Using RICG programmatically

Hi Ben,

The latest version of the plugin matches the functionality that will be included in WP 4.4, so you can use the new template functions wp_get_attachment_image_srcset() and wp_get_attachment_image_sizes() to help you build custom markup. Additionally, any image that is created using wp_get_attachment_image() will automatically include srcset and sizes attributes. For more, see https://make.www.ads-software.com/core/2015/11/10/responsive-images-in-wordpress-4-4/.

Joe

Hey Joe,

Thanks for replying. This is so close!
Although I cannot get anything out of these two functions in WP 4.3 with RICG plugin activated:

$img_src = wp_get_attachment_image_url( 380, 'medium' );
$img_srcset = wp_get_attachment_image_srcset( 380, 'medium' );

Hi Ben,

A couple of questions:

1. How are you outputting those values once you’ve set them to the two variables?
2. Have you verified that 380 is, in fact, an ID for an image in your media library and not a post?

Joe

Joe, thanks for checking up on me.

Here is what I’ve got:

// :(
// $original = wp_get_attachment_image_url( 381);
// $mobile   = wp_get_attachment_image_srcset( 381, 'mobile' );
// $tablet   = wp_get_attachment_image_srcset( 381, 'tablet' );			

// :)
$original 	= wp_get_attachment_url( 381 );
$mobile 	= wp_get_attachment_image_src( 381, 'mobile');
$tablet   	= wp_get_attachment_image_src( 381, 'tablet' );

Just a side note. I wasn’t able to get srcset to load the (hardcoded or outputted) image per screensize so I resorted to <picture> to be explicit. Any input would be appreciated.

PS. I’m outputting the smiley face code successfully like this:

echo $original;
echo $tablet[0];
echo $mobile[0];

Hi Ben,

Can you tell us more about your custom image sizes?

Do your custom image sizes ‘mobile’ and ‘tablet’ have the same aspect ratio or did you add other custom image sizes with the same aspect ratio for both ‘mobile’ and ‘tablet’?
If there are no other image sizes available with the same aspect ratio wp_get_attachment_image_srcset() will return false, because a srcset with one source is the same as src and has no use.

If you have one image size for mobile and one for tablet and they have different aspect ratios then you would indeed need to use a <picture> element. But this is outside the scope of this plugin and what will be included in WP core 4.4.

Earlier you said that $img_srcset = wp_get_attachment_image_srcset( 380, 'medium' ); is returning false too. This should normally result in a srcset value because ‘medium’ and ‘large’ have the same aspect ratio. Is the original image with ID 380 big enough to create a ‘large’ image?
Do you use the defaults for these image sizes (medium: 300, large: 1024) or did you change them in the media settings?

Hey Jasper,

I did end up using my old friend <picture>

Yes I do have several custom add_image_sizes for my images most of which have no hard crop. Really good info regarding ratios.

I have not changed any media settings only added those custom sizes via code.