Upload file to server hosting by PHP. Encode file to Base 64 extension

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,
#1

Hello friends,

there are several ways to upload a file to our server: FTP, Postfile,… in this example we are going to convert the file into text using a Base 64 extension and upload that text using PHP.

You can download the extension com.KIO4_Base64.aix of:
http://kio4.com/appinventor/277_extension_imagen_string.htm

In this example I will use 000webhost server
phpsubirK1

<?php
// Juan A. Villalpando
// kio4.com
// https://kio4.000webhostapp.com/dibujo.jpg

$datos=$_POST;
$contenido=$datos['contenido'];

$plainText = base64_decode(str_replace(array('-', '_',' ','\n'), array('+', '/','+',' '), $contenido));
$ifp = fopen( "dibujo.jpg", "wb" );
fwrite( $ifp,  $plainText );
fclose( $ifp );

echo "Creo que ha subido";
?>

p327C_subir_archivo_textoK.aia (324.4 KB)

“https://kio4.000webhostapp.com/dibujo.jpg ”

4 Likes
#2

Now with different name of image:
phpsubirK2

p327C_subir_archivo_textoK_2.aia (324.5 KB)

<?php
// Juan A. Villalpando
// kio4.com
// https://kio4.000webhostapp.com/name_image.jpg

$datos=$_POST;
$contenido=$datos['contenido'];
$nombre=$datos['nombre'];

$plainText = base64_decode(str_replace(array('-', '_',' ','\n'), array('+', '/','+',' '), $contenido));
$ifp = fopen( $nombre, "wb" );
fwrite( $ifp,  $plainText );
fclose( $ifp );

echo "Creo que ha subido";
?>
2 Likes
#3

Cam Take Picture and upload to server.

phpsubirK3
phpsubirK3735×710 45.8 KB

The same code PHP from the previous post

p327C_subir_archivo_textoK_Cam.aia (325.2 KB)

The photos usually have a size of 2MB … 4MB, it will take a while to upload to the server.

3 Likes
#4

The files will be in the same directory that the php file is located?

#5

In my examples, the PHP code and the file we have uploaded are in the same directory, but you can change the PHP code so that it can be saved in another directory.

2 Likes
#6

Save the file in a different directory than the PHP code:

<?php
// Juan A. Villalpando
// kio4.com
// https://kio4.000webhostapp.com/other_directory/file.abc

$datos=$_POST;
$contenido=$datos['contenido'];
$nombre=$datos['nombre'];

$plainText = base64_decode(str_replace(array('-', '_',' ','\n'), array('+', '/','+',' '), $contenido));
$ifp = fopen( "./other_directory/".$nombre, "wb" );
fwrite( $ifp,  $plainText );
fclose( $ifp );

echo "Creo que ha subido";
?>
1 Like
#7

Or pass the directory you want as a parameter and in the script to check if the folder exists or not; if it does not exist, it is created;

#8

Hello,
Since the new version of Android, the file to string does not work anymore wheras it worked very well before.
Can you help me ?
Vincent

#9

@vinc U mean in android 11, Base64 does not work for files?

#10

Yes I mean with Android 11
But Juananton1991 allready replied me through an other way, he is going to change its code.
Thank you Juan.
Vincent

#11

Try version KIO4_Base64v10.aix

Edited:

I have modified the code, you can check if the new extension works:

  • If you are going to use this extension in Android 10 or higher , you must use the blocks that contain " ASD" , the BASE directory is:

/storage/emulated/0/Android/data/‘namepackage’/files

that is, if in the CreateDirectoryASD block you write: /my_directory , it will be created in:
/storage/emulated/0/Android/data/‘namepackage’/files/my_directory

  • If you are going to use this extension in Android 9 or lower , you can use the blocks that contain “ASD” as I have indicated above, you can also use the blocks that do not contain “ASD”, in this case the BASE directory is:

/mnt/sdcard

that is, if in the CreateDirectory block you write: /my_directory , it will be created in:
/mnt/sdcard/my_directory

  • This extension also contains the GetApi and GetSdkCodeName blocks, with these blocks you can check the version of Android that the device has installed.

http://kio4.com/appinventor/277_extension_imagen_string.htm

2 Likes