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wp_get_attachment_image_sizes( int $attachment_id, array|string $size = 'medium', array $image_meta = null )

Retrieves the value for an image attachment’s ‘sizes’ attribute.

Description

Parameters

$attachment_id

(int) (Required) Image attachment ID.

$size

(array|string) (Optional) Image size. Accepts any valid image size, or an array of width and height values in pixels (in that order).

Default value: 'medium'

$image_meta

(array) (Optional) The image meta data as returned by 'wp_get_attachment_metadata()'.

Default value: null

Return

(string|bool) A valid source size value for use in a 'sizes' attribute or false.

Source

File: wp-includes/media.php

function wp_get_attachment_image_sizes( $attachment_id, $size = 'medium', $image_meta = null ) {
	$image = wp_get_attachment_image_src( $attachment_id, $size );

	if ( ! $image ) {
		return false;
	}

	if ( ! is_array( $image_meta ) ) {
		$image_meta = wp_get_attachment_metadata( $attachment_id );
	}

	$image_src  = $image[0];
	$size_array = array(
		absint( $image[1] ),
		absint( $image[2] ),
	);

	return wp_calculate_image_sizes( $size_array, $image_src, $image_meta, $attachment_id );
}

Uses

Uses	Description
wp-includes/media.php: wp_calculate_image_sizes()	Creates a ‘sizes’ attribute value for an image.
wp-includes/functions.php: absint()	Convert a value to non-negative integer.
wp-includes/media.php: wp_get_attachment_image_src()	Retrieves an image to represent an attachment.
wp-includes/post.php: wp_get_attachment_metadata()	Retrieves attachment metadata for attachment ID.

Changelog

Version	Description
4.4.0	Introduced.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/wp_get_attachment_image_sizes