Hướng dẫn file upload php github

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	$target_dir = "uploads/";
	$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
	$uploadOk = 1;
	$imageFileType = strtolower(pathinfo($target_file,PATHINFO_EXTENSION));

	// Check if image file is a actual image or fake image
	if(isset($_POST["submit"])) {
	$check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
	if($check !== false) {
	echo "File is an image - " . $check["mime"] . ".";
	$uploadOk = 1;
	} else {
	echo "File is not an image.";
	$uploadOk = 0;
	}
	}

	// Check if file already exists
	if (file_exists($target_file)) {
	echo "Sorry, file already exists.";
	$uploadOk = 0;
	}

	// Check file size
	if ($_FILES["fileToUpload"]["size"] > 500000) {
	echo "Sorry, your file is too large.";
	$uploadOk = 0;
	}

	// Allow certain file formats
	if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
	&& $imageFileType != "gif" ) {
	echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
	$uploadOk = 0;
	}

	// Check if $uploadOk is set to 0 by an error
	if ($uploadOk == 0) {
	echo "Sorry, your file was not uploaded.";
	// if everything is ok, try to upload file
	} else {
	if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
	echo " The file ". htmlspecialchars( basename( $_FILES["fileToUpload"]["name"])). " has been uploaded. ";
	echo " ";
	} else {
	echo "Sorry, there was an error uploading your file.";
	}
	}
	?>

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