Get image's size name from it's dimension

Question

As we know, image's sizes have different names which we can use to call the appropriate image size. Like 'thumbnail', 'large', 'medium' or a custom 'my-thumbnail' size. I can the_post_thumbnail_url( 'medium' ) to get medium size and it's dimensions.

however, i need to get the NAME from the image size. To be precise, if the image size is 300x200 and it's name is 'small', i want to get 'small' by entering 300 and 200 into a function.

Can anyone help me achieve this please? Thanks.

Answer 1

Here I've written a function for you. Place this below function on your functions.php or any where that executes and pass the width and height value to it. It will return you the image size name as string and if it has not found any then it will return false.

/**
 * Get name by size information for image.
 *
 * @global $_wp_additional_image_sizes
 * @uses   get_intermediate_image_sizes()
 * @return string $_sizes bool Data for passed measurements image.
 */
function wpse_243461_get_image_size_name( $w = 150, $h = 150 ) {
    global $_wp_additional_image_sizes;

    $sizes = array();
    foreach ( get_intermediate_image_sizes() as $_size ) {
        if ( in_array( $_size, array('thumbnail', 'medium', 'medium_large', 'large') ) ) {
            if ( $w == get_option( "{$_size}_size_w" ) && $h == get_option( "{$_size}_size_h" ))
                return $_size;
        } elseif ( isset( $_wp_additional_image_sizes[ $_size ] ) ) {
            if ( $w == $_wp_additional_image_sizes[ $_size ]['width'] && $h == $_wp_additional_image_sizes[ $_size ]['height'] )
                return $_size;
        }
    }

    return false;
}

By default it is taking width 150 and height 150 which is passed like this $w = 150, $h = 150. And you have to use it like the_dramatist_get_image_size_name(300, 300). Please keep it in mind that $w and $h takes integer value.