php in .js

.js file can't run php

the way to realize is

a.use .php file to write js

b.

Another way to go is to make a js file within php, so start your .php file with

<?php
header("Content-type: application/javascript");
?>
var jsvar='something';
var othervar='<?php echo $phpVar; ?>';
//<?php //some php ;?>

and then include it on your page like this

http://stackoverflow.com/questions/23574306/executing-php-code-inside-a-js-file?newreg=0bf0537036444cb5ba397ae289f80bcc

c.修改.htaccess

http://stackoverflow.com/questions/3241422/include-php-inside-javascript-js-files

普通的js中（非.js 像html php

var name ="<?php echo 0 ;?>;

就可以