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filter is not described

wp_calculate_image_srcset filter-hook . WP 4.4.0

Filters an image's 'srcset' sources.


add_filter( 'wp_calculate_image_srcset', 'filter_function_name_3981', 10, 5 );
function filter_function_name_3981( $sources, $size_array, $image_src, $image_meta, $attachment_id ){
	// filter...

	return $sources;

One or more arrays of source data to include in the 'srcset'.

  • $width (array)

    • $url (string)
      The URL of an image source.

    • $descriptor (string)
      The descriptor type used in the image candidate string, either 'w' or 'x'.

    • $value (int)
      The source width if paired with a 'w' descriptor, or a pixel density value if paired with an 'x' descriptor.

An array of requested width and height values.

  • $0 (int)
    The width in pixels.

  • $1 (int)
    The height in pixels.
The 'src' of the image.
The image meta data as returned by 'wp_get_attachment_metadata()'.
Image attachment ID or 0.


Since 4.4.0 Introduced.

Where the hook is called

wp-includes/media.php 1376
$sources = apply_filters( 'wp_calculate_image_srcset', $sources, $size_array, $image_src, $image_meta, $attachment_id );

Where in WP core the hook is used

Usage not found!