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filter is not described

wp_calculate_image_srcset filter-hook . WP 4.4.0

Filters an image's 'srcset' sources.

Usage

add_filter( 'wp_calculate_image_srcset', 'filter_function_name_9945', 10, 5 );
function filter_function_name_9945( $sources, $size_array, $image_src, $image_meta, $attachment_id ){
	// filter...

	return $sources;
}
$sources(array)

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.
$size_array(array)
Array of width and height values in pixels (in that order).
$image_src(string)
The 'src' of the image.
$image_meta(array)
The image meta data as returned by 'wp_get_attachment_metadata()'.
$attachment_id(int)
Image attachment ID or 0.

Where the hook is called

wp_calculate_image_srcset()
wp-includes/media.php 1203
$sources = apply_filters( 'wp_calculate_image_srcset', $sources, $size_array, $image_src, $image_meta, $attachment_id );

Where the hook is used (in WP core)

Does not used.