rwmb_set_meta

rwmb_set_meta is a helper function that helps you to set value for a field.

Arguments

This function accepts 4 parameters as follows:

rwmb_set_meta( $object_id, $field_id, $value, $args = [] );

Parameter	Description
$object_id	Object (post, term, user) ID. If you need to set value for an option (using MB Settings Page), object ID is the option name.
$field_id	Field ID.
$value	Value. Should be compatible with field value format. See database.
$args	Extra arguments for some object types or storages. It works similarly in rwmb_meta function. Can be array or a string in format param1=value1¶m2=value2. Optional.

caution

This function works only when the field is already registered. In Meta Box, fields are registered at hook init with priority 20. So, you need to run this function after that:

add_action( 'init', function() {
    rwmb_set_meta( 12, 'my_field', 'my_value' );
}, 99 );

Examples

Setting a field value for a post:

add_action( 'init', function() {
    $post_id = 123;
    $field_id = 'my_field';
    $value = 'My custom value';
    rwmb_set_meta( $post_id, $field_id, $value );
}, 99 );

Setting a cloneable group value for a post:

add_action( 'init', function() {
    $post_id = 123;
    $field_id = 'my_field';
    $value = [
        [
            'name' => 'Andy',
            'email' => '[email protected]',
        ],
        [
            'name' => 'Bruce',
            'email' => '[email protected]',
        ],
    ];
    rwmb_set_meta( $post_id, $field_id, $value );
}, 99 );

Setting a field value for a term:

add_action( 'init', function() {
    $term_id = 123;
    $field_id = 'my_field';
    $value = 'My custom value';
    $args = [ 'object_type' => 'term' ];
    rwmb_set_meta( $term_id, $field_id, $value, $args );
}, 99 );

Setting a field value for a user:

add_action( 'init', function() {
    $user_id = 123;
    $field_id = 'my_field';
    $value = 'My custom value';
    $args = [ 'object_type' => 'user' ];
    rwmb_set_meta( $user_id, $field_id, $value, $args );
}, 99 );

Setting a field value for a settings page:

add_action( 'init', function() {
    $option_name = 'my_option';
    $field_id = 'my_field';
    $value = 'My custom value';
    $args = [ 'object_type' => 'setting' ];
    rwmb_set_meta( $option_name, $field_id, $value, $args );
}, 99 );

Setting a field value with custom table:

add_action( 'init', function() {
    $table_name = 'my_table';
    $post_id = 123;
    $field_id = 'my_field';
    $value = 'My custom value';
    $args = [
        'storage_type' => 'custom_table',
        'table'        => $table_name,
    ];
    rwmb_set_meta( $post_id, $field_id, $value, $args );
}, 99 );