Value of Multiple select input text field in CodeIgniter controller - php

Question

How can I get the value of a multiple select input field in CodeIgniter controller?
I want a multiple select input field shown here
I have added below html code.
<select class="js-example-basic-multiple multiple_selection form-control" name="student[]" multiple="multiple" >
<option value="1">Student1</option>
<option value="2">Student2</option>
<option value="3">Student3</option>
<option value="4">Student4</option>
<option value="5">Student5</option>
<option value="6">Student6</option>
</select>
I am using given code to fetch the value of this input field. But I didn't get the value.
$studentname = array();
$studentname =$this->input->post('student[]');
echo 'studentName:'.$studentname;
Do you have any suggestions?

Answer 1

Your values will be posted in an array:
$studentNames = $this->input->post('student');
You can then access each value using loop:
foreach($studentNames as $name){
echo "Student name is $name";
}

Answer 2

there is no need to use [] while you are echoing post value, you already define in name='student[]';
$studentname =$this->input->post('student');
echo "<pre>";
print_r($studentname);
echo "</pre>";

Answer 3

for naming sake make it student students since its a multislect
<select class="js-example-basic-multiple multiple_selection form-control" name="students[]" multiple="multiple" >
<option value="1">Student1</option>
<option value="2">Student2</option>
<option value="3">Student3</option>
<option value="4">Student4</option>
<option value="5">Student5</option>
<option value="6">Student6</option>
</select>
in controller:
//get the post values of students (if you dump the post you will see that $_POST['students'] is an array
$students = $this->input->post('students');
https://www.codeigniter.com/user_guide/libraries/input.html
//will contain the values of the selected students ex. var_dump($students) will produce [1,2,4];
//you will need to loop over students since it is an array
foreach($students as $id){
echo "Student id is {$id}";
}