How to implement file upload and download in php (code)-PHP Tutorial-php.cn

How to implement file upload and download in php (code)

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Release： 2023-04-03 21:08:02

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The content of this article is about the method (code) of implementing file upload and download in PHP. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

1. Pass in the parameter as the key of the array in the function

function test2($name){
    $ar = (object) array(     
    $name => 1,     
    "image_id"=>1234
    );    
    echo $ar->$name;
}
//获取host_id的value
test2(host_id);

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2. Download the file
dest_path is '/ tmp/images/raw_image.jpg'
image_src is the http path of the image

//如果文件存在,已经下载过,删除该文件
            if (file_exists($dest_path)) {
                unlink($dest_path);
            }            
            //下载对应的文件
            $f_output = fopen($dest_path, &#39;a&#39;);            
            $ch = curl_init();
            curl_setopt($ch, CURLOPT_URL, $image_src);
            curl_setopt($ch, CURLOPT_FILE, $f_output);
            curl_setopt($ch, CURLOPT_HEADER, 0);
            curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);
            curl_setopt($ch, CURLOPT_LOW_SPEED_LIMIT, 2);
            curl_setopt($ch, CURLOPT_LOW_SPEED_TIME, 60);            
            $result = curl_exec($ch);
            curl_close($ch);            
            fclose($f_output);            
            if ($result)
             {                
            break;
              }

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3. File upload
url is the upload path

$ch = curl_init();
            curl_setopt($ch, CURLOPT_URL, $url);
            curl_setopt($ch, CURLOPT_VERBOSE, true);
            curl_setopt($ch, CURLOPT_POST, true);
            curl_setopt($ch, CURLOPT_POSTFIELDS, array(&#39;file&#39; => $bs64));
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);            
            $res = curl_exec($ch);
            curl_close($ch); 
            }

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