image_style_url doesn't create images [closed]

Question

I am using image_style_url to get a thumbnail of a picture I added through the administrator interface.

// $foo->field_picture['und'][0]['uri'] has value public://foo.jpg
image_style_url('foo-thumb', $foo->field_picture['und'][0]['uri']);

The API states that the image will be created when the URL is requested. However, when visiting the page the image isn't displayed (404). The URL returned from the function seems to be well formed, but the file hasen't been created.

The 'foo-thumb' folder is in the public data folder and the file permissions should be OK. I tried flushing the image cache (drupal image-flush foo-thumb) but still no results.

Any ideas?

Answer 1

From: https://drupal.org/drupal-7.20-release-notes

In addition, any code which programmatically generates a link to an image derivative without using the standard image_style_url() API function will no longer work correctly if the image does not already exist in the file system, since the necessary token will not be present in the URL.

Instead you can do something like this;

$image_uri      = $node->field_image[LANGUAGE_NONE][0]['uri']; // or any public://my_image
$style          = 'my_style';
$derivative_uri = image_style_url($style, $image_uri);
$success        = file_exists($derivative_uri) || image_style_create_derivative(image_style_load($style), $image_uri, $derivative_uri);

$new_image_url  = file_create_url($derivative_uri);

Answer 2

One common mistake is that URIs are not properly formatted. Check that your URI parameter is prefixed with public://.

Bad Practice

$imageUrl = image_style_url('style_name', 'myimage.jpg');
$imageUrl = image_style_url('style_name', $node->field_x[$node->language][0]['filename']);

This outputs a URL to the styled image (with image token), but does not generate a styled image when it hasn't been previously generated.

---

Good Practice

$imageUrl = image_style_url('style_name', file_build_uri('myimage.jpg')); // changes to 'public://myimage.jpg'
$imageUrl = image_style_url('style_name', $node->field_x[$node->language][0]['uri']);

This outputs a styled URL, like the above, and generates a styled image if none exists.

Answer 3

The public file system path was wrong.

Answer 4

Another option is to use the theme function.

$img = theme('image_style', array('style_name' => 'your_image_style_machine_name', 'path' => $node->field_image['und'][0]['uri']));

Rather than returning the URL it will return the html for the img.

Answer 5

$fid = file_load($field_yuorfield_fid);          
$image_uri = image_style_url('yuor_style', $fid->uri);
fopen($image_uri, 'r');

here can use url for create html

Answer 6

Make sure you have foo-thumb style, you can check at admin/config/media/image-styles.

The first parameters of image_style_url is a style name, not a folder name.

Answer 7

If you receive a 404 when trying to view the image, a possibility is that the image style name is not correct. In my case, the style name that showed up in Image Styles was not the machine name of the style name. When hovering over the style the url will display the machine name of the style name. Either change it to the machine name or delete the current and recreate with the name needed.