File uploading in php

PHP programming language allows uploading a file on server with html form.

File uploading with PHP is very easy to move a file to a folder. File name is passed into move_uploaded_file() function which is uploaded in folder on server .

To upload a file we must create a form with enctype.

We can set file uploading parameters in php.ini file like upload_max_filesize and upload_tmp_dir for increasing file size to upload and folder to upload file temporarily.

Also read:

Upload multiple images with Jquery and PHP

Ajax image upload with jQuery and PHP

Let’s see how to upload a file in PHP.

<?php
   if(isset($_FILES['image'])){
      $errors= array();
      $filename = $_FILES['image']['name'];
      $filesize =$_FILES['image']['size'];
      $filetemp =$_FILES['image']['tmp_name'];
      $filetype=$_FILES['image']['type'];
      $fileext=strtolower(end(explode('.',$_FILES['image']['name'])));
      
      $extensions= array("jpeg","jpg","png","gif");
      
      if(in_array($fileext,$extensions)=== false){
         $errors[]="please choose a JPEG or PNG file.";
      }
      
      if($file_size > 2097152){
         $errors[]='File size must be exactly 2 MB';
  }
      
      if(empty($errors)==true){
         move_uploaded_file($filetemp,"images/".$filename);
         echo "Your file uploaded Successfully";
      }
      else{
         print_r($errors);
      }
   }
?>
<html>
   <body>
      
      <form action="" method="POST" enctype="multipart/form-data">
         <input type="file" name="image" />
         <input type="submit" value="Upload"/>
      </form>
      
   </body>
</html>

Going to discuss briefly about the important points used above:

multipart/form-data : It is used to allow a form to upload file successfully
Post method : this method inform browser that want to send form data to server with post method
Input name=”image” : image is a name of file to access in PHP script