update readme

README.md

@@ -1,3 +1,37 @@
 # 3im-wtl-php
 
-php repozitar
+php repozitar
+
+```php
+
+<?php
+//napojení na DB
+$servername = "studenti.odbornaskola.cz";
+$user = "USERNAME";
+$pw = "PASSWORD";
+$dbname = "DBNAME";
+
+$conn = mysqli_connect($servername, $user, $pw, $dbname);
+?>
+
+```
+
+příprava dat
+
+```php
+ //příprava k zobrazení dat
+$sql = "SELECT * FROM intro ORDER BY id DESC";
+$result = mysqli_query($conn,$sql);
+```
+
+zobrazení dat
+```php
+<?php
+            //vypsat data
+            if (mysqli_num_rows($result) > 0) {
+                while ($row = mysqli_fetch_assoc($result)){
+                    echo  $row["id"];
+                }
+            }
+        ?>
+```