Add message notification thingie

config.php

@@ -26,4 +26,8 @@ if(!isset($_SESSION["login"])){
 $_IS_LOGGED = $_SESSION["login"] === "true";
 $_IS_ADMIN  = $_SESSION["username"] === "admin";
 
+if(!is_array($_SESSION["msg"])){
+	$_SESSION["msg"] = array();
+}
+
 ?>

include/header.php

@@ -17,6 +17,14 @@
 	#header{
 		text-align: center;
 	}
+	.alert{
+		margin: 20px;
+		padding: 5px;
+		color: orange;
+		border: solid orange 1px;
+		margin: auto;
+		width: 60vw;
+	}
 </style>
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <div id="header">
@@ -41,4 +49,13 @@
 		<input type="text" name="t" value="<?php if($_GET["t"]) echo $_GET["t"]; ?>">
 		<input type="submit">
 	</form>
+
+	<?php
+	if(isset($_SESSION["msg"]) and is_array($_SESSION["msg"])){
+		foreach($_SESSION["msg"] as $message){
+			echo("<div class='alert'>" . $message . "</div>");
+			$_SESSION["msg"] = array();
+		}
+	}
+	?>
 </div>