commented

create.php

@@ -39,7 +39,7 @@ session_start();
         <div class='form'>
         <form class = 'form-group' style='text-align:center' action = "./php/createTask.php" method="POST" onsubmit="return dateValid()"> 
             <label class="form-control-label"> Date : </label>
-            <input type="text" name="date" id = 'date' onchange='dateValid();' required> <!-- <span id = 'dateText'> </span>  -->
+            <input type="text" name="date" id = 'date' onchange='dateValid();' required> <!-- <span id = 'dateText'> </span>  --> <!-- Datev alidation  -->
             
             <br><br><br>
             <label class="form-control-label" > Time : </label> 
@@ -48,7 +48,7 @@ session_start();
             <label class="form-control-label"> Task (upto 300 characters) :  </label>
             <textarea rows = "6" cols= "40" name = "todo" maxlength="300" required></textarea> <br> <br>
             
-            <input class="btn btn-outline-success" type="submit" name = "submit" value="submit" id='submit'> <br>
+            <input class="btn btn-success" type="submit" name = "submit" value="submit" id='submit'> <br>
         </form>
         </div>
 

edit.php

@@ -39,7 +39,7 @@ require "php/db_conn.php";
     </nav>
 
     <h2 style="text-align: center; margin-top:80px; margin-bottom:30px;"> Edit Task </h2>
-
+    <!-- Date and time validaion occurs at when submit button is pressed, if on of the is false, submission does not happen. -->
     <form class = 'form-group' style='text-align:center' method="POST" onsubmit="return (dateValid() && timeValid());" action="php/updateData.php">
         <label class="form-control-label"> Date : </label>
         <textarea name="date" rows="1" cols="10" id="date" onfocusout="dateValid()"><?php echo($row['t_date']); ?></textarea><br> <br>

index.php

 <?php
-require 'Twig/lib/Twig/Autoloader.php';
+/*
+ * Index page script. 
+ * loads the twig auto loader. checks if the submit button was pressed or not.
+ * If submited, then connects to the database and matches the password with the passhash of the user.
+ * If it matches, session is started and session userName is initialized.
+ * 
+ * If submitted but failed, the the index html is rendered with login = false, meaning that there was a failed login attempt. 
+ * So on the page is notified to try again.
+ * 
+ * If not submitted, then index is rendered but no additional info is sent.
+*/
+
+require 'Twig/lib/Twig/Autoloader.php'; 
 
 Twig_Autoloader::register();
-    // Load twig templating engine
-    $loader = new Twig_Loader_Filesystem('views');
-    $twig = new Twig_Environment($loader);
+    // Loads twig templating engine
+    $loader = new Twig_Loader_Filesystem('views'); //Location of the html pages in the filesystem.
+    $twig = new Twig_Environment($loader); //twig object.
 
     // Enable debugging so we can dump array
-    $twig = new \Twig\Environment($loader, [
-    'debug' => true,
-    ]);
+    $twig = new \Twig\Environment($loader, ['debug' => true,]); //set debugging mode
     $twig->addExtension(new \Twig\Extension\DebugExtension());
 
 if (isset($_POST['submit'])) {

php/serveData.php

 <?php
 require "db_conn.php";
 session_start();
-$taskArray = array();
+$taskArray = array(); //global array used by view.php. array of task objects.
 // $amount = $_POST['amount'];
 class Task
 {
@@ -22,6 +22,12 @@ class Task
     }
 }
 
+/*
+ * functions execute the querries. each function takes a PDO object (in db_conn.php), the reference to $taskArray, and $comp (which is true false or null)
+ * $comp tell which tasks to display, if null it displays all, if 1 only completed if 0, then the ones need to be done.
+ * 
+ * One function also takes in a date string for custom date searches.
+*/
 
 function all($pdo, &$taskArr, $comp) {
     // $date = date('Y-m-d');
@@ -73,8 +79,14 @@ function custom($pdo, &$taskArr, $inputDate, $comp) {
     }
 }
 
-if ($amount == 'all') {
 
+/*
+ * Depending on the value for amount (which means all tasks, or todays task or task for some arbitrary date), different function is executed. 
+ * also in the view.php script. completion value is set .
+ * by default tho, when no info is submitted via post, it executes the last script. which means it will display today's todo list.
+ * 
+*/
+if ($amount == 'all') {
     try {
         all($pdo,$taskArray, $completion);
     } catch (PDOException $p) {
@@ -92,4 +104,11 @@ if ($amount == 'all') {
     } catch (PDOException $p) {
         echo ($p->getMessage() . " " . $p->getLine());
     }
+}  else {
+    try {
+        today($pdo,$taskArray, 0);
+    } catch (PDOException $p) {
+        echo ($p->getMessage() . " " . $p->getLine());
+    }
 }
+

view.php

 <?php
+/*
+ * View page.
+ * Twig is loaded.
+*/
 session_start();
 require 'Twig/lib/Twig/Autoloader.php';
 
@@ -9,9 +13,7 @@ $loader = new Twig_Loader_Filesystem('views');
 $twig = new Twig_Environment($loader);
 
 // Enable debugging so we can dump array
-$twig = new \Twig\Environment($loader, [
-    'debug' => true,
-    ]);
+$twig = new \Twig\Environment($loader, ['debug' => true,]);
     $twig->addExtension(new \Twig\Extension\DebugExtension());
     
     $completion;
@@ -26,9 +28,7 @@ $twig = new \Twig\Environment($loader, [
         $amount = $_POST['amount'];
         $custom = $_POST['custom'];
         require "php/serveData.php";
-        echo $twig->render('view.html', array(
-        'tasks' => $taskArray,
-        ));
+        echo $twig->render('view.html', array('tasks' => $taskArray));
     }
 
 else {