Question

Warning: This function has been deprecated. Use get_user_meta() instead.

get_usermeta( int $user_id,  string $meta_key = '' )

Retrieve user metadata.

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description

If $user_id is not a number, then the function will fail over with a ‘false’ boolean return value. Other returned values depend on whether there is only one item to be returned, which be that single item type. If there is more than one metadata value, then it will be list of metadata values.

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参数

$user_id

(int) (Required) User ID

$meta_key

(string) (Optional) Metadata key.

Default value: ''

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返回值

(mixed)

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源代码

File: wp-includes/deprecated.php

function get_usermeta( $user_id, $meta_key = '' ) {
	_deprecated_function( __FUNCTION__, '3.0.0', 'get_user_meta()' );
	global $wpdb;
	$user_id = (int) $user_id;

	if ( !$user_id )
		return false;

	if ( !empty($meta_key) ) {
		$meta_key = preg_replace('|[^a-z0-9_]|i', '', $meta_key);
		$user = wp_cache_get($user_id, 'users');
		// Check the cached user object
		if ( false !== $user && isset($user->$meta_key) )
			$metas = array($user->$meta_key);
		else
			$metas = $wpdb->get_col( $wpdb->prepare("SELECT meta_value FROM $wpdb->usermeta WHERE user_id = %d AND meta_key = %s", $user_id, $meta_key) );
	} else {
		$metas = $wpdb->get_col( $wpdb->prepare("SELECT meta_value FROM $wpdb->usermeta WHERE user_id = %d", $user_id) );
	}

	if ( empty($metas) ) {
		if ( empty($meta_key) )
			return array();
		else
			return '';
	}

	$metas = array_map('maybe_unserialize', $metas);

	if ( count($metas) == 1 )
		return $metas[0];
	else
		return $metas;
}

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更新日志

Version	description
3.0.0	Use get_user_meta()
2.0.0	Introduced.

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相关函数

Uses

• wp-includes/cache.php: wp_cache_get()
• wp-includes/functions.php: _deprecated_function()
• wp-includes/wp-db.php: wpdb::get_col()
• wp-includes/wp-db.php: wpdb::prepare()

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User Contributed Notes