Php file downloading-php Tutorial

Php file upload 1. Upload a common file using the original php file. (1) front-end code & lt; formactionupload_file.phpmethodpostenctypemultipartform-data & gt; & lt; labelforfile & gt; Filename: & lt; label & g php file Upload

I. normal file Upload method

Use the original php file to upload files.

(1) front-end code

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(2) php code (upload_file.php)

    
  0) {          echo "Return Code: " . $_FILES["file"]["error"] . "
";        }else {            echo "Upload: " . $_FILES["file"]["name"] . "
";            echo "Type: " . $_FILES["file"]["type"] . "
";            echo "Size: " . ($_FILES["file"]["size"] / 1024) . " Kb
";            echo "Temp file: " . $_FILES["file"]["tmp_name"] . "
";                  if (file_exists("upload/" . $_FILES["file"]["name"])){               echo $_FILES["file"]["name"] . " already exists. ";            }else{               move_uploaded_file($_FILES["file"]["tmp_name"],               "upload/" . $_FILES["file"]["name"]);               echo "Stored in: " . "upload/" . $_FILES["file"]["name"];            }        }            }else {        echo "Invalid file";      }      ?>  

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II. asynchronous file upload mode

The purpose is to use as few plug-ins as possible. Therefore, iframe is used to upload files asynchronously.

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(1) front-end html

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Function startUpload () {var spanObj = document. getElementById ("info"); spanObj. innerHTML = "start upload"; document. getElementById ("upForm "). sumbit ();} // callback function stopUpload (responseText) {var spanObj = document. getElementById ("info"); spanObj. innerHTML = "uploaded successfully"; spanObj. innerHTML = responseText ;}

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(2) server code

$ File = $ _ FILES ['myfile']; $ fileName = uploadFile ($ file); // $ result = readFromFile (".. /upload /". $ fileName); echo"