How to echo a JS variable to php?

Question

Is that possible to pass a JS variable to PHP ?

My code is :

document.getElementById('designation_' + i).value = '<?php echo $list[HERE]; ?>';

where I is in a for loop.

I want to echo the $list array in PHP with the index I of my JS (instead of HERE). First, is that possible? If yes, how?

PHP is server side. It can output to a DOM, but once the DOM is rendered JavaScript takes over. You can't echo PHP from JS, but you can instantiate JS variables with PHP and console.log that. — zfrisch, Jun 25 '18 at 16:07
You can try `$i=1` and then `document.getElementById('designation_' + ).value = '';` — dhaker, Jun 25 '18 at 16:09

score -2 · Accepted Answer · edited Aug 17 '20 at 17:46

-2

You can not pass the JavaScript variable up to PHP to index the $list array. What you can do is to pass the whole array down to JavaScript as JSON encoded and then index into that.

See: Convert php array to Javascript

edited Aug 17 '20 at 17:46

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answered Jun 25 '18 at 16:15

Chris Buck

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How to echo a JS variable to php?

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