PHP variable assignment, input to the variable in JavaScript, assign javascript_PHP tutorial

Assign values to PHP variables, and assign values to JavaScript variables. PHP variables are assigned values and substituted into the variables in JavaScript. the javascript copy code is as follows: $ (document ). ready (function () {php $ fnamevartphpecho $ f; alert (t)}) or copy the PHP variable to assign values to the variable in JavaScript, and assign values to the javascript variable.

The code is as follows:
$ (Document). ready (function (){

<? Php $ f = "'name'"?>
Var t = <? Php echo $ f?>;
Alert (t)
})

Or
The code is as follows:
$ (Document). ready (function (){

<? Php $ f = "name"?>
Var t = "<? Php echo $ f?> ";
Alert (t)
})

Or
The code is as follows: