更新已添加的选项的值。
原型
update_option( string $option, mixed $value, string|bool $autoload = null )
描述
你不需要序列化值。如果值需要序列化,则在将其插入数据库之前将序列化。请记住,资源无法序列化或作为选项添加。
参数
$option
(string)
(Required)
选项名称。预计不会被SQL转义。
$value
(mixed)
(Required)
期权价值。如果是非标量,则必须可序列化。预计不会被SQL转义。
$autoload
(string|bool)
(Optional)
是否在WordPress启动时加载选项。对于现有选项,如果$ value也更改,则只能使用update_option()更新$ autoload。接受’yes’| true表示启用或’no’| false表示禁用。对于不存在的选项,默认值为“yes”。
返回值
(bool)
如果未更新值,则返回false,如果更新值,则返回true。
源文件
路径:wp-includes/option.php
<?php
...
function update_option( $option, $value, $autoload = null ) {
global $wpdb;
$option = trim($option);
if ( empty($option) )
return false;
wp_protect_special_option( $option );
if ( is_object( $value ) )
$value = clone $value;
$value = sanitize_option( $option, $value );
$old_value = get_option( $option );
/**
* Filters a specific option before its value is (maybe) serialized and updated.
*
* The dynamic portion of the hook name, `$option`, refers to the option name.
*
* @since 2.6.0
* @since 4.4.0 The `$option` parameter was added.
*
* @param mixed $value The new, unserialized option value.
* @param mixed $old_value The old option value.
* @param string $option Option name.
*/
$value = apply_filters( "pre_update_option_{$option}", $value, $old_value, $option );
/**
* Filters an option before its value is (maybe) serialized and updated.
*
* @since 3.9.0
*
* @param mixed $value The new, unserialized option value.
* @param string $option Name of the option.
* @param mixed $old_value The old option value.
*/
$value = apply_filters( 'pre_update_option', $value, $option, $old_value );
/*
* If the new and old values are the same, no need to update.
*
* Unserialized values will be adequate in most cases. If the unserialized
* data differs, the (maybe) serialized data is checked to avoid
* unnecessary database calls for otherwise identical object instances.
*
* See https://core.trac.wordpress.org/ticket/38903
*/
if ( $value === $old_value || maybe_serialize( $value ) === maybe_serialize( $old_value ) ) {
return false;
}
/** This filter is documented in wp-includes/option.php */
if ( apply_filters( "default_option_{$option}", false, $option, false ) === $old_value ) {
// Default setting for new options is 'yes'.
if ( null === $autoload ) {
$autoload = 'yes';
}
return add_option( $option, $value, '', $autoload );
}
$serialized_value = maybe_serialize( $value );
/**
* Fires immediately before an option value is updated.
*
* @since 2.9.0
*
* @param string $option Name of the option to update.
* @param mixed $old_value The old option value.
* @param mixed $value The new option value.
*/
do_action( 'update_option', $option, $old_value, $value );
$update_args = array(
'option_value' => $serialized_value,
);
if ( null !== $autoload ) {
$update_args['autoload'] = ( 'no' === $autoload || false === $autoload ) ? 'no' : 'yes';
}
$result = $wpdb->update( $wpdb->options, $update_args, array( 'option_name' => $option ) );
if ( ! $result )
return false;
$notoptions = wp_cache_get( 'notoptions', 'options' );
if ( is_array( $notoptions ) && isset( $notoptions[$option] ) ) {
unset( $notoptions[$option] );
wp_cache_set( 'notoptions', $notoptions, 'options' );
}
if ( ! wp_installing() ) {
$alloptions = wp_load_alloptions();
if ( isset( $alloptions[$option] ) ) {
$alloptions[ $option ] = $serialized_value;
wp_cache_set( 'alloptions', $alloptions, 'options' );
} else {
wp_cache_set( $option, $serialized_value, 'options' );
}
}
/**
* Fires after the value of a specific option has been successfully updated.
*
* The dynamic portion of the hook name, `$option`, refers to the option name.
*
* @since 2.0.1
* @since 4.4.0 The `$option` parameter was added.
*
* @param mixed $old_value The old option value.
* @param mixed $value The new option value.
* @param string $option Option name.
*/
do_action( "update_option_{$option}", $old_value, $value, $option );
/**
* Fires after the value of an option has been successfully updated.
*
* @since 2.9.0
*
* @param string $option Name of the updated option.
* @param mixed $old_value The old option value.
* @param mixed $value The new option value.
*/
do_action( 'updated_option', $option, $old_value, $value );
return true;
}
...
?>
其他
英文文档:https://developer.wordpress.org/reference/functions/update_option/