|
@@ 987-1003 (lines=17) @@
|
| 984 |
|
* Default null. |
| 985 |
|
* @return string|bool A 'srcset' value string or false. |
| 986 |
|
*/ |
| 987 |
|
function wp_get_attachment_image_srcset( $attachment_id, $size = 'medium', $image_meta = null ) { |
| 988 |
|
if ( ! $image = wp_get_attachment_image_src( $attachment_id, $size ) ) { |
| 989 |
|
return false; |
| 990 |
|
} |
| 991 |
|
|
| 992 |
|
if ( ! is_array( $image_meta ) ) { |
| 993 |
|
$image_meta = get_post_meta( $attachment_id, '_wp_attachment_metadata', true ); |
| 994 |
|
} |
| 995 |
|
|
| 996 |
|
$image_src = $image[0]; |
| 997 |
|
$size_array = array( |
| 998 |
|
absint( $image[1] ), |
| 999 |
|
absint( $image[2] ) |
| 1000 |
|
); |
| 1001 |
|
|
| 1002 |
|
return wp_calculate_image_srcset( $size_array, $image_src, $image_meta, $attachment_id ); |
| 1003 |
|
} |
| 1004 |
|
|
| 1005 |
|
/** |
| 1006 |
|
* A helper function to calculate the image sources to include in a 'srcset' attribute. |
|
@@ 1203-1219 (lines=17) @@
|
| 1200 |
|
* Default null. |
| 1201 |
|
* @return string|bool A valid source size value for use in a 'sizes' attribute or false. |
| 1202 |
|
*/ |
| 1203 |
|
function wp_get_attachment_image_sizes( $attachment_id, $size = 'medium', $image_meta = null ) { |
| 1204 |
|
if ( ! $image = wp_get_attachment_image_src( $attachment_id, $size ) ) { |
| 1205 |
|
return false; |
| 1206 |
|
} |
| 1207 |
|
|
| 1208 |
|
if ( ! is_array( $image_meta ) ) { |
| 1209 |
|
$image_meta = get_post_meta( $attachment_id, '_wp_attachment_metadata', true ); |
| 1210 |
|
} |
| 1211 |
|
|
| 1212 |
|
$image_src = $image[0]; |
| 1213 |
|
$size_array = array( |
| 1214 |
|
absint( $image[1] ), |
| 1215 |
|
absint( $image[2] ) |
| 1216 |
|
); |
| 1217 |
|
|
| 1218 |
|
return wp_calculate_image_sizes( $size_array, $image_src, $image_meta, $attachment_id ); |
| 1219 |
|
} |
| 1220 |
|
|
| 1221 |
|
/** |
| 1222 |
|
* Creates a 'sizes' attribute value for an image. |
ntwb /
wordpress
