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使用PHP中的AJAX请求保存base64编码的图像

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我将画布图像编码为base64，这给了我：

data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAICAgICAQICAgICAgIDAwYEAwMDAwcFBQQGCAcICAgHCAgJCg0LCQkMCggICw8LDA0ODg4OCQsQEQ8OEQ0ODg7/2wBDAQICAgMDAwYEBAYOCQgJDg4ODg4ODg4ODg4ODg4ODg4ODg4ODg4ODg4ODg4ODg4ODg4ODg4ODg4ODg4ODg4ODg7/wAARCAAKAAoDASIAAhEBAxEB/8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgcICQoL/8QAtRAAAgEDAwIEAwUFBAQAAAF9AQIDAAQRBRIhMUEGE1FhByJxFDKBkaEII0KxwRVS0fAkM2JyggkKFhcYGRolJicoKSo0NTY3ODk6Q0RFRkdISUpTVFVWV1hZWmNkZWZnaGlqc3R1dnd4eXqDhIWGh4iJipKTlJWWl5iZmqKjpKWmp6ipqrKztLW2t7i5usLDxMXGx8jJytLT1NXW19jZ2uHi4+Tl5ufo6erx8vP09fb3+Pn6/8QAHwEAAwEBAQEBAQEBAQAAAAAAAAECAwQFBgcICQoL/8QAtREAAgECBAQDBAcFBAQAAQJ3AAECAxEEBSExBhJBUQdhcRMiMoEIFEKRobHBCSMzUvAVYnLRChYkNOEl8RcYGRomJygpKjU2Nzg5OkNERUZHSElKU1RVVldYWVpjZGVmZ2hpanN0dXZ3eHl6goOEhYaHiImKkpOUlZaXmJmaoqOkpaanqKmqsrO0tba3uLm6wsPExcbHyMnK0tPU1dbX2Nna4uPk5ebn6Onq8vP09fb3+Pn6/9oADAMBAAIRAxEAPwD5a/Z7/Zw8EfF/9mT4h6Z4u0GTwt8WNP1iSya7vZp0uNKYJBsItyANjt5o2uGkDBsHhMfDsOn2zWcTQ39tJCUBR5HVGYY4JUEgH2BIHrXunw71vWdI/aa+POraTq+p6Xqr+H/Edy15aXTxTNMt4m2QupDbxubDZyMn1r4yRE8pflXoO1fleQYDEzzHGxnXbjeEop6qPNFtpXb00Wm3zP1vNM2pUMLh5RpK75k3fV8rVm7LzP/Z

这似乎是一个有效的base64图像（用在线解码器解码） .

我用其他（form-）变量和jquery ajax一起发送它，如下所示：

$.ajax({
    type: "POST",
    url: "index.php?action=saveNewPost",
    data: {text: text, img: encodeURIComponent(base64img)},
    contentType: "application/x-www-form-urlencoded;charset=UTF-8",
    success: function(){
        //...
    }
});

在服务器上，这是这一行：

saveImage(utf8_decode($_POST['img']));

哪个叫：

function saveImage($base64img){
    define('UPLOAD_DIR', '../uploads/');
    $base64img = str_replace('data:image/jpeg;base64,', '', $base64img);
    $data = base64_decode($base64img);
    $file = UPLOAD_DIR . uniqid() . '.jpg';
    file_put_contents($file, $data);
}

但是，文件未保存 . 可能有什么不对？

php jquery base64

3 回答

  • 8

    让我们尝试在单个函数和调用的相同文件夹中创建文件test.php，检查浏览器中的输出错误或 /var/log/httpd/error_log

    <?php

function saveImage($base64img){
    define('UPLOAD_DIR', '../uploads/');
    $base64img = str_replace('data:image/jpeg;base64,', '', $base64img);
    $data = base64_decode($base64img);
    $file = UPLOAD_DIR . '123123123.jpg';
    file_put_contents($file, $data);
}

saveImage('data:image/jpeg;base64,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');

    这意味着部分AJAX => php脚本的麻烦 . 现在，我们尝试比较我们从ajax和原始字符串中收到的内容，只需将您的函数更改为this并查看test.txt：

    function saveImage($base64img){
    define('UPLOAD_DIR', '../uploads/');

    $file = UPLOAD_DIR . 'test.txt';
    file_put_contents($file, 'ORIG:'.'data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAICAgICAQICAgICAgIDAwYEAwMDAwcFBQQGCAcICAgHCAgJCg0LCQkMCggICw8LDA0ODg4OCQsQEQ8OEQ0ODg7/2wBDAQICAgMDAwYEBAYOCQgJDg4ODg4ODg4ODg4ODg4ODg4ODg4ODg4ODg4ODg4ODg4ODg4ODg4ODg4ODg4ODg4ODg7/wAARCAAKAAoDASIAAhEBAxEB/8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgcICQoL/8QAtRAAAgEDAwIEAwUFBAQAAAF9AQIDAAQRBRIhMUEGE1FhByJxFDKBkaEII0KxwRVS0fAkM2JyggkKFhcYGRolJicoKSo0NTY3ODk6Q0RFRkdISUpTVFVWV1hZWmNkZWZnaGlqc3R1dnd4eXqDhIWGh4iJipKTlJWWl5iZmqKjpKWmp6ipqrKztLW2t7i5usLDxMXGx8jJytLT1NXW19jZ2uHi4+Tl5ufo6erx8vP09fb3+Pn6/8QAHwEAAwEBAQEBAQEBAQAAAAAAAAECAwQFBgcICQoL/8QAtREAAgECBAQDBAcFBAQAAQJ3AAECAxEEBSExBhJBUQdhcRMiMoEIFEKRobHBCSMzUvAVYnLRChYkNOEl8RcYGRomJygpKjU2Nzg5OkNERUZHSElKU1RVVldYWVpjZGVmZ2hpanN0dXZ3eHl6goOEhYaHiImKkpOUlZaXmJmaoqOkpaanqKmqsrO0tba3uLm6wsPExcbHyMnK0tPU1dbX2Nna4uPk5ebn6Onq8vP09fb3+Pn6/9oADAMBAAIRAxEAPwD5a/Z7/Zw8EfF/9mT4h6Z4u0GTwt8WNP1iSya7vZp0uNKYJBsItyANjt5o2uGkDBsHhMfDsOn2zWcTQ39tJCUBR5HVGYY4JUEgH2BIHrXunw71vWdI/aa+POraTq+p6Xqr+H/Edy15aXTxTNMt4m2QupDbxubDZyMn1r4yRE8pflXoO1fleQYDEzzHGxnXbjeEop6qPNFtpXb00Wm3zP1vNM2pUMLh5RpK75k3fV8rVm7LzP/Z'."\n".'AJAX:'.$base64img);
}
    回复于
  • 1

    它工作 - 似乎当一个文件包含在PHP使用

    include('file.php');

    相对路径来自父级而不是来自包含的文件:(

    这就是整个问题......感谢大家

    回复于
  • 1

    你写 encodeURIComponent （JS）然后 utf8_decode （PHP） . 只需使用 urldecode （PHP），它就可以正常工作！ :)

    回复于

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