title: How to show wordpress setting api validation error message?
body: <p>I have created a setting api for my new plugin. It has four <code>&lt;input&gt;</code> field and one <code>&lt;select&gt;</code> option. In that field , user can change value according to their requirement. But it must be valid value. Suppose , one <code>&lt;input&gt;</code> field support only integer value. so when user will fill that <code>&lt;input&gt;</code> field by string or by other things, it will show an error message. Please tell me how can i do that? Can you suggest any tutorial ?</p>