Help js code mixed with php code usage exception

Question

How to call the php function in js, js passes in the variable, and the php function returns it to the js variable after processing. I can't read what I wrote. , error report,. It's OK to apply script to PHP, but it won't work if you apply script to PHP. . Specifically, I want to know how to directly transfer variables

<script> var a="1001"; var op='666'; od="<?php $b=op; echo jia($b) ; a variable: '.$b; function jia($c){ //$c="<script>document.write(op)</script>"; return $c.'---8888'; } ?>

Answer 1

<script>

var a='1001';

var op='666';

od="<?php $bb=' 888'; $b='<script>document.write(op)</script>'; echo jia($b);

##</script><?php                                                                                                                 ';

echo 'a variable:'.$b;

function jia($c){

return $c.'---8888';

}

?>

I mainly want to get the js variables in js and return them after execution in php. . .

Answer 2

If you want to pass a value, you can use session

Answer 3

As I told you, the PHP code is executed first

The op variable is not defined in PHP

Answer 4

Parse PHP first, then parse JS