v1.0.1

php/config.php

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+<?php 
+    /* if you're working on localhost then you don't need to change anything
+       but if you're thinking to upload it to live server then you've to edit something
+    1. Paste your website url with forward slash(/) in the domain variable, you don't need 
+       to write https://wwww. before the domain name if you have domain redirection setup
+    2. Change user, pass, db values accordingly mentioned in the comments below
+    3. Go to JavaScript file and search this keyword - let domain - then paste your url there 
+    4. After all changes you've to wait because javascript file save changes may take time to reflect */ 
+
+    $domain = "https://localhost/web-Projects/url/"; //like this: codingnepalweb.com/
+    $host = "localhost";
+    $user = "root"; //Database username
+    $pass = ""; //Database password
+    $db = "urlShortener"; //Database name
+
+    $conn = mysqli_connect($host, $user, $pass, $db);
+    if(!$conn){
+        echo "Database connection error".mysqli_connect_error();
+    }
+?>

php/delete.php

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+<?php
+include "config.php";
+
+if(isset($_GET['id'])){
+    $delete_id = mysqli_real_escape_string($conn, $_GET['id']);
+    $sql = mysqli_query($conn, "DELETE FROM url WHERE shorten_url = '{$delete_id}'");
+    if($sql){
+        echo "success";
+    } else {
+        echo "error";
+    }
+} else {
+    echo "error";
+}
+?>

php/url-controll.php

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+<?php
+    include "config.php";
+    $full_url = mysqli_real_escape_string($conn, $_POST['full_url']);
+    if(!empty($full_url) && filter_var($full_url, FILTER_VALIDATE_URL)){
+        $ran_url = substr(md5(microtime()), rand(0, 26), 5);
+        $sql = mysqli_query($conn, "SELECT * FROM url WHERE shorten_url = '{$ran_url}'");
+        if(mysqli_num_rows($sql) > 0){
+            echo "Something went wrong. Please generate again!";
+        }else{
+            $sql2 = mysqli_query($conn, "INSERT INTO url (full_url, shorten_url, clicks) 
+                                         VALUES ('{$full_url}', '{$ran_url}', '0')");
+            if($sql2){
+                $sql3 = mysqli_query($conn, "SELECT shorten_url FROM url WHERE shorten_url = '{$ran_url}'");
+                if(mysqli_num_rows($sql3) > 0){
+                    $shorten_url = mysqli_fetch_assoc($sql3);
+                    echo $shorten_url['shorten_url'];
+                }
+            }
+        }
+    }else{
+        echo "$full_url - This is not a valid URL!";
+    }
+?>