How to correct an error when I use PHP in a script HTML

Question

I saw in another post in stackoverflow that it was possible to include PHP code in HTML tag but I have this error: "Undefined index: select_years" when I use this code :

<script type="text/javascript">
   console.log(<?php echo $_POST["select_years"];?>);
</script>

have you posted that variable? usually you would have an if around to check if that variable exists — Pete, Jul 19 '19 at 10:43
you shouldn't ever mix PHP and JS - they're executed different and could lead to unexpected behaviour — treyBake, Jul 19 '19 at 10:44
Once you fix the undefined index, you'll probably want to do `console.log();` for safety. — ceejayoz, Jul 19 '19 at 15:18
What makes you think that this error is in any way related to Javascript? Why not check for array indices before using them, in the same way you would do it in pure PHP? — Nico Haase, Jul 19 '19 at 15:18

score 0 · Answer 1 · answered Jul 19 '19 at 10:47

0

For post, get or request methods before printing or using them check if the request is submitted or not.

<?php
if(isset($_POST["select_years"])){
?>
<script type="text/javascript">
   console.log(<?php echo $_POST["select_years"];?>);
</script>
<?php
}
?>

answered Jul 19 '19 at 10:47

Rohit Guleria

72
1
12

Can you explain further where your code checks whether a request was submitted or not? – Nico Haase Jul 19 '19 at 15:19

score -1 · Accepted Answer · answered Jul 19 '19 at 11:17

-1

 <?php
 $select_years="";
 if(isset($_POST["select_years"])){
    $select_years=$_POST["select_years"];
 }
 ?>

 <script type="text/javascript">
 console.log("<?php echo $select_years;?>"); //Added Double Quotes
 </script>

Try This, works for sure

answered Jul 19 '19 at 11:17

Brindha Baskaran

185
2
16

Please add some more explanation to your code such that others can learn from it – Nico Haase Jul 19 '19 at 15:19

How to correct an error when I use PHP in a script HTML

2 Answers2