Upload Image using ajax (json) - php

Question

I need to upload image using ajax. Elaborating my point:
I need to pass my image data to a PHP page and check the type, size, name and all other attributes of the file. If all attributes matches, then only I need to transfer the file. Problem here is passing of data should be done in JSON(AJAX) format only. One more important thing is that I don't have to convert it to base64.
If you can help me in this, You are most welcome.
Thanks in advance.

Answer 1

The idea in SO is to work on the OP current code. I mean, we are not here to make all the job, because it should have a price. Anyway, here is a workaround for your issue:
Convert your image to base64 using javascript. This useful method works like a charm:
// Code taken from MatthewCrumley (http://stackoverflow.com/a/934925/298479)
function getBase64Image(img) {
// Create an empty canvas element
var canvas = document.createElement("canvas");
canvas.width = img.width;
canvas.height = img.height;
// Copy the image contents to the canvas
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0);
// Get the data-URL formatted image
// Firefox supports PNG and JPEG. You could check img.src to guess the
// original format, but be aware the using "image/jpg" will re-encode the image.
var dataURL = canvas.toDataURL("image/png");
return dataURL.replace(/^data:image\/(png|jpg);base64,/, "");
}
Then just pass the returned string as base64 through ajax:
$.ajax({
url: 'path/to/your/script.php',
type: 'post',
data: { paramName: imagedata } // the returned data from above js method,
/*...*/
});
And, in PHP side, just return the string to an image file:
// Code taken from Austin Brunkhorst (http://stackoverflow.com/a/15153931/3648578)
function base64_to_jpeg($base64_string, $output_file) {
$ifp = fopen($output_file, "wb");
$data = explode(',', $base64_string);
fwrite($ifp, base64_decode($data[1]));
fclose($ifp);
return $output_file;
}