetype['type'],
    'post_title' => sanitize_file_name($filename),
    'post_content' => '',
    'post_status' => 'inherit'
);
$attach_id = wp_insert_attachment( $attachment, $file, $post_id );
require_once(ABSPATH . 'wp-admin/includes/image.php');
$attach_data = wp_generate_attachment_metadata( $attach_id, $file );
wp_update_attachment_metadata( $attach_id, $attach_data );
 
set_post_thumbnail( $post_id, $attach_id );

$post_id is the variable for the ID you got from wp_insert_post()

http://codex.wordpress.org/Function_Reference/wp_upload_dir

http://codex.wordpress.org/Function_Reference/wp_insert_attachment

EDIT: Added path creation

http://codex.wordpress.org/Function_Reference/wp_mkdir_p

You can set an image as post thumbnail when it is in your media library. To add an image in your media library you need to upload it to your server. WordPress already has a function for putting images in your media library, you only need a script that uploads your file.

Usage:

Generate_Featured_Image( '../wp-content/my_image.jpg',   $post_id );
                                                      // $post_id is Numeric ID... You can also get the ID with:          wp_insert_post()

Function:

function Generate_Featured_Image( $image_url, $post_id  ){
    $upload_dir = wp_upload_dir();
    $image_data = file_get_contents($image_url);
    $filename = basename($image_url);
    if(wp_mkdir_p($upload_dir['path']))     $file = $upload_dir['path'] . '/' . $filename;
    else                                    $file = $upload_dir['basedir'] . '/' . $filename;
    file_put_contents($file, $image_data);

    $wp_filetype = wp_check_filetype($filename, null );
    $attachment = array(
        'post_mime_type' => $wp_filetype['type'],
        'post_title' => sanitize_file_name($filename),
        'post_content' => '',
        'post_status' => 'inherit'
    );
    $attach_id = wp_insert_attachment( $attachment, $file, $post_id );
    require_once(ABSPATH . 'wp-admin/includes/image.php');
    $attach_data = wp_generate_attachment_metadata( $attach_id, $file );
    $res1= wp_update_attachment_metadata( $attach_id, $attach_data );
    $res2= set_post_thumbnail( $post_id, $attach_id );
}

http://codex.wordpress.org/Function_Reference/wp_upload_dir

http://codex.wordpress.org/Function_Reference/wp_insert_attachment

EDIT: Added path creation

http://codex.wordpress.org/Function_Reference/wp_mkdir_p

added 2 characters in body
Source Link
Rob Vermeer
Rob Vermeer
  • 5.2k
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  • 29
  • 21

You can set an image as post thumbnail when it is in your media library. To add an image in your media library you need to upload it to your server. WordPress already has a function for putting images in your media library, you only need a script that uploads your file.

$upload_dir = wp_upload_dir();
$image_data = file_get_contents($image_url);
$filename = basename($image_url);
if(wp_mkdir_p($upload_dir['path']))
    $file = $upload_dir['path'] . '/' . $filename$filename;
else
    $file = $upload_dir['basedir'] . '/' . $filename$filename;
file_put_contents($file, $image_data);

$wp_filetype = wp_check_filetype($filename, null );
$attachment = array(
    'post_mime_type' => $wp_filetype['type'],
    'post_title' => sanitize_file_name($filename),
    'post_content' => '',
    'post_status' => 'inherit'
);
$attach_id = wp_insert_attachment( $attachment, $file, $post_id );
require_once(ABSPATH . 'wp-admin/includes/image.php');
$attach_data = wp_generate_attachment_metadata( $attach_id, $file );
wp_update_attachment_metadata( $attach_id, $attach_data );

set_post_thumbnail( $post_id, $attach_id );

$post_id is the variable for the ID you got from wp_insert_post()

http://codex.wordpress.org/Function_Reference/wp_upload_dir

http://codex.wordpress.org/Function_Reference/wp_insert_attachment

EDIT: Added path creation

http://codex.wordpress.org/Function_Reference/wp_mkdir_p

You can set an image as post thumbnail when it is in your media library. To add an image in your media library you need to upload it to your server. WordPress already has a function for putting images in your media library, you only need a script that uploads your file.

$upload_dir = wp_upload_dir();
$image_data = file_get_contents($image_url);
$filename = basename($image_url);
if(wp_mkdir_p($upload_dir['path']))
    $file = $upload_dir['path'] . '/' . $filename
else
    $file = $upload_dir['basedir'] . '/' . $filename
file_put_contents($file, $image_data);

$wp_filetype = wp_check_filetype($filename, null );
$attachment = array(
    'post_mime_type' => $wp_filetype['type'],
    'post_title' => sanitize_file_name($filename),
    'post_content' => '',
    'post_status' => 'inherit'
);
$attach_id = wp_insert_attachment( $attachment, $file, $post_id );
require_once(ABSPATH . 'wp-admin/includes/image.php');
$attach_data = wp_generate_attachment_metadata( $attach_id, $file );
wp_update_attachment_metadata( $attach_id, $attach_data );

set_post_thumbnail( $post_id, $attach_id );

$post_id is the variable for the ID you got from wp_insert_post()

http://codex.wordpress.org/Function_Reference/wp_upload_dir

http://codex.wordpress.org/Function_Reference/wp_insert_attachment

EDIT: Added path creation

http://codex.wordpress.org/Function_Reference/wp_mkdir_p

You can set an image as post thumbnail when it is in your media library. To add an image in your media library you need to upload it to your server. WordPress already has a function for putting images in your media library, you only need a script that uploads your file.

$upload_dir = wp_upload_dir();
$image_data = file_get_contents($image_url);
$filename = basename($image_url);
if(wp_mkdir_p($upload_dir['path']))
    $file = $upload_dir['path'] . '/' . $filename;
else
    $file = $upload_dir['basedir'] . '/' . $filename;
file_put_contents($file, $image_data);

$wp_filetype = wp_check_filetype($filename, null );
$attachment = array(
    'post_mime_type' => $wp_filetype['type'],
    'post_title' => sanitize_file_name($filename),
    'post_content' => '',
    'post_status' => 'inherit'
);
$attach_id = wp_insert_attachment( $attachment, $file, $post_id );
require_once(ABSPATH . 'wp-admin/includes/image.php');
$attach_data = wp_generate_attachment_metadata( $attach_id, $file );
wp_update_attachment_metadata( $attach_id, $attach_data );

set_post_thumbnail( $post_id, $attach_id );

$post_id is the variable for the ID you got from wp_insert_post()

http://codex.wordpress.org/Function_Reference/wp_upload_dir

http://codex.wordpress.org/Function_Reference/wp_insert_attachment

EDIT: Added path creation

http://codex.wordpress.org/Function_Reference/wp_mkdir_p

Bounty Ended with 50 reputation awarded by Chris
deleted 8 characters in body
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Rob Vermeer
Rob Vermeer
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added 243 characters in body
Source Link
Rob Vermeer
Rob Vermeer
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  • 21
Source Link
Rob Vermeer
Rob Vermeer
  • 5.2k
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  • 29
  • 21