get_attachment_taxonomies( int|array|object $attachment, string $output = 'names' ): string[]|WP_Taxonomy[]

Compatibility

Present in every tracked release (6.7.7 to 7.1.0), and compiles on PHP 7.4 through 8.6-dev.

Parameters

$attachmentint|array|object

Attachment ID, data array, or data object.

$outputstringoptional

Output type. 'names' to return an array of taxonomy names, or 'objects' to return an array of taxonomy objects.
Default is 'names'.Default: 'names'

Return value

string[]|WP_Taxonomy[]

List of taxonomies or taxonomy names. Empty array on failure.

Performance profile

How much work a call to get_attachment_taxonomies() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.

Cost class

Heavy

Reaches the database via get_post().

Scaling

Scales with input

The body loops, so the work grows with what you pass in.

Instructions

9–61

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 84.

Plugin surface

None

Nothing here hands control to plugin code.

Called by

5

5 places in core call this, so the cost is paid more often than your own code shows.

What it touches

• querycontent queryget_post()called directly
• hookthird-party callbacksapply_filters()one call below get_attachment_taxonomies()

Further down the call graph this can also reach cache, serialize, option and transient. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.

What one call costs · 18 distinct outcomes

One number would be a lie: the work depends on which branch runs. These are every distinct cost get_attachment_taxonomies() can have, taken from its control-flow graph on PHP 8.5.

Uses · 5

• get_post()Retrieves post data given a post ID or post object.
• get_attached_file()Retrieves attached file path based on attachment ID.
• wp_basename()i18n-friendly version of basename().
• str_contains()Polyfill for `str_contains()` function added in PHP 8.0.
• get_object_taxonomies()Returns the names or objects of the taxonomies which are registered for the requested object or object type, such as a post object or post type name.

Used by · 5

• get_attachment_fields_to_edit()Retrieves the attachment fields to edit form fields.
• get_compat_media_markup()Retrieves the media markup for an attachment.
• get_object_taxonomies()Returns the names or objects of the taxonomies which are registered for the requested object or object type, such as a post object or post type name.
• media_upload_form_handler()Handles form submissions for the legacy media uploader.
• wp_ajax_save_attachment_compat()Handles saving backward compatible attachment attributes via AJAX.

Source code

View on Trac ↗View on GitHub ↗

4164function get_attachment_taxonomies( $attachment, $output = 'names' ) {4165	if ( is_int( $attachment ) ) {4166		$attachment = get_post( $attachment );4167	} elseif ( is_array( $attachment ) ) {4168		$attachment = (object) $attachment;4169	}4170 4171	if ( ! is_object( $attachment ) ) {4172		return array();4173	}4174 4175	$file     = get_attached_file( $attachment->ID );4176	$filename = wp_basename( $file );4177 4178	$objects = array( 'attachment' );4179 4180	if ( str_contains( $filename, '.' ) ) {4181		$objects[] = 'attachment:' . substr( $filename, strrpos( $filename, '.' ) + 1 );4182	}4183 4184	if ( ! empty( $attachment->post_mime_type ) ) {4185		$objects[] = 'attachment:' . $attachment->post_mime_type;4186 4187		if ( str_contains( $attachment->post_mime_type, '/' ) ) {4188			foreach ( explode( '/', $attachment->post_mime_type ) as $token ) {4189				if ( ! empty( $token ) ) {4190					$objects[] = "attachment:$token";4191				}4192			}4193		}4194	}4195 4196	$taxonomies = array();4197 4198	foreach ( $objects as $object ) {4199		$taxes = get_object_taxonomies( $object, $output );4200 4201		if ( $taxes ) {4202			$taxonomies = array_merge( $taxonomies, $taxes );4203		}4204	}4205 4206	if ( 'names' === $output ) {4207		$taxonomies = array_unique( $taxonomies );4208	}4209 4210	return $taxonomies;4211}

Changelog

Introduced in 4.7.0. Unchanged from 6.7.7 through 7.1.0.

1. 6.7.7
2. 6.8.8
3. 6.9.7
4. 7.0.4
5. 7.1.0

Signature, return type and hooks compared across 5 parsed releases.

About this page

Parsed data

Generated from the wordpress-develop 7.1.0 tag, from src/wp-includes/media.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

Something wrong on this page? Report it and it gets fixed in the next regeneration.