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File Upload using Codeigniter AJAX


Step 1Create a uploads folder in root directory

Step 2Create the Attachment.php(Controller) file

Step 3Create the create_attachment.php(View) File

Step 4Create the AttachmentModel.php(Model) File

Attachment.php(Controller)

<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class Attachment extends CI_Controller {

	public function __construct()
    {
		parent::__construct();
		$this->load->model('attachmentmodel');
	
    }
    public function CreateAttachment(){
		$page_data['page_title'] = 'Create Attachment';
		$page_data['page_name'] = "attachment/create_attachment";
		$this->load->view('backend/index', $page_data);
	}
    public function ManageAttachment(){
            extract($this->input->post());
            $data['Title']=$Title;
            $config['upload_path'] = './uploads/';
            $config['allowed_types'] = 'jpg|png';
            $config['max_size']             = 100;
            $config['max_width']            = 1024;
            $config['max_height']           = 768;
            $this->load->library('upload', $config);
            if ( ! $this->upload->do_upload('file'))
            {
                    $error = array('error' => $this->upload->display_errors());
            }
            else
            {
                    $filedata =  $this->upload->data();
                    
            }
            $data['Logo']=$filedata['file_name'];
            $data['Path']=$filedata['file_path'];
            $response=$this->attachmentmodel->ManageAttachment($data,1);
            if($response){
            $this->output
                ->set_status_header(200)
                ->set_content_type('application/json', 'utf-8')
                ->set_output(json_encode($response)); 
            }
                    
    }
}

create_attachment.php(View File)

<div class="form-group">
<label>Title <span class="required">*</span></label>
<input type="text" name="Title" id="Title" class="form-control" value="<?php echo $values->Title;?>">
</div>

<label class="form-label">Upload File  <span class="required">*</span></label><br>                   
<input type="file" id="file" name="userfile" size="20" />


<script>
$(document).ready(function(){
    jQuery(document).on('click','#submit',function(e) {
        var file_data = $("#file").prop('files')[0]; 
        var form_data = new FormData(); 
        var Title=$("#Title").val();
        var ext = $("#file").val().split('.').pop().toLowerCase();
        if ($.inArray(ext, ['png','jpg','jpeg']) == -1)   {
            alert("only jpg and png images allowed");
            return;
        }  
        var picsize = (file_data.size);
        if(picsize > 2097152) /* 2mb*/
        {
            alert("Image allowd less than 2 mb")
            return;
        }
        form_data.append('file', file_data);  
        form_data.append('Title',Title);  
        $.ajax({
            url: '<?php echo base_url()?>attachment/ManageAttachment', /*point to server-side PHP script */
            dataType: 'text',  
            cache: false,
            contentType: false,
            processData: false,
            data: form_data,                         
            type: 'post',
            success: function(res){
                $(".alert_success").show();
                $("#success_message").text("Attachment created successfully !");
                window.location.hash = '#success_message';
                window.location = `<?php echo base_url()?>attachment`;
                
            
            }
        });
    });
})
</script>

AttachmentModel.php(Model File)

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

class AttachmentModel extends CI_Model {

	public function __construct()
    {
		parent::__construct();
		$this->load->database();
        
	}
	public function ManageAttachment($data,$type,$id=""){
		if($type==1){
			$this->db->insert('attachmentmst',$data);
			return $this->db->insert_id();
		}
    }
}