Sending a PHP session variable to javascript of another file

Question

I extracted data from a CSV file using PHP and stored the data as a nested array. I stored this array as a session variable and now I want to access the array in another html file using javascript. How can this be done?

<?php
    session_start();
    $arr=array();

    $arr['1']=array('abc','def');
    $arr['2']=array('123','456');

    $_SESSION["abc"]=$arr;

?>

This is a sample php. I have to access the session variable in javascript.

Put in to an input? Store it as a cookie? Make use of AJAX? echo (output) it? — Script47
– Script47, Commented Jun 22, 2018 at 8:57
Please visit the help center, take the tour to see what and How to Ask. Do some research, search for related topics on SO; if you get stuck, post a minimal reproducible example of your attempt, noting input and expected output. — mplungjan
– mplungjan, Commented Jun 22, 2018 at 8:58

Aleksey Solovey · Accepted Answer · 2018-06-22 10:31:51Z

2

Yes, you can use implode PHP function to convert your array to string and then echo that string and assign to a JS variable like in example below.

Your another HTML file:

<?php 
    session_start();
    $your_array=$_SESSION['your_array'];
?>
<script>
    var js_variable = [<?php echo implode($your_array,','); ?>];
    console.log(js_variable);
</script>

edited Jun 22, 2018 at 10:31

Aleksey Solovey

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answered Jun 22, 2018 at 9:18

Deepak Vaishnav

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Comments

Mark Smit · Accepted Answer · 2018-06-22 09:52:41Z

0

What you should be aware of, is that php is server side and javascript is client side. So to solve this, you have 2 options:

let the php code add this variables in the head. on to of everything:

<script>
  var php_variables= <?php echo json_encode($your_php_variables); ?>;
</script>

or 2. Make a seperate php file which just echos only the value in json and put a json header:

 <?php 
  header("content-type:application/json");
  echo json_encode($your_php_variables);
 ?>

and then let javascript retrieve it. there are many libraries available for that. but lets take a comon one like jquery:

$.get("yourphpfile.php",function(data){do something here})

answered Jun 22, 2018 at 9:52

Mark Smit

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1 Comment

Akshay Bharadwaj Over a year ago

Your first method helped in retrieving the array into javascript. I confirmed it by doing console.log(). But doing document.write of the variable is giving [object Object]

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