Uses
| Uses | Description | 
|---|---|
| wp-includes/media.php: adjacent_image_link() | Displays next or previous image link that has the same post parent. | 
Displays previous image link that has the same post parent.
 (string|array) (Optional)  Image size. Accepts any valid image size, an array of width and height values in pixels (in that order), 0, or 'none'. 0 or 'none' will default to 'post_title' or $text.  
Default value: 'thumbnail'
(string) (Optional) Link text.
Default value: false
Typically uses in attachment.php. In the WordPress default theme Twenty Eleven and Twenty Twelve, it is used in image.php.
previous_image_link( $size, $text );
This creates a link to the previous image attached to the current post. Whenever a series of images are linked to the attachment page, it will put a ‘previous image link’ with the images when viewed in the attachment page.
File: wp-includes/media.php
function previous_image_link( $size = 'thumbnail', $text = false ) {
	adjacent_image_link( true, $size, $text );
}  | Version | Description | 
|---|---|
| 2.5.0 | Introduced. | 
    © 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
    https://developer.wordpress.org/reference/functions/previous_image_link