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? ??? ?? PHP ???? PHP ??? Base64 PNG ???? ????? ???? ??? ??????

PHP ??? Base64 PNG ???? ????? ???? ??? ??????

Dec 13, 2024 pm 03:46 PM

How to Efficiently Save Base64 PNG Images on a PHP Server?

??? ???? Base64 PNG ??? ??

? ??????? ????? "Canvas2Image"? ?? JavaScript ??? ???? ??? ??? PNG? ?????. base64? ???? ???. ?? ??? ??? base64 ???? ??? ???? ????. ? ????? PHP?? ? ??? ???? ??? ??? ?????.

PHP? ??? Base64 PNG ??? ??

base64 PNG ???? ????? ????? ?? ??? ??????.

  1. ??: ????? base64 ???? ?????. ?? ??, ?? ????? ???? ?? "data:image/png;base64"? ???? ????.
  2. ???: PHP? base64_decode() ??? ???? base64 ???? ?? ????? ?????. .
  3. ??: ?? ????? ???? ???? ??? ?? ??? ? ????. PHP? file_put_contents() ??? ??? PNG ???.

PHP ?? ?

??? ? ????? ???? PHP ?? ?????.

<?php

// Extract and decode the base64 data
$data = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAABE...';
list($type, $data) = explode(';', $data);
list(, $data) = explode(',', $data);
$data = base64_decode($data);

// Save the image to the server
file_put_contents('/tmp/image.png', $data);

?>

???? ??

??? ??? ?? ??? ?? ? ?? ??? ? ????.

$data = base64_decode(preg_replace('#^data:image/\w+;base64,#i', '', $data));

?? ?? ? ??? ??

??? ???? ????? ?? ?? ? ??? ?? ??? ?????. ?? ??? ????.

if (preg_match('/^data:image\/(\w+);base64,/', $data, $type)) {
    $data = substr($data, strpos($data, ',') + 1);
    $type = strtolower($type[1]); // jpg, png, gif

    if (!in_array($type, ['jpg', 'jpeg', 'gif', 'png'])) {
        throw new \Exception('invalid image type');
    }
    $data = str_replace(' ', '+', $data);
    $data = base64_decode($data);

    if ($data === false) {
        throw new \Exception('base64_decode failed');
    }
} else {
    throw new \Exception('did not match data URI with image data');
}

file_put_contents("img.{$type}", $data);

? ??? PHP ??? Base64 PNG ???? ????? ???? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!

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