wp_get_attachment_image_srcset
函数
      wp_get_attachment_image_srcset ( $attachment_id, $size = 'medium', $image_meta = null )    - 参数
- 
- 
                (int)
 $attachment_id
 Image attachment ID.- Required: 是
 
- 
                (string|int[])
 $size
 Optional. Image size. Accepts any registered image size name, or an array of width and height values in pixels (in that order). Default ‘medium’.- Required: 否
- Default: ‘medium’
 
- 
                (array)
 $image_meta
 Optional. The image meta data as returned by ‘wp_get_attachment_metadata()’. Default null.- Required: 否
- Default: null
 
 
- 
                (int)
- 返回值
- 
- (string|false) A ‘srcset’ value string or false.
 
- 相关
- 
- wp_calculate_image_srcset()
 
- 定义位置
- 
- 
                                  wp-includes/media.php
 , line 1212
 
- 
                                  wp-includes/media.php
- 引入
- 4.4.0
- 弃用
- –
Retrieves the value for an image attachment’s ‘srcset’ attribute.
function wp_get_attachment_image_srcset( $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_srcset( $size_array, $image_src, $image_meta, $attachment_id );
}
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