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W e b t u t o r i a l s

Define PHP

PHP Installation

PHP INI File

PHP Case Sensitivity

PHP Variable

PHP Echo & Print

PHP Operators

PHP Receiving Input

PHP Decision Making

PHP Loops

PHP Jumping Statement

PHP Image Gallery

PHP Arrays

PHP File Upload

PHP String Functions

PHP Math Functions

PHP Functions

PHP Variable Scope

PHP Constant Variable

PHP Superglobals

PHP Form Validation

PHP Include Statement

PHP Filter

PHP File Handling

PHP Date Functions

PHP Cookies

PHP Session

PHP Send Emails

PHP Captcha

PHP-MySQL Connectivity

PHP MySQL Select

PHP MySQL Insert

PHP MySQL Delete

PHP MySQL Update

PHP MySQL Injection

PHP File Upload

With PHP, you can upload files to the server, File format can be of any kind like images, videos, ZIP files, Microsoft Office documents, PDFs, as well as executables files. To upload a file first configure the "php.ini" file, In "php.ini" file, search for the file_uploads directive, and set it to On.

Some rules to follow for the HTML form:
Make sure that the form uses method="post"
The form also needs the following attribute: enctype="multipart/form-data". This attribute ensures that the form data is encoded as mulitpart MIME data — which is required for uploading the large quantities of binary data such as files.

Access Uploaded file details

Once the form is submitted information about the uploaded file can be accessed via PHP superglobal array called $_FILES. For example, our upload form contains a file select field called photo (i.e. name="photo"), if any user uploaded a file using this field, we can obtains its details like the name, type, size, temporary name or any error occurred while attempting the upload via the $_FILES["photo"] associative array, like this:

$_FILES["photo"]["name"] — This array value specifies the original name of the file, including the file extension. It doesn't include the file path.
$_FILES["photo"]["type"] — This array value specifies the MIME type of the file.
$_FILES["photo"]["size"] — This array value specifies the file size, in bytes.
$_FILES["photo"]["tmp_name"] — This array value specifies the temporary name including full path that is assigned to the file once it has been uploaded to the server.
$_FILES["photo"]["error"] — This array value specifies error or status code associated with the file upload.
<?php
if($_FILES["photo"]["error"] > 0){
    echo "Error: " . $_FILES["photo"]["error"] . "<br>";
} else{
    echo "File Name: " . $_FILES["photo"]["name"] . "<br>";
    echo "File Type: " . $_FILES["photo"]["type"] . "<br>";
    echo "File Size: " . ($_FILES["photo"]["size"] / 1024) . " KB<br>";
    echo "Stored in: " . $_FILES["photo"]["tmp_name"];
}
?>
Example 1: Create The HTML Form. upload.php file

Check if File Already Exists

Check if the file already exists in the "uploads" folder. If it does, an error message is displayed, and if it does not exists than save the file in upload folder.

// Check if file already exists
if (file_exists($target_file)) {
    echo "Sorry, file already exists.";
}

Limit File Size

Check the size of the file. If the file is larger than 500kb, an error message is displayed.

if ($_FILES["file1"]["size"] > 500000) {
    echo "Sorry, your file is more than 500kb.";
}

Limit File Type

Allow only JPG, JPEG, PNG & GIF files.

echo $_FILES['file1']['type'];
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
if($imageFileType != "jpg" && $imageFileType != "jpeg" && $imageFileType != "png" && $imageFileType != "gif" ) 
{
    echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
}