php-base64 图片互转

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//        $base64_image_content = 'data:image/png;base64,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';

if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $base64_image_content, $url)){
            $imgtype = $url[2];
            list($s1, $s2) = explode(' ', microtime());
            $date = (float)sprintf('%.0f', (floatval($s1) + floatval($s2)) * 1000);
            // 移动到框架应用根目录/public/upload 目录下
//            $new_file = "upload/active/img/".date('Ymd',time())."/";
//            if(!file_exists($new_file))
//            {
//                //检查是否有该文件夹，如果没有就创建，并给予最高权限
//                mkdir($new_file, 0700);
//            }
            $new_file = $new_file.time().".{$imgtype}";
            $new_file = 'public/upload/'.$date.".{$imgtype}";
            if (file_put_contents($new_file, base64_decode(str_replace($url[1], '', $base64_image_content)))){
                echo '新文件保存成功：', $new_file;
            }else{
                echo '新文件保存失败';
            }











1.解析base64数据成图片

$url = explode(',' $base64);

$a = file_put_contents('./test.png', base64_decode($url[1]));//返回的是字节数

print_r($a);

2.图片转成base64数据

$str = file_get_contents('./test.png');

echo base64_encode($str);

function imgToBase64($img_url) {
    $imageInfo = getimagesize($img_url);
    $bae64 = chunk_split(base64_encode(file_get_contents($img_url)));
    $encode = 'data:'.$imageInfo['mime'] .';base64,' . $bae64;
    return $encode;
}

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