hello everyone..

please i want to know how i can convert my *.jpg image into bytes ??

i am searching online and i did not get any module or example that can solve this problem.

They are already "bytes", that's how they can be stored digitally.

do you mean:

you want to encode into character data to embed in an email. (base64)
or
You want to stream it as binary data to a user-agent?
or
something else?

Originally Posted by chrishirst

They are already "bytes", that's how they can be stored digitally.

do you mean:

you want to encode into character data to embed in an email. (base64)
or
You want to stream it as binary data to a user-agent?
or
something else?

in the following example there is a text that is converted to image all that i need is to make the opposite.


i have an image and i want to get the string like the variable $data

PHP Code:

<?php
$data = 'iVBORw0KGgoAAAANSUhEUgAAABwAAAASCAMAAAB/2U7WAAAABl'
       . 'BMVEUAAAD///+l2Z/dAAAASUlEQVR4XqWQUQoAIAxC2/0vXZDr'
       . 'EX4IJTRkb7lobNUStXsB0jIXIAMSsQnWlsV+wULF4Avk9fLq2r'
       . '8a5HSE35Q3eO2XP1A1wQkZSgETvDtKdQAAAABJRU5ErkJggg==';
$data = base64_decode($data);

$im = imagecreatefromstring($data);
if ($im !== false) {
    header('Content-Type: image/png');
    imagepng($im);
    imagedestroy($im);
}
else {
    echo 'An error occurred.';
}
?>

http://php.net/manual/en/function.base64-encode.php

Originally Posted by chrishirst

http://php.net/manual/en/function.base64-encode.php

thanks alot for your help

the function is encoding my code well.. but
when i tried to show the encoded image it shows for me a string not the image itself.

can you help me to show it.. coz i am selecting it from databse as encoded string??

PHP Code:

$data = file_get_contents('1A_Logo.JPG');
$data = base64_encode($data); 
//echo $data;

$test= base64_decode($data);
echo $test; 


Try this:
$image = file_get_contents('1A_Logo.JPG');
$data = base64_encode($image);
//echo $data;

$test= base64_decode($data);
echo $test;

To display the encoded data as an image you have to send the content header that corresponds to the appropriate file type along with the data, so the useragent knows how to display it.

Originally Posted by chrishirst

To display the encoded data as an image you have to send the content header that corresponds to the appropriate file type along with the data, so the useragent knows how to display it.

how i can know this header?

http://www.iana.org/assignments/media-types/index.html

http://www.w3schools.com/media/media_mimeref.asp

http://reference.sitepoint.com/html/mime-types-full