update_user_meta

函数



      update_user_meta ( $user_id, $meta_key, $meta_value, $prev_value = '' )

参数

(int)
$user_id
User ID.
Required: 是
(string)
$meta_key
Metadata key.
Required: 是
(mixed)
$meta_value
Metadata value. Must be serializable if non-scalar.
Required: 是
(mixed)
$prev_value
Optional. Previous value to check before updating. If specified, only update existing metadata entries with this value. Otherwise, update all entries. Default empty.
Required: 否

Default: (empty)

返回值

(int|bool) Meta ID if the key didn’t exist, true on successful update, false on failure or if the value passed to the function is the same as the one that is already in the database.

定义位置

wp-includes/user.php
, line 1184

引入: 3.0.0

弃用: –

Updates user meta field based on user ID.

Use the $prev_value parameter to differentiate between meta fields with the
same key and user ID.

If the meta field for the user does not exist, it will be added.

function update_user_meta( $user_id, $meta_key, $meta_value, $prev_value = '' ) {
	return update_metadata( 'user', $user_id, $meta_key, $meta_value, $prev_value );
}

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