'PHP is giving me different results with same values just different ways

This is my code:

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<link rel="stylesheet" href="css/main.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<link href='http://fonts.googleapis.com/css?family=Lato' rel='stylesheet' type='text/css'>
 <meta name="viewport" content="width=device-width, initial-scale=1"><title>Day Calculator V 2.0</title>
</head>
<body>
<h1><p class="text-center"><strong>Esta es una calculadora de dias, funciona seleccionando de que mes a que mes quieres calcular los dias. </strong></p></h1>
<form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>" method=post>
<div class="center-block text-center nofloat">
    <input type=radio id="rad1" class="" name="tipfech" onclick="var divOne = document.getElementById('1');
    divOne.style.visibility='hidden'" value="actual" checked> Usar fecha actual<br>
</div>
<div class="center-block text-center nofloat">
  <input type=radio id="rad2" name="tipfech" onclick="var divOne = document.getElementById('1');
divOne.style.visibility='visible'" value="fecha"> Seleccionar fecha </div>
  <div id="1" class="text-center">
    <script>
    var divOne = document.getElementById('1');
divOne.style.visibility='hidden';
</script>
    Del 
    <input class="formachica form-control center-block" type="date" name="date1">
    </div>
  <div class="text-center">
    Al
    </div>
    <input class="formachica form-control center-block" type="date" name="date2">
    <br/>
<input type=submit class="center-block btn btn-primary" value="Submit"/>
</form>
<br/>
</div>
<div id="3" class="text-center">
<?php
$tipfech = $_POST[tipfech];
$da1 = $_POST[date1];
$da2 = $_POST[date2];
if ($tipfech == "actual"){
    $yr1 = date("Y");
    $month = date("m");
    $day1 = date("d");
    $date1 = new DateTime("$yr1-$month-$day1");
    }
$date1 = new DateTime("$da1");
$date2 = new DateTime("$da2");
$interval = $date1->diff($date2);
echo "Son " . $interval->y . " años, " . $interval->m." meses, ".$interval->d." dias "; 

// shows the total amount of days (not divided into years, months and days like above)
echo "<br/>"."Son " . $interval->days . " dias ";
?>
</div>
</body>
</html>

My "fecha actual" is current date, so when i select that option lets say in 02/08/2015 (dd-mm-yy) and the second date to 04/08/2015 it returns one day but if i pick the first date manually (same 02/08/2015) it returns two days.

Examples: http://monopolo11.ninja/tests/imgs/ (the photos are there since i could put it in the post because of my low reputation)

Why is this happening?

Example 1: Example 1 Example 2: Example 2

phphtml


Solution 1:[1]

Fixed it thanks to chumkiu. I added this:

  if ($tipfech !== "actual"){
    $date1 = new DateTime("$da1");
    }

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 vinzee

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