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How can I extract the width of an image as defined in add_image_size for use as a template variable?

For example if my theme defines the size small as add_image_size( 'small', 195, 146, true ); 195 would be the variable.

I am trying to build a dynamic mshots url.

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2 Answers

up vote 1 down vote accepted

Generally speaking, there's no need to do this. However, if it's one added using add_image_size, it will be in the $_wp_additional_image_sizes global.

global $_wp_additional_image_sizes;
echo $_wp_additional_image_sizes['small']['width'];
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Thanks @Otto. It was my goal to make the mshot look like the featured image for a link post format. This worked perfectly! –  mattrepublic Sep 12 '11 at 18:59
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This <?php wp_get_attachment_image_src( $attachment_id); ?> should return an array of

[0] => url
[1] => width
[2] => height

Also wp_get_attachment_metadata returns the original image size and additional photo data.

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