图片格式的互相转换

图片的互相转换

第一种：base64转换成图片路径

/**
 *  update_base64_url
 * $base64          图片 base64
 * $new_file        图片存储路径
 * $new_file_name   图片存名
 * return           图片名
 */
private function update_base64_url($base64,$new_file,$new_file_name=\'\'){
    //匹配出图片的格式
    if (preg_match(\'/^(data:\s*image\/(\w+);base64,)/\', $base64, $result)){
        $type = $result[2];
        // $new_file = "upload/weixin/";
        if(!file_exists($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(iconv("UTF-8", "GBK", $new_file), 0777,true);
        }
        //exit();
        $new_file_name = !empty($new_file_name)? $new_file_name : time().rand(111111,999999);

        $new_file_name = $new_file_name.".{$type}";
        $new_file = $new_file.$new_file_name;
            // var_dump($new_file);
      //  exit();

        if (file_put_contents($new_file, base64_decode(str_replace($result[1], \'\', $base64)),FILE_APPEND)){
            return $new_file_name;
        }
        return $new_file_name;
    }
}

调用时：

$as = [];

foreach($pic as $v){
    $imName[\'path\'] = $this->update_base64_url($v,\'upload/weixin/\');
    $imName[\'id\'] = 1;
    $as[] =$imName;
}

第二种：图片路径转换成base64

/**
 * @param $image_file
 * @return string
 * 把图片样式转换成base64格式
 */

public function base64EncodeImage ($image_file) {
    $base64_image = \'\';
    $image_info = getimagesize(\'upload/weixin/\'.$image_file);
    $image_data = fread(fopen(\'upload/weixin/\'.$image_file, \'r\'), filesize(\'upload/weixin/\'.$image_file));
    $base64_image = \'data:\' . $image_info[\'mime\'] . \';base64,\' . chunk_split(base64_encode($image_data));
    return $base64_image;
}

调用时：

foreach($arrInfo[\'pic\'] as $arrKey=>$arrValue){
    $img = $arrInfo[\'pic\'][$arrKey][\'path\'];
    $base64_img = $this->base64EncodeImage($img);
    $arrInfo[\'pictures\'][] = $base64_img;
}