WP_INSERT_USER未返回任何内容

我打电话时使用的是Wordpress 4.5.3wp_insert_user, 它可以正常工作，用户可以正常创建，但它不会返回ID，甚至不会返回错误。

测验php

$userdata = array(
    \'user_login\' => esc_attr($this->username),
    \'user_email\' => esc_attr($this->email),
    \'user_pass\' => esc_attr($this->password),
    \'first_name\' => esc_attr($this->first_name),
    \'display_name\' => esc_attr($this->tagline)
);
echo "Test 1";
$register_user = wp_insert_user($userdata);
echo "Test 2"; //This does not echo. Script stops running?

然后我打开了wp-includes/user。php并编辑了以下内容：

$user = new WP_User( $user_id );

$meta = apply_filters( \'insert_user_meta\', $meta, $user, $update );

foreach ( $meta as $key => $value ) {
    update_user_meta( $user_id, $key, $value );
}

foreach ( wp_get_user_contact_methods( $user ) as $key => $value ) {
    if ( isset( $userdata[ $key ] ) ) {
        update_user_meta( $user_id, $key, $userdata[ $key ] );
    }
}

if ( isset( $userdata[\'role\'] ) ) {
    $user->set_role( $userdata[\'role\'] );
} elseif ( ! $update ) {
    $user->set_role(get_option(\'default_role\'));
}
wp_cache_delete( $user_id, \'users\' );
wp_cache_delete( $user_login, \'userlogins\' );

if ( $update ) {
    do_action( \'profile_update\', $user_id, $old_user_data );
} else {
    return $user_id; // I ADDED THIS FOR TEST PURPOSES. IT WORKS, IT RETURNS THE ID
    do_action( \'user_register\', $user_id );
}

return $user_id; // THIS IS WHERE IT SHOULD RETURN THE ID

我成功地编辑了用户。php，但我不想在更新Wordpress网站时弄乱核心，以免出现问题。

有人能确认这是一个bug，还是我做错了什么吗？

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