PHP

File Upload

You want to upload a file.

Use the <input type='file'> of a form. You also need to include the attribute enctype="multipart/form-data" of the form to let the browser know to expect different types of form data. To limit the size of the file being uploaded, also use the hidden type.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="EN" lang="EN">
<head>
<title>File Upload</title>
<meta Name="Author" Content="Hann So">
</head>
<body>
<p>
<?php

if (isset($_POST['submit'])) {
		process_form();
	}
	else {
		display_form();// display form for the first time
	}

function display_form() {
	echo <<<HTML
	<h2>Feedback Form</h2>
	<form action = "$_SERVER[SCRIPT_NAME]" method="post" enctype="multipart/form-data">
	Filename:
	<input type="file" name="file" size="40" />
	<input type="hidden" name="max_size" value="30000" />
	<br />
	<input type="submit" name="submit" value="Upload the file" />
	</form>
HTML;
}

function process_form() {

	$file = "$_POST[file]";

	// move the uploaded file
	if (move_uploaded_file($_FILES[file][tmp_name], "data/{$_FILES[file][name]}")) {
		echo "<p>Your file has been uploaded.</p>";
	}
	else {
		// print a message based upon the error
		switch ($_FILES[file][error]) {
			case 1:
				echo "The file exceed the upload_max_filesize setting in php.ini";
				break;
			case 2:
				echo "The file exceeds the max_size setting in the form.";
				break;
			case 3:
				echo "The file was only partially uploaded.";
				break;
			case 4:
				echo "No file was uploaded.";
				break;
		}
	}

	echo "<p><a href=\"$_SERVER[SCRIPT_NAME]\">Try again?</a></p>\n";
	echo "<p><a href=\"example_r.php\">
	Do you want to read from the file?</a></p>\n";
}
?>
</p>
</body>
</html>

View the effect