How to convert base64 in to image in php? [duplicate] - php

Question

This question already has answers here:
How to save a PNG image server-side, from a base64 data URI
(17 answers)
Closed 3 years ago.
I am trying to convert my base64 image string to an image file. This is my Base64 string:
http://pastebin.com/ENkTrGNG
Using following code to convert it into an image file:
function base64_to_jpeg( $base64_string, $output_file ) {
$ifp = fopen( $output_file, "wb" );
fwrite( $ifp, base64_decode( $base64_string) );
fclose( $ifp );
return( $output_file );
}
$image = base64_to_jpeg( $my_base64_string, 'tmp.jpg' );
But I am getting an error of invalid image, whats wrong here?

Answer 1

The problem is that data:image/png;base64, is included in the encoded contents. This will result in invalid image data when the base64 function decodes it. Remove that data in the function before decoding the string, like so.
function base64_to_jpeg($base64_string, $output_file) {
// open the output file for writing
$ifp = fopen( $output_file, 'wb' );
// split the string on commas
// $data[ 0 ] == "data:image/png;base64"
// $data[ 1 ] == <actual base64 string>
$data = explode( ',', $base64_string );
// we could add validation here with ensuring count( $data ) > 1
fwrite( $ifp, base64_decode( $data[ 1 ] ) );
// clean up the file resource
fclose( $ifp );
return $output_file;
}

Answer 2

An easy way I'm using:
file_put_contents($output_file, file_get_contents($base64_string));
This works well because file_get_contents can read data from a URI, including a data:// URI.

Answer 3

You need to remove the part that says data:image/png;base64, at the beginning of the image data. The actual base64 data comes after that.
Just strip everything up to and including base64, (before calling base64_decode() on the data) and you'll be fine.

Answer 4

maybe like this
function save_base64_image($base64_image_string, $output_file_without_extension, $path_with_end_slash="" ) {
//usage: if( substr( $img_src, 0, 5 ) === "data:" ) { $filename=save_base64_image($base64_image_string, $output_file_without_extentnion, getcwd() . "/application/assets/pins/$user_id/"); }
//
//data is like: data:image/png;base64,asdfasdfasdf
$splited = explode(',', substr( $base64_image_string , 5 ) , 2);
$mime=$splited[0];
$data=$splited[1];
$mime_split_without_base64=explode(';', $mime,2);
$mime_split=explode('/', $mime_split_without_base64[0],2);
if(count($mime_split)==2)
{
$extension=$mime_split[1];
if($extension=='jpeg')$extension='jpg';
//if($extension=='javascript')$extension='js';
//if($extension=='text')$extension='txt';
$output_file_with_extension=$output_file_without_extension.'.'.$extension;
}
file_put_contents( $path_with_end_slash . $output_file_with_extension, base64_decode($data) );
return $output_file_with_extension;
}

Answer 5

That's an old thread, but in case you want to upload the image having same extension-
$image = $request->image;
$imageInfo = explode(";base64,", $image);
$imgExt = str_replace('data:image/', '', $imageInfo[0]);
$image = str_replace(' ', '+', $imageInfo[1]);
$imageName = "post-".time().".".$imgExt;
Storage::disk('public_feeds')->put($imageName, base64_decode($image));
You can create 'public_feeds' in laravel's filesystem.php-
'public_feeds' => [
'driver' => 'local',
'root' => public_path() . '/uploads/feeds',
],

Answer 6

if($_SERVER['REQUEST_METHOD']=='POST'){
$image_no="5";//or Anything You Need
$image = $_POST['image'];
$path = "uploads/".$image_no.".png";
$status = file_put_contents($path,base64_decode($image));
if($status){
echo "Successfully Uploaded";
}else{
echo "Upload failed";
}
}

Answer 7

This code worked for me.
<?php
$decoded = base64_decode($base64);
$file = 'invoice.pdf';
file_put_contents($file, $decoded);
if (file_exists($file)) {
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="'.basename($file).'"');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
readfile($file);
exit;
}
?>

Answer 8

$datetime = date("Y-m-d h:i:s");
$timestamp = strtotime($datetime);
$image = $_POST['image'];
$imgdata = base64_decode($image);
$f = finfo_open();
$mime_type = finfo_buffer($f, $imgdata, FILEINFO_MIME_TYPE);
$temp=explode('/',$mime_type);
$path = "uploads/$timestamp.$temp[1]";
file_put_contents($path,base64_decode($image));
echo "Successfully Uploaded->>> $timestamp.$temp[1]";
This will be enough for image processing. Special thanks to Mr. Dev Karan Sharma