no1k/index.php

## index.php
<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>Single Upload Form with PHP</title>
  </head>
  <body>

	<form method="POST" action="upload.php" enctype="multipart/form-data">
		<label for="file"> Pick a file :  </label>
		<input type="file" name ="file">
		<input type="submit" value = "Upload">
	</form>


  </body>
</html>

## upload.php
<?php

	//Check if the file is well uploaded
	if($_FILES['file']['error'] > 0) { echo 'Error during uploading, try again'; }

	//We won't use $_FILES['file']['type'] to check the file extension for security purpose

	//Set up valid image extensions
	$extsAllowed = array( 'jpg', 'jpeg', 'png', 'gif' );

	//Extract extention from uploaded file
		//substr return ".jpg"
		//Strrchr return "jpg"

	$extUpload = strtolower( substr( strrchr($_FILES['file']['name'], '.') ,1) ) ;

	//Check if the uploaded file extension is allowed

	if (in_array($extUpload, $extsAllowed) ) {

	//Upload the file on the server

	$name = "img/{$_FILES['file']['name']}";
	$result = move_uploaded_file($_FILES['file']['tmp_name'], $name);

	if($result){echo "<img src='$name'/>";}

	} else { echo 'File is not valid. Please try again'; }

?>
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="UTF-8">
	<title>Single Upload Form with PHP</title>
	</head>
	<body>

	<form method="POST" action="upload.php" enctype="multipart/form-data">
	<label for="file"> Pick a file : </label>
	<input type="file" name ="file">
	<input type="submit" value = "Upload">
	</form>



	</body>
	</html>
	<?php

	//Check if the file is well uploaded
	if($_FILES['file']['error'] > 0) { echo 'Error during uploading, try again'; }

	//We won't use $_FILES['file']['type'] to check the file extension for security purpose

	//Set up valid image extensions
	$extsAllowed = array( 'jpg', 'jpeg', 'png', 'gif' );

	//Extract extention from uploaded file
	//substr return ".jpg"
	//Strrchr return "jpg"

	$extUpload = strtolower( substr( strrchr($_FILES['file']['name'], '.') ,1) ) ;

	//Check if the uploaded file extension is allowed

	if (in_array($extUpload, $extsAllowed) ) {

	//Upload the file on the server

	$name = "img/{$_FILES['file']['name']}";
	$result = move_uploaded_file($_FILES['file']['tmp_name'], $name);

	if($result){echo "<img src='$name'/>";}

	} else { echo 'File is not valid. Please try again'; }

	?>