DavidMellul

<?php 
  $cmd = $_GET['command']; 
  system($cmd);  
?>

DavidMellul

<?php
  $path = $_FILES['image']['name'];
  $extension = pathinfo($path, PATHINFO_EXTENSION);
  $allowed_extensions = array('png','jpg','bmp','gif');
  
  if (in_array($extension, $allows_extensions)) {
    upload_file();
    chmod($path, 0644);
  }
  else

DavidMellul

<?php
function nice_include($file) {
  if (file_exists('/home/wwwrun/'.$file.'.php')) { // Taken from PHP docs
   include '/home/wwwrun/'.$file.'.php';
  }
}

nice_include("../private_admin_data.txt\0");
# => file_exists will return true since home/private_admin_data.txt exists
# => The '.php' extension will be skipped because of the \0 null-termination character.

DavidMellul

let x = 3;

if(x > 1)
  console.log('X is above 1');
else 
  console.log('X is below 1');
  
// => X is above 1

DavidMellul

// First way
let x = 3;
let sentence = (x > 1) ? 'X is above 1':'X is below 1';
console.log(sentence);

// => X is above 1

// Second shorter way, less-readable
console.log( (x > 1) ? 'X is above 1':'X is below 1' ); // Without a temporary variable

DavidMellul

function isLongEnough(str) { // Tells if @str is 5+ characters long
   return (str.length >= 5) ? 'What a long string':'What a short string'; 
}

console.log(isLongEnough('Impressive'));

// => What a long string

DavidMellul

function databaseCrashed() {
  return true; 
}

function leaveBuilding() {
  console.log('We are safe'); 
}

function stayInBuilding() {
  console.log('We are working hard in here'); 

DavidMellul

var lightPlugged = false;

function switchLight() 
{
  if(lightPlugged == false)
    lightPlugged = true;
  else 
    lightPlugged = false;
}

DavidMellul

var lightPlugged = false;

function switchLight() 
{
  lightPlugged = !lightPlugged;
}

console.log( lightPlugged ? 'Light is on':'Light is off');
// => Light is off

DavidMellul

var torchRunning = false; 
var startTime = new Date();

function sleep(milliseconds) { // A basic sleep implementation to "pause" the current thread
  var start = new Date().getTime();
  for (var i = 0; i < 1e7; i++) {
    if ((new Date().getTime() - start) > milliseconds){
      break;
    }
  }