php 从多选，多行保存数据

Question

我有一个多选输入，我需要将选择保存到数据库。1 个选定的student_id = 数据库中的 I 行。我该怎么做？视图：<select select class="js-example-basic-multiple" name="student_id" multiple="multiple" id="student_id" style="width: 100%;">    <option value="">Select student</option></select>控制器：$student_id = $this->input->post(['student_id']);array( "student_id"=>$student_id,感谢您的帮助

Answer 1

这应该有效

<select name="student_id[]" size="10" multiple="multiple">

$str = '';

foreach ($_POST['student_id'] as $student) {

    $str .= $student;

}

$imploded_ids = implode(',', $str);

$student_id = $this->input->post(['student_id']);

 array( "student_id"=>$imploded_ids,

编辑：

$iddss = $_POST['student_id'] ; //Take the array of ids.

$values = array() ;

foreach($iddss as $str){

  $values[] = $str;

}

$LastValue = implode(",", $values);

$student_id = $this->input->post(['student_id']);

       array("student_id"=>$LastValue,

IDD 的使用结果