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Upload Multiple Files or Images in Codeigniter using Ajax JQuery 

class Upload_multiple extends CI_Controller {
 
 function index()
 {
  $this->load->view("upload_multiple");
 }

<div class="col-md-6" align="right">
  <label>Select Multiple Files</label>
 </div>
 <div class="col-md-6">
  <input type="file" name="files" id="files" multiple />
 </div>
 <div style="clear:both"></div>
 <br />
 <br />
 <div id="uploaded_images"></div>

$('#files').change(function(){
  var files = $('#files')[0].files;
  var error = '';
  var form_data = new FormData();
  for(var count = 0; count<files.length; count++)
  {
   var name = files[count].name;
   var extension = name.split('.').pop().toLowerCase();
   if(jQuery.inArray(extension, ['gif','png','jpg','jpeg']) == -1)
   {
    error += "Invalid " + count + " Image File"
   }
   else
   {
    form_data.append("files[]", files[count]);
   }
  }
  if(error == '')
  {
   $.ajax({
    url:"<?php echo base_url(); ?>upload_multiple/upload", //base_url() return http://localhost/tutorial/codeigniter/
    method:"POST",
    data:form_data,
    contentType:false,
    cache:false,
    processData:false,
    beforeSend:function()
    {
     $('#uploaded_images').html("<label class='text-success'>Uploading...</label>");
    },
    success:function(data)
    {
     $('#uploaded_images').html(data);
     $('#files').val('');
    }
   })
  }
  else
  {
   alert(error);
  }
 });

function upload()
 {
  sleep(3);
  if($_FILES["files"]["name"] != '')
  {
   $output = '';
   $config["upload_path"] = './upload/';
   $config["allowed_types"] = 'gif|jpg|png';
   $this->load->library('upload', $config);
   $this->upload->initialize($config);
   for($count = 0; $count<count($_FILES["files"]["name"]); $count++)
   {
    $_FILES["file"]["name"] = $_FILES["files"]["name"][$count];
    $_FILES["file"]["type"] = $_FILES["files"]["type"][$count];
    $_FILES["file"]["tmp_name"] = $_FILES["files"]["tmp_name"][$count];
    $_FILES["file"]["error"] = $_FILES["files"]["error"][$count];
    $_FILES["file"]["size"] = $_FILES["files"]["size"][$count];
    if($this->upload->do_upload('file'))
    {
     $data = $this->upload->data();
     $output .= '
     <div class="col-md-3">
      <img src="'.base_url().'upload/'.$data["file_name"].'" class="img-responsive img-thumbnail" />
     </div>
     ';
    }
   }
   echo $output;   
  }
 }




Controllers - Upload_multiple.php




<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Upload_multiple extends CI_Controller {
 
 function index()
 {
  $this->load->view("upload_multiple");
 }

 function upload()
 {
  sleep(3);
  if($_FILES["files"]["name"] != '')
  {
   $output = '';
   $config["upload_path"] = './upload/';
   $config["allowed_types"] = 'gif|jpg|png';
   $this->load->library('upload', $config);
   $this->upload->initialize($config);
   for($count = 0; $count<count($_FILES["files"]["name"]); $count++)
   {
    $_FILES["file"]["name"] = $_FILES["files"]["name"][$count];
    $_FILES["file"]["type"] = $_FILES["files"]["type"][$count];
    $_FILES["file"]["tmp_name"] = $_FILES["files"]["tmp_name"][$count];
    $_FILES["file"]["error"] = $_FILES["files"]["error"][$count];
    $_FILES["file"]["size"] = $_FILES["files"]["size"][$count];
    if($this->upload->do_upload('file'))
    {
     $data = $this->upload->data();
     $output .= '
     <div class="col-md-3">
      <img src="'.base_url().'upload/'.$data["file_name"].'" class="img-responsive img-thumbnail" />
     </div>
     ';
    }
   }
   echo $output;   
  }
 }
}








Views - upload_multiple.php




<html>
<head>
    <title>Upload Multiple Files in Codeigniter using Ajax JQuery</title>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" />
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
</head>
<body>
<div class="container">
 <br /><br /><br />
 <h3 align="center">Upload Multiple Files in Codeigniter using Ajax JQuery</h3><br />
 
 <div class="col-md-6" align="right">
  <label>Select Multiple Files</label>
 </div>
 <div class="col-md-6">
  <input type="file" name="files" id="files" multiple />
 </div>
 <div style="clear:both"></div>
 <br />
 <br />
 <div id="uploaded_images"></div>
</div>
</body>
</html>
<script>
$(document).ready(function(){
 $('#files').change(function(){
  var files = $('#files')[0].files;
  var error = '';
  var form_data = new FormData();
  for(var count = 0; count<files.length; count++)
  {
   var name = files[count].name;
   var extension = name.split('.').pop().toLowerCase();
   if(jQuery.inArray(extension, ['gif','png','jpg','jpeg']) == -1)
   {
    error += "Invalid " + count + " Image File"
   }
   else
   {
    form_data.append("files[]", files[count]);
   }
  }
  if(error == '')
  {
   $.ajax({
    url:"<?php echo base_url(); ?>upload_multiple/upload", //base_url() return http://localhost/tutorial/codeigniter/
    method:"POST",
    data:form_data,
    contentType:false,
    cache:false,
    processData:false,
    beforeSend:function()
    {
     $('#uploaded_images').html("<label class='text-success'>Uploading...</label>");
    },
    success:function(data)
    {
     $('#uploaded_images').html(data);
     $('#files').val('');
    }
   })
  }
  else
  {
   alert(error);
  }
 });
});
</script>

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