too long

Question

I have a multiple=multiple drop down list and I want to check if a user has selected any option or not using PHP code. If not, then I want to display an error message. How can I do that?

<select name="ddlskill" multiple="multiple">
    <option value="Cake PHP">Cake PHP</option>
    <option value="Database">Database</option>
    <option value="hello">hello</option>
    <option value="Java">Java</option>
    <option value="Jquery">Jquery</option>
    <option value="JSON">JSON</option>
    <option value="JSP">JSP</option>
    <option value="Mysql">Mysql</option>
    <option value="PHP">PHP</option>
    <option value="xyz">xyz</option>
    <option value="XYZ2">XYZ2</option>                
</select>

Answer 1

You should declare your html like this :

<select name="ddlskill[]" multiple="multiple">
    <option value="Cake PHP">Cake PHP</option>
    <option value="Database">Database</option>
    <option value="hello">hello</option>
    <option value="Java">Java</option>
    <option value="Jquery">Jquery</option>
    <option value="JSON">JSON</option>
    <option value="JSP">JSP</option>
    <option value="Mysql">Mysql</option>
    <option value="PHP">PHP</option>
    <option value="xyz">xyz</option>
    <option value="XYZ2">XYZ2</option>   
</select>

And then in PHP, you'll get an array of values :

if( !empty($_POST['ddlskill']) ){
    print_r($_POST['ddlskill']);
    // [PHP, JSP, Java, ...]
}