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imagecreatefromstring函数有什么问题？

phpimagephp-5.3php-gd
4

这段代码有什么问题？

<?php
$data = "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...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";    
$data = base64_decode($data);

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

我遇到了以下错误：

  • 警告：imagecreatefromstring（）：gd-png：致命的libpng错误：D：\ wamp \ www \ img \ index.php第5行读取错误：截断数据

  • 警告：imagecreatefromstring（）：gd-png错误：setjmp返回错误条件在D：\ wamp \ www \ img \ index.php第5行

  • 警告：imagecreatefromstring（）：传递的数据不是“PNG”格式在D：\ wamp \ www \ img \ index.php第5行

  • 警告：imagecreatefromstring（）：无法从数据中创建GD图像流在D：\ wamp \ www \ img \ index.php第5行

发生了一个错误。

请问有人可以帮我吗？

谢谢。

1
我最好的猜测是你提供的base64不完整。 - webmaster777
3个回答
7

base64 数据 无效，不完整或包含无效的字符... 这里是一个快速验证

var_dump($data === base64_encode(base64_decode($data)));

返回
bool(false)
7

在你的base64编码图片中间有一个...。

AAAECBAg...gQIECAAA

0
$image = imagecreatefromstring(file_get_contents('your_image_path_here'));

例如：$image = imagecreatefromstring(file_get_contents('sample.jpg'));
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