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Highlighting Code on page - new feature for CI4 blog project

User authentication is very common in modern web application. It is a security mechanism that is used to restrict unauthorized access to member-only areas and tools on a site.

In this tutorial we'll create a simple registration and login system using the PHP and MySQL. This tutorial is comprised of two parts: in the first part we'll create a user registration form, and in the second part we'll create a login form, as well as a welcome page and a logout script.


Example of HTML Markup

<textarea name="text_editor" id="text_editor" ></textarea>
CKEDITOR.replace( 'text_editor', {                  

Example of PHP code

$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;

Example od python code:

import requests
dfile = open("datafile.txt", "rb")
url = ""
test_res =, files = {"form_field_name": dfile})
if test_res.ok:
    print(" File uploaded successfully ! ")
    print(" Please Upload again ! ")