如何在Wordpress中将变量发送到function.php

Question

I want to save cookies using onclick function in my wordpress blog. So I put this code in function.php

add_action( 'init', 'setting_my_first_cookie' );

function setting_my_first_cookie() {

echo $v_username;
echo "This can be echo";
setcookie('username' , 'Rajeasdasdsdh' , time()+30*24*60*60);
}

On index.php

<?php 
global $v_username;
$v_username="demo"; 
$v_value="asd";
?>

<th><a href="" onclick="setting_my_first_cookie()">Set Cookie</a></th>

I am retriving this cookie using this code:

<?php
// Accessing an individual cookie value
echo $_COOKIE["username"];
?>

Everything is working but I cant set that cookies using variable. I cant pass $v_username to function. How to do it? I want echo or alert $v_username in my function setting_my_first_cookie()

Answer 1

You can use include_once or include at your index.php

Try this code for index.php :

<?php 
global $v_username;
$v_username="demo"; 
$v_value="asd";
include_once('function.php')    
?>

<th><a href="" onclick= <?php setting_my_first_cookie(); ?> >Set Cookie</a></th>

Answer 2

In your particular case problem is:

This hook in which you are hooked add_action( 'init', 'setting_my_first_cookie' ); will run your function setting_my_first_cookie in specific place in your application, in this case, according Codex,

after WordPress has finished loading but before any headers are sent

So if you try to debug your application, you will see that setting_my_first_cookie runs before your index.php file.

But in general, using global variables to pass parameters to functions is not good practice.

And this function will run always, so your cookie will be set always.

Answer 3

OK I found the solution for me:

I used java script to get PHP variable and set cookies using them. I added this code in header.php But its also working if we add it in function.php

<script type="text/javascript"> 

function setting_my_first_cookie(variid,variname) {
 var d = new Date();
    d.setTime(d.getTime() + (30*24*60*60*1000));
    var expires = "expires="+d.toUTCString();
    document.cookie = variname + "=" + variid + "; " + "expires; path=/; domain=.cinemoids.com";
}
</script>

<script type="text/javascript"> 

function setting_my_first_cookie_delete(variid,variname) {
   document.cookie = variname + '=; expires=Thu, 01 Jan 1970 00:00:01 GMT; path=/; domain=.cinemoids.com';
}
</script>