Automatic image format detection in PHP

This is one of the functions of getimagesize. They probably should have called it "getimageinfo", but that's PHP for you.

   //Image Processing    $cover = $_FILES['cover']['name'];    $cover_tmp_name = $_FILES['cover']['tmp_name'];    $cover_img_path = '/images/';    $type = exif_imagetype($cover_tmp_name);if ($type == (IMAGETYPE_PNG || IMAGETYPE_JPEG || IMAGETYPE_GIF || IMAGETYPE_BMP)) {        $cover_pre_name = md5($cover);  //Just to make a image name random and cool :D/** * @description : possible exif_imagetype() return values in $type * 1 - gif image * 2 - jpg image * 3 - png image * 6 - bmp image */        switch ($type) {    #There are more type you can choose. Take a look in php manual -> http://www.php.net/manual/en/function.exif-imagetype.php            case '1' :                $cover_format = 'gif';                break;            case '2' :                $cover_format = 'jpg';                break;            case '3' :                $cover_format = 'png';                break;            case '6' :                $cover_format = 'bmp';                break;            default :                die('There is an error processing the image -> please try again with a new image');                break;        }    $cover_name = $cover_pre_name . '.' . $cover_format;      //Checks whether the uploaded file exist or not            if (file_exists($cover_img_path . $cover_name)) {                $extra = 1;                while (file_exists($cover_img_path . $cover_name)) {        $cover_name = md5($cover) . $extra . '.' . $cover_format;                    $extra++;                }            }     //Image Processing Ends

this will make image name look cool and unique

Use exif_imagetype() if it's available ..:

http://www.php.net/manual/en/function.exif-imagetype.php

I'm pretty sure exif functions are available by default (i.e. you have to specifically exclude them rather than specifically include them) when you install php