在PHP中使用AJAX请求保存base64编码的图像

我将画布图像编码到base64，这给了我以下信息：

data:image/jpeg;base64,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

这似乎是一个有效的base64图像（使用在线解码器解码）

我使用jquery ajax将其与其他（表单）变量一起发送，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，这将转到以下行：

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

这要求：

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);
}

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但是，不会保存该文件。可能有什么问题？

让我们尝试使用单个函数和调用在同一文件夹中创建test.php文件，在浏览器中检查输出错误或

/var/log/httpd/error\u 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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');

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它的工作-似乎当一个文件包含在php使用

include('file.php');

相对路径来自父级，而不是包含的文件：(

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这就是问题的症结所在…多亏了所有的

你编写了

encodeURIComponent

（JS）然后

utf8\u decode

（PHP）。只需使用

urldecode

（PHP）就可以了！：）

你有权限在那个文件夹中写文件吗？@Barif我在DIR上做了一个chmod 777，仍然没有Luckar你确定你的图像正确地到达了你的php。@MohammadAdil我在我的日志中写了“@base64img”（见上面的代码）并在线解码，效果很好。。。

include('file.php');