get_metadata_raw( string $meta_type, int $object_id, string $meta_key = '', bool $single = false )
Retrieves raw metadata value for the specified object.
Parameters
- $meta_type
-
(Required) Type of object metadata is for. Accepts 'post', 'comment', 'term', 'user', or any other object type with an associated meta table.
- $object_id
-
(Required) ID of the object metadata is for.
- $meta_key
-
(Optional) Metadata key. If not specified, retrieve all metadata for the specified object.
Default value: ''
- $single
-
(Optional) If true, return only the first value of the specified
$meta_key
.<br> This parameter has no effect if$meta_key
is not specified.Default value: false
Return
(mixed) An array of values if $single
is false.<br> The value of the meta field if $single
is true.<br> False for an invalid $object_id
(non-numeric, zero, or negative value), or if $meta_type
is not specified.<br> Null if the value does not exist.
Source
File: wp-includes/meta.php
function get_metadata_raw( $meta_type, $object_id, $meta_key = '', $single = false ) {
if ( ! $meta_type || ! is_numeric( $object_id ) ) {
return false;
}
$object_id = absint( $object_id );
if ( ! $object_id ) {
return false;
}
/**
* Short-circuits the return value of a meta field.
*
* The dynamic portion of the hook name, `$meta_type`, refers to the meta object type
* (post, comment, term, user, or any other type with an associated meta table).
* Returning a non-null value will effectively short-circuit the function.
*
* Possible filter names include:
*
* - `get_post_metadata`
* - `get_comment_metadata`
* - `get_term_metadata`
* - `get_user_metadata`
*
* @since 3.1.0
* @since 5.5.0 Added the `$meta_type` parameter.
*
* @param mixed $value The value to return, either a single metadata value or an array
* of values depending on the value of `$single`. Default null.
* @param int $object_id ID of the object metadata is for.
* @param string $meta_key Metadata key.
* @param bool $single Whether to return only the first value of the specified `$meta_key`.
* @param string $meta_type Type of object metadata is for. Accepts 'post', 'comment', 'term', 'user',
* or any other object type with an associated meta table.
*/
$check = apply_filters( "get_{$meta_type}_metadata", null, $object_id, $meta_key, $single, $meta_type );
if ( null !== $check ) {
if ( $single && is_array( $check ) ) {
return $check[0];
} else {
return $check;
}
}
$meta_cache = wp_cache_get( $object_id, $meta_type . '_meta' );
if ( ! $meta_cache ) {
$meta_cache = update_meta_cache( $meta_type, array( $object_id ) );
if ( isset( $meta_cache[ $object_id ] ) ) {
$meta_cache = $meta_cache[ $object_id ];
} else {
$meta_cache = null;
}
}
if ( ! $meta_key ) {
return $meta_cache;
}
if ( isset( $meta_cache[ $meta_key ] ) ) {
if ( $single ) {
return maybe_unserialize( $meta_cache[ $meta_key ][0] );
} else {
return array_map( 'maybe_unserialize', $meta_cache[ $meta_key ] );
}
}
return null;
}
Changelog
Version | Description |
---|---|
5.5.0 | Introduced. |