Add registration feature

php/config.php

@@ -0,0 +1,11 @@
+<?php
+  $hostname = "localhost:3200";
+  $username = "root";
+  $password = "";
+  $dbname = "chatline";
+
+  $conn = mysqli_connect($hostname, $username, $password, $dbname);
+  if(!$conn){
+    echo "Database connection error".mysqli_connect_error();
+  }
+?>

php/register.php

@@ -0,0 +1,84 @@
+<?php
+session_start();
+include_once "config.php";
+function escape($conn, $value) {
+    return mysqli_real_escape_string($conn, $value);
+}
+function isValidEmail($email) {
+    return filter_var($email, FILTER_VALIDATE_EMAIL);
+}
+function moveUploadedFile($tempFileName, $newFileName) {
+    return move_uploaded_file($tempFileName, "images/" . $newFileName);
+}
+function generateUniqueUserId() {
+    return rand(time(), 100000000);
+}
+function encryptPassword($password) {
+    return md5($password);
+}
+function fetchUserByEmail($conn, $email) {
+    $email = escape($conn, $email);
+    $sql = mysqli_query($conn, "SELECT * FROM users WHERE email = '{$email}'");
+    return mysqli_fetch_assoc($sql);
+}
+function insertUser($conn, $unique_id, $first_name, $last_name, $email, $encrypt_pass, $new_img_name, $status) {
+    return mysqli_query($conn, "INSERT INTO users (unique_id, first_name, last_name, email, password, img, status) VALUES ({$unique_id}, '{$first_name}','{$last_name}', '{$email}', '{$encrypt_pass}', '{$new_img_name}', '{$status}')");
+}
+function loginUser($user) {
+    $_SESSION["unique_id"] = $user["unique_id"];
+    echo "success";
+}
+if (!empty($_POST["first_name"]) || !empty($_POST["last_name"]) || !empty($_POST["email"]) || !empty($_POST["password"])) {
+    $first_name = escape($conn, $_POST["first_name"]);
+    $last_name = escape($conn, $_POST["last_name"]);
+    $email = escape($conn, $_POST["email"]);
+    $password = escape($conn, $_POST["password"]);
+    if (isValidEmail($email)) {
+        $existingUser = fetchUserByEmail($conn, $email);
+        if ($existingUser) {
+            echo "The email address $email already exists!";
+        } else {
+            if (isset($_FILES["image"])) {
+                $img_name = $_FILES["image"]["name"];
+                $img_type = $_FILES["image"]["type"];
+                $temp_file_name = $_FILES["image"]["tmp_name"];
+                $img_ext = pathinfo($img_name, PATHINFO_EXTENSION);
+                $allowedExtensions = ["jpeg", "png", "jpg"];
+                if (in_array($img_ext, $allowedExtensions) && in_array($img_type, ["image/jpeg", "image/jpg", "image/png", ])) {
+                    $time = time();
+                    $new_img_name = $time . $img_name;
+                    if (moveUploadedFile($temp_file_name, $new_img_name)) {
+                        $unique_id = generateUniqueUserId();
+                        $status = "Active now";
+                        $encrypt_pass = encryptPassword($password);
+                    } else {
+                        echo "An error occurred while uploading the image.";
+                        exit();
+                    }
+                } else {
+                    echo "Image must be of the following formats: JPEG, JPG, PNG.";
+                    exit();
+                }
+            } else {
+                $unique_id = generateUniqueUserId();
+                $status = "Active now";
+                $encrypt_pass = encryptPassword($password);
+            }
+            if (insertUser($conn, $unique_id, $first_name, $last_name, $email, $encrypt_pass, $new_img_name, $status)) {
+                $loggedInUser = fetchUserByEmail($conn, $email);
+                if ($loggedInUser) {
+                    loginUser($loggedInUser);
+                } else {
+                    echo "An error occurred. Please try again.";
+                }
+            } else {
+                echo "An error occurred. Please try again.";
+            }
+        }
+    } else {
+        echo "The email address $email is not valid!";
+    }
+} else {
+    echo "All input fields are required!";
+}
+?>