Quick & Dirty PHP Custom ShareX Uploader

upload.php

<?php
$users = [
    "user1" => "put-the-secret-here",
    "user2" => "another-secret-here",
];

if(isset($_POST['secret'])) {
	if(in_array($_POST['secret'], $users)) {
		// $filename = substr(hash("sha256", random_int(0, PHP_INT_MAX) . time()),0,8) . "." . pathinfo($_FILES["f"]["name"], PATHINFO_EXTENSION);
		$filename = generateRandom(8) . "." . pathinfo($_FILES["f"]["name"], PATHINFO_EXTENSION);

		if (move_uploaded_file($_FILES["f"]["tmp_name"], $filename)) {
			echo "http://your.domain.name/" . $filename;
			file_put_contents("../log.txt", date(DATE_ATOM) . " " . array_search($_POST['secret'], $users) . " " . $filename . "\n", FILE_APPEND | LOCK_EX);
		} else {
			header("HTTP/1.0 500 Internal Server Error");
			die("Internal Server Error");
		}
	} else {
		header("HTTP/1.0 403 Forbidden");
		die("Forbidden");
	}
} else {
	header("HTTP/1.0 400 Bad Request");
	die("Bad Request");
}

// https://gist.github.com/kburnik/2fcbe7b5105c3533ca7b38e32d46a00f
function generateRandom($length = 10, $prefix="") {
  return $prefix . substr(base_convert(md5(uniqid()), 16, 36), 0, $length);
}
?>

uploader.sxcu

{
  "Name": "your.domain.name",
  "DestinationType": "None",
  "RequestType": "POST",
  "RequestURL": "http://your.domain.name/upload.php",
  "FileFormName": "f",
  "Arguments": {
    "secret": "YOUR-SECRET-HERE"
  },
  "ResponseType": "Text"
}