In PHP, how to encode the generated verification code image into base64?

Question

PHP Server Android Client

I need to encode the verification code image generated by the server into base64

Note: does not generate and display images, but directly encodes the generated image resources into base64

so how to do? ? ? ? ? ? ?

Answer 1

Main functions:

function base64EncodeImage ($image_file) {
    $base64_image = '';
    $image_info = getimagesize($image_file);
    $image_data = fread(fopen($image_file, 'r'), filesize($image_file));
    $base64_image = 'data:' . $image_info['mime'] . ';base64,' . chunk_split(base64_encode($image_data));
    return $base64_image;
}

demo:

<?php
$img = 'icon.jpg';
$base64_img = base64EncodeImage($img);
 
echo '<img src="' . $base64_img . '" />';
echo '<img src="' . $img . '" />';
 
function base64EncodeImage ($image_file) {
    $base64_image = '';
    $image_info = getimagesize($image_file);
    $image_data = fread(fopen($image_file, 'r'), filesize($image_file));
    $base64_image = 'data:' . $image_info['mime'] . ';base64,' . chunk_split(base64_encode($image_data));
    return $base64_image;
}
?>

Implementation:

================ Supplements =================

GD to base64:

ob_start (); 
imagejpeg ($img);
$image_data = ob_get_contents (); 
ob_end_clean (); 

It is estimated that ob_get_contents is used to obtain buffer data.
Refer to the original text: Original text link

PS:
Please make good use of Google Baidu.

Answer 2

If the generated verification code is saved on the server side, use file_get_contents to get the image and then base64encode the result and output it.