How to Uploading file to web server in Php

Often web sites offer users the functionality of uploading their files such

as photographs and textual captions.

 PHP has several built in functions that assist in managing file uploads to a web server.

 To upload the file in web server a user interface must be created which contain file control.

 The file control of Form tag is useful to select the file from local hard disk at the client; a clickable Upload File button on the form completes its functionality.

 <input type="file" name="file1">

There is one global PHP variable called $_FILES. This variable is an associate double dimension array and keeps all the information related to uploaded file.

So if the value assigned to the input's name attribute in uploading form was file,

  then PHP would create following five variables:

   $_FILES['file']['tmp_name']- the uploaded file in the temporary directory on the web server.

$_FILES['file']['name'] - the actual name of the uploaded file.

$_FILES['file']['size'] - the size in bytes of the uploaded file.

$_FILES['file']['type'] - the MIME type of the uploaded file.

$_FILES['file']['error'] - the error code associated with this file upload.

Ø The process of uploading a file follows these steps

    The user opens the page containing a HTML form featuring a text files, a browse button and a submit button.

    The user clicks the browse button and selects a file to upload from the local

PC.

    The full path to the selected file appears in the text filed then the user clicks

the submit button.

    The selected file is sent to the temporary directory on the server.

    The PHP script that was specified as the form handler in the form's action attribute checks that the file has arrived and then copies the file into an intended directory.

    The PHP script confirms the success to the user.

  An uploaded file could be a or text file file image or any document.

  move_uploaded_file() Function

The move_uploaded_file() function moves an uploaded file to a new location.

  This function returns TRUE on success, or FALSE on failure.

Syntax

move_uploaded_file(file,newloc)

Parameter	Description
File	Required. Specifies the file to be moved
Newloc	Required. Specifies the new location for the file