PHP
(quick guide & example)
<form action="UP.PHP" enctype="multipart/form-data"> <input type="file" name="up" required accept=".jpg,.png,.gif"> <input type="submit" value="Upload"> </form>
ALLOWED FILE TYPES $allow = ["jpg", "png", "gif"]; UPLOADED FILE TYPE $ext = strtolower(pathinfo($_FILES["up"]["name"], PATHINFO_EXTENSION)); SAVE UPLOADED FILE if (in_array($ext, $allow)) { $src = $_FILES["up"]["tmp_name"]; $dest = $_FILES["up"]["name"]; move_uploaded_file($src, $dest); }