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<?php
/**
* @package ACF
* @author WP Engine
*
* © 2025 Advanced Custom Fields (ACF®). All rights reserved.
* "ACF" is a trademark of WP Engine.
* Licensed under the GNU General Public License v2 or later.
* https://www.gnu.org/licenses/gpl-2.0.html
*/
namespace ACF\Meta;
/**
* The MetaType base class.
*/
class MetaLocation {
/**
* The unique slug/name of the meta location.
*
* @var string
*/
public string $location_type = '';
/**
* The prefix to use for ACF reference keys/hidden meta.
*
* @var string
*/
public string $reference_prefix = '_';
/**
* Constructs the location.
*
* @since 6.4
*/
public function __construct() {
$this->register();
}
/**
* Registers the meta location with ACF, so it can be used by
* various CRUD helper functions.
*
* @since 6.4
*
* @return void
*/
public function register() {
if ( empty( $this->location_type ) ) {
return;
}
$store = acf_get_store( 'acf-meta-locations' );
if ( ! $store ) {
$store = acf_register_store( 'acf-meta-locations' );
}
$store->set( $this->location_type, get_class( $this ) );
}
/**
* Retrieves all ACF meta for the provided object ID.
*
* @since 6.4
*
* @param integer|string $object_id The ID of the object to get meta from.
* @return array
*/
public function get_meta( $object_id = 0 ): array {
$meta = array();
$all_meta = get_metadata( $this->location_type, $object_id );
if ( $all_meta ) {
foreach ( $all_meta as $key => $value ) {
// If a reference exists for this value, add it to the meta array.
if ( isset( $all_meta[ $this->reference_prefix . $key ] ) ) {
$meta[ $key ] = $value[0];
$meta[ $this->reference_prefix . $key ] = $all_meta[ $this->reference_prefix . $key ][0];
}
}
}
// Unserialize results and return.
return array_map( 'acf_maybe_unserialize', $meta );
}
/**
* Retrieves a field value from the database.
*
* @since 6.4
*
* @param integer|string $object_id The ID of the object the metadata is for.
* @param array $field The field array.
* @return mixed
*/
public function get_value( $object_id = 0, array $field = array() ) {
$meta = get_metadata( $this->location_type, $object_id, $field['name'] );
return $meta[0] ?? null;
}
/**
* Gets a reference key for the provided field name.
*
* @since 6.4
*
* @param integer|string $object_id The ID of the object to get the reference key from.
* @param string $field_name The name of the field to get the reference for.
* @return string|null
*/
public function get_reference( $object_id = 0, $field_name = '' ) {
$reference = get_metadata( $this->location_type, $object_id, $this->reference_prefix . $field_name );
return $reference[0] ?? null;
}
/**
* Updates an object ID with the provided meta array.
*
* @since 6.4
*
* @param integer|string $object_id The ID of the object the metadata is for.
* @param array $meta The metadata to save to the object.
* @return void
*/
public function update_meta( $object_id = 0, array $meta = array() ) {
// Slash data. WP expects all data to be slashed and will unslash it (fixes '\' character issues).
$meta = wp_slash( $meta );
foreach ( $meta as $name => $value ) {
update_metadata( $this->location_type, $object_id, $name, $value );
}
}
/**
* Updates a field value in the database.
*
* @since 6.4
*
* @param integer|string $object_id The ID of the object the metadata is for.
* @param array $field The field array.
* @param mixed $value The metadata value.
* @return integer|boolean
*/
public function update_value( $object_id = 0, array $field = array(), $value = '' ) {
return update_metadata( $this->location_type, $object_id, $field['name'], $value );
}
/**
* Updates a reference key in the database.
*
* @since 6.4
*
* @param integer|string $object_id The ID of the object the metadata is for.
* @param string $field_name The name of the field to update the reference for.
* @param string $value The value of the reference key.
* @return integer|boolean
*/
public function update_reference( $object_id = 0, string $field_name = '', string $value = '' ) {
return update_metadata( $this->location_type, $object_id, $this->reference_prefix . $field_name, $value );
}
/**
* Deletes a field value from the database.
*
* @since 6.4
*
* @param integer|string $object_id The ID of the object the metadata is for.
* @param array $field The field array.
* @return boolean
*/
public function delete_value( $object_id = 0, array $field = array() ): bool {
return delete_metadata( $this->location_type, $object_id, $field['name'] );
}
/**
* Deletes a reference key from the database.
*
* @since 6.4
*
* @param integer|string $object_id The ID of the object the metadata is for.
* @param string $field_name The name of the field to delete the reference from.
* @return boolean
*/
public function delete_reference( $object_id = 0, string $field_name = '' ): bool {
return delete_metadata( $this->location_type, $object_id, $this->reference_prefix . $field_name );
}
}