<?php

	if(isset($_FILES['image'])) {
		$errors = array();
		$allowed_ext = array('jpg', 'jpeg', 'png', 'gif', 'psd');

		$file_name = $_FILES['image']['name'];
		$file_ext = strtolower(end(explode('.', $file_name)));
		$file_size = $_FILES['image']['size'];
		$file_tmp = $_FILES['image']['tmp_name'];

		if(in_array($file_ext, $allowed_ext) === false) {
			$errors[] = 'Extension denied';
		}

		if($file_size > 2097152) {
			$errors[] = 'File must be under 2mb';
		}

		if(empty($errors)) {
				//finally upload
			if(move_uploaded_file($file_tmp, 'images/'.$file_name)) {
				echo 'File uploaded successfully';
			}
				} else {
					foreach ($errors as $error) {
						echo $error, '<br />';
					}

				}
	}
?>

<form action="" method="POST" enctype="mutlipart/form-data">
	<p>
		<input type="file" name="image" />
		<input type="submit" value="Submit" />
	</p>
</form>