How can i upload image with ajax in codeigniter?

Question

I\'m trying to upload image with jQuery and ajax function, and how can I fetch all details of image file, like in php we use $_FILE()

Here is my code

Answer 1

In the view where you are displaying form:

add attribute: enctype=multipart/form-data

Or,

If you are creating a form with form helper:

<?php echo form_open_multipart('blog/uploadimg');?>

Answer 2

You can use Ajaxfileupload.js to upload file:

$('input[type="file"]').ajaxfileupload({
          'action': 'save_photo.php',
          'params': {
            'extra': 'info'
          },
          'onComplete': function(response) {

           console.log('custom handler for file:');
           alert(JSON.stringify(response));

          },
          'onStart': function() {               

          },
          'onCancel': function() {
            console.log('no file selected');
          }
    });

save_photo.php :

<?php

print_r($_FILES); // print details about the file which has been uploaded

?>

Answer 3

You can get seamless functionality if you use this plugin (well written) in javascript.

http://malsup.com/jquery/form/

To Upload File in PHP

<?php
$target_dir = "uploads/";
$target_file = $target_dir . basename($_FILES["file"]["name"]);
$uploadOk = 1;
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
// Check if image file is a actual image or fake image
if(isset($_POST["submit"])) {
    $check = getimagesize($_FILES["file"]["tmp_name"]);
    if($check !== false) {
        echo "File is an image - " . $check["mime"] . ".";
        $uploadOk = 1;
    } else {
        echo "File is not an image.";
        $uploadOk = 0;
    }
}
// Check if file already exists
if (file_exists($target_file)) {
    echo "Sorry, file already exists.";
    $uploadOk = 0;
}
// Check file size
if ($_FILES["file"]["size"] > 500000) {
    echo "Sorry, your file is too large.";
    $uploadOk = 0;
}
// Allow certain file formats
if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
&& $imageFileType != "gif" ) {
    echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
    $uploadOk = 0;
}
// Check if $uploadOk is set to 0 by an error
if ($uploadOk == 0) {
    echo "Sorry, your file was not uploaded.";
// if everything is ok, try to upload file
} else {
    if (move_uploaded_file($_FILES["file"]["tmp_name"], $target_file)) {
        echo "The file ". basename( $_FILES["file"]["name"]). " has been uploaded.";
    } else {
        echo "Sorry, there was an error uploading your file.";
    }
}
?>

Answer 4

You can to use FormData api in html5.

Your form must be:

<form enctype="multipart/form-data" accept-charset="utf-8" name="formname" id="formname"  method="post" action="">

Then jquery:

function uploadImage() {

    if (typeof FormData !== 'undefined') {

        // send the formData
        var formData = new FormData( $("#formID")[0] );

        $.ajax({
            url : baseUrl + 'uploadImage',  // Controller URL
            type : 'POST',
            data : formData,
            async : false,
            cache : false,
            contentType : false,
            processData : false,
            success : function(data) {
                successFunction(data);
            }
        });

    } else {
       message("Your Browser Don't support FormData API! Use IE 10 or Above!");
    }   
}

Then in the controller you will get the files in $_FILES array.