JS传递变量给PHP：

<script>

      var s = 'js变量的值传递给php'; 

</script>



<?php      

     echo  $c = "<script> document.write(s)</script>";

?>

PHP传递变量给JS：

<?php

    $php = "php 传递变量给 JS";

?>



<script> 



document.write("<?php echo $php; ?>"); 



var js = '<?php echo $php; ?>';

document.write(js);



</script>