bw_get_attached_file_name() – Return the ‘correct’ URL for the attached image

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Description

Return the 'correct' URL for the attached image

We cannot rely on $post->guid since the uploaded file may have been edited in the media dialog and given a new name. We need to obtain the file name from the metadata and then fully qualify it for the browser

[0] => Array 
( 
[width] => 350 
[height] => 178 
[hwstring_small] => height='65' width='128' 
[file] => 2012/03/nggallery-example1.jpg 
[sizes] => Array 
( 
[thumbnail] => Array 
( 
[file] => nggallery-example1-150x150.jpg 
[width] => 150 
[height] => 150 
) 

[medium] => Array 
( 
[file] => nggallery-example1-256x130.jpg 
[width] => 256 
[height] => 130 
) 

) 

[image_meta] => Array 
( 
[aperture] => 0 
[credit] => 
[camera] => 
[caption] => 
[created_timestamp] => 0 
[copyright] => 
[focal_length] => 0 
[iso] => 0 
[shutter_speed] => 0 
[title] => 
) 

) 

When the file is "thumbnail", "medium" or "large" – or any other combination then we need to add the directory information from the "file" to the selected file. When the thumbnail parameter is a numeric [size] array we need to search the [sizes] array to try to find the best match for the specified size.

Usage

$string = bw_get_attached_file_name( $post_id, $atts );

Parameters

$post_id

( integer ) required – the ID of the attachment post

$atts

( array ) required – attributes containing the specified thumbnail size.

Returns

string $image – the URL for the attached image

Source

File name: oik-nivo-slider/nivo.php
Lines:

function bw_get_attached_file_name( $post_id, $atts ) {
  $size = bw_array_get( $atts, "thumbnail", "full" );
  bw_trace2( $size, "size" );
  $image = null;
  switch ( $size ) { 
    case 'full':
      $images = get_post_custom_values( "_wp_attached_file", $post_id );  
      //bw_trace2( $images ); 
      if ( $images ) {
         $image = $images[0];
      } else { 
        $image = null;
      }
    break; 
    
    default:
      $size = bw_get_thumbnail_size( $atts );
      $image = bw_get_best_fit( $post_id, $size );
      bw_trace2( $image, "got_image", false ); 
    break;
  }
  if ( $image ) {
    $upload_dir = wp_upload_dir();
    $image = $upload_dir['baseurl'] . '/' . $image;
  }
  // bw_trace2( $image, "attached_image", false ); 
  return( $image );
}
 

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