Pfthb

I want to convert image data to base64 string
I am already doing this technique

file 1
detail_project2.html 
<form method="post" name="frm_pdf_handler" id="frm_pdf_handler" action="<?php echo base_url('index.php/laporan/pdf_handler') ?>">
 <input type="hidden" name="<?php echo $this->security->get_csrf_token_name();?>" value="<?php echo $this->security->get_csrf_hash();?>">
 <input type="text" id="foo_element" name="grppenyerapankeuangan"/>
<button>Create PDF</button>
</form>
<script>
$(document).ready(function () 


var chart1_data = <?php echo $arrlinechart; ?>;
var chart1_options = ;
var chart1_element = 'chart_realisasi_keuangan';
var chart1_type = google.visualization.ColumnChart;
drawGoogleChart2(chart1_data, chart1_options, chart1_element, chart1_type);
);
</script>

file 2 devoops.js//from google charts

function drawGoogleChart2(chart_data, chart_options, element, chart_type) 
var data = google.visualization.arrayToDataTable(chart_data);
 google.visualization.events.addListener(chart, 'ready', function () 
 var image=chart.getImageURI();//convert canvas to image file from google chart
$("#foo_element").val('data:image/base64,' + image);//store base64 to input field before delivered to php controller


chart.draw(data, chart_options);
}

file 3
pdf_handler.php (codeigniter controller)

<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class Pdf_handler extends CI_Controller 
 function index()
echo "<img src='".$this->input->post("foo_element")."'"."/>";

base64 string is successfully generated but cannot apears image as my espectation. someone can help me please?

Please try to set it like this:

$('#foo_element').html('<img src="data:image/png;base64,' + image + '" />');

Update

Can you please attach the html from what this line outputs (pdf_handler.php),

echo "<img src='".$this->input->post("grppenyerapankeuangan")."'"."img/>"; 

it looks like it should be like this

echo "<img src='".$this->input->post("grppenyerapankeuangan")."' />"; 

Also in my example it specifies image type as png, not sure if image type is mandatory..

[solved]

this is actualy happen.

when I am doing this

var image=chart.getImageURI();

variabel image is not image file but base64 encoding format
so my mistake is
when I am trying to convert base64 again
like this

$("#foo_element").val('data:image/base64,' + image);//my fatal mistake

so, this is what I necesary to do

$("#foo_element").val(image);//my revision

and finaly everything work fine.
thank you All :D