如何使用PHP进行多选选项？

Question

我喜欢使用PHP做多个选择选项，但我无法做多个选择。

<div class="col-md-6">           
        <label>Department</label>
            <div >
            <?php                                                     
            $options["1"] =  'Production';
            $options["2"] =  'Quality';
            $options["3"] =  'Admin';                               
            echo form_dropdown('distriList',$options,set_value('distriList'), 'id="distriList"'  ,'class="form-control required"','required="true"','multiple ="multiple"');  
            ?>                       
            </div>
    </div>

Answer 1

您应该使用form_multiselect代替from_dropdown

form_multiselect([$name = ''[, $options = array()[, $selected = array()[, $extra = '']]]])

https://www.codeigniter.com/userguide3/helpers/form_helper.html#form_multiselect

Answer 2

coloursubstr "$s" 2 7