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Description

Retrieves taxonomies attached to given the attachment.

Usage

$string[]|WP_Taxonomy[] = get_attachment_taxonomies( $attachment, $output );

Parameters

$attachment

( int|array|object ) required – Attachment ID, data array, or data object.

$output

( string ) optional default: names – Output type. 'names' to return an array of taxonomy names, or 'objects' to return an array of taxonomy objects. Default is 'names'.

Returns

string[]|WP_Taxonomy[] List of taxonomies or taxonomy names. Empty array on failure.

Source

File name: wordpress/wp-includes/media.php
Lines:

function get_attachment_taxonomies( $attachment, $output = 'names' ) {
  if ( is_int( $attachment ) ) {
    $attachment = get_post( $attachment );
  } elseif ( is_array( $attachment ) ) {
    $attachment = (object) $attachment;
  }

  if ( ! is_object( $attachment ) ) {
    return array();
  }

  $file     = get_attached_file( $attachment->ID );
  $filename = wp_basename( $file );

  $objects = array( 'attachment' );

  if ( false !== strpos( $filename, '.' ) ) {
    $objects[] = 'attachment:' . substr( $filename, strrpos( $filename, '.' ) + 1 );
  }

  if ( ! empty( $attachment->post_mime_type ) ) {
    $objects[] = 'attachment:' . $attachment->post_mime_type;

    if ( false !== strpos( $attachment->post_mime_type, '/' ) ) {
      foreach ( explode( '/', $attachment->post_mime_type ) as $token ) {
        if ( ! empty( $token ) ) {
          $objects[] = "attachment:$token";
        }
      }
    }
  }

  $taxonomies = array();

  foreach ( $objects as $object ) {
    $taxes = get_object_taxonomies( $object, $output );

    if ( $taxes ) {
      $taxonomies = array_merge( $taxonomies, $taxes );
    }
  }

  if ( 'names' === $output ) {
    $taxonomies = array_unique( $taxonomies );
  }

  return $taxonomies;
}
 

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