Passing simple php date variable to javascript [duplicate]

Question

I have this php:

<?php
$mytestdate = "Oct 23, 2019 20:00:00";
?>

This javascript does not give me the required output:

<script>
var mydate = "<?php echo $mytestdate; ?>";
// Set the date we're counting down to
var countDownDate = new Date(mydate).getTime();
</script>

This javascript does give me the desired output:

<script>
var mydate = "<?php echo $mytestdate; ?>";
// Set the date we're counting down to
var countDownDate = new Date("Oct 23, 2019 20:00:00").getTime();
</script>

What is going wrong?!

The output is either nothing or "NaNd NaNh NaNm NaNs".

you should never mix PHP and JS - they're different languages that get executed differently — treyBake
– treyBake, Commented Oct 21, 2019 at 13:35
try console.log(mydate) and see what is in there first, from there, you can know what's going wrong — Israel Obanijesu
– Israel Obanijesu, Commented Oct 21, 2019 at 13:39
i hope this will help u: stackoverflow.com/questions/46109832/… — devpro
– devpro, Commented Oct 21, 2019 at 13:46

Bilal Siddiqui · Accepted Answer · 2019-10-21 13:52:19Z

3

So when you try to run this code in a HTML file you get NaN as you are claiming,

<!DOCTYPE html>
<html>
<body>
  <?php
   $mytestdate = "Oct 23, 2019 20:00:00";
  ?>
<script>
  var mydate = "<?php echo $mytestdate; ?>";
  var countDownDate = new Date(mydate).getTime();
  alert(countDownDate);
</script>

</body>
</html>

Now, try to save this in a file with .php extension. The code will work and return you the expected result

answered Oct 21, 2019 at 13:52

Bilal Siddiqui

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10 Comments

Neil Reardon Over a year ago

Neil Reardon Over a year ago

This is what is showing in the browser source. It does not seem to output the php.

devpro Over a year ago

@NeilReardon: so it means, your file extension is .PHP not .HTML right?

devpro Over a year ago

store your variable in a hidden input then get this hidden input value in your javascript @NeilReardon

devpro Over a year ago

@BilalSiddiqui: i like your answer ...

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