php_fileupload

 https://www.geeksforgeeks.org/php-explode-function/

https://www.geeksforgeeks.org/php-explode-function/

https://code.tutsplus.com/tutorials/how-to-upload-a-file-in-php-with-example--cms-31763

<form action="actionpage.php" method="post" enctype="multipart/form-data">

        <label for="myfile">select file</label>

        <input type="file" name="myfile" id="myfile" multiple>

       <button name="upload" value="upload" >upload</button>

       

    </form>

<?php

$D=$_FILES['myfile'];

//print_r($D);

$file_name=$_FILES['myfile']['name'];

$file_type=$_FILES['myfile']['type'];

$file_size=$_FILES['myfile']['size'];

$file_tmpname=$_FILES['myfile']['tmp_name'];

//echo $file_tmpname;

$fileNameCmps = explode(".", $file_name);

//print_r($fileNameCmps) ;

    $fileExtension = strtolower(end($fileNameCmps));

    //$newFileName=$file_name.'.'.$fileExtension;

    $allowedfileExtensions = array('jpg', 'gif', 'png', 'zip', 'txt', 'xls', 'doc');

    if(in_array($fileExtension,$allowedfileExtensions)){

        $uploadFileDir = 'uploaded_files/';

      $dest_path = $uploadFileDir . $file_name;

      echo $dest_path;

      if(move_uploaded_file($file_tmpname, $dest_path)) 

      {

        $message ='File is successfully uploaded.';

      }

      else

      {

        $message = 'There was some error moving the file to upload directory. Please make sure the upload directory is writable by web server.';

      }

    }

    else

    {

      $message = 'Upload failed. Allowed file types: ' . implode(',', $allowedfileExtensions);

    }

?>