将图像从localStorage上传到PHP

时间:2015-01-12 22:15:24

标签: javascript php file upload local-storage

首先,抱歉我的英语不好。 我有以下问题:

我有以下代码在LocalStorage上存储Dropped图像:

localStorage.setItem("dropped_images", JSON.stringify( array_dropped_images ) );

这将产生如下内容:

localStorage.getItem('dropped_images'):
[
{"id":0,"data":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAACgAAAAWgCAIAAAAdYo2IAAAAGXRFW…nu8vxl30QxDphgBbok9vXa1iT2dWMDBGQHDCyNMfCUO83/A/VzaPVq31uqAAAAAElFTkSuQmCC"},
{"id":1,"data":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAACgAAAAWgCAIAAAAdYo2IAAAAGXRFW…m4r4R9wH1l7K6H+6pa8cB9IzySnR2RydqmlhaTBqfp8hP/HzkuuKqP/f8rAAAAAElFTkSuQmCC"}
]

我只是无法理解如何将它发送到PHP并通过$ _FILES获取它。你能帮助我吗? 谢谢!

-------------------已解决--------------------------- -------------------------------------------------- ------------------------------

基于最佳答案(@sam-battat),可以解决这个问题,编辑部分功能:

function base64_to_img($base64_string, $output_file) {
    $data = explode(',', $base64_string);

    /**
     * Remove the raw text
     */
    $ext = str_replace("data:image/", '', $data[0]);
    $ext = str_replace(";base64", '', $ext);

    /**
     * Create the file with the correct extension
     */
    $ifp = fopen($output_file . "." . $ext, "wb"); 

    /**
     * Create file based on base64
     */
    fwrite($ifp, base64_decode($data[1])); 
    fclose($ifp); 

    /**
     * return file path
     */
    return $output_file; 
}

非常感谢!

1 个答案:

答案 0 :(得分:1)

您可以发布字符串(base64字符串)并稍后将其转换为文件:

$img = $_POST['img_data'];

$file = base64_to_img($img, '/path/to/file.png');

function base64_to_img($base64_string, $output_file) {
    $ifp = fopen($output_file, "wb"); 

    $data = explode(',', $base64_string);

    fwrite($ifp, base64_decode($data[1])); 
    fclose($ifp); 

    return $output_file; 
}