通过base64 上传文件

$url = "http://127.0.0.1/user/update_user_profile.php";
    $post_data = [
        'user_id'=>'100010',
        'sign'=>'1d4d8920ce87b5ef44a67870556dd35a',
        'category_type'=>'1',
        'title'=>'title1',
        'source'=>'source111',
        'content'=>'content1111',
        'image_list'=>'data:image/png;base64,iVBOElFTkSuQmCC|w*h',
    ];
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    // post数据
    curl_setopt($ch, CURLOPT_POST, 1);
    // post的变量
    curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
    $output = curl_exec($ch);
    curl_close($ch);
    //打印获得的数据
    print_r($output);

foreach($param_image_list as $param_image_item) {
        $param_image_data = $param_image_item['image_data'];
        $param_image_width = $param_image_item['w'];
        $param_image_height = $param_image_item['h'];
        $s = base64_decode(str_replace('data:image/png;base64,', '', $param_image_data));
        $image_path = '../uploadimg/'.md5($param_user_id).'_'.time().'_'.$index.'.png';
        file_put_contents($image_path, $s);
        $index ++;
        array_push($image_info_list,$image_path.'|'.$param_image_width.'|'.$param_image_height);
    }