CODEWITHSUNDEEP
javascriptphpjquerycookies
Atnaize
Atnaize

Reputation: 1816

Check if cookie is still valid

In our intranet, each user can log in and cookies are created when the user is sucessfully connected

setcookie('id_user', $res['id_user'], time()+600, '/');
setcookie('email', $res['mail'], time()+600, '/');
setcookie('firstname', $res['firstname'], time()+600, '/');
setcookie('lastname', $res['name'], time()+600, '/');

They will expire after 10 min.

I have many pages where js function are using the $_COOKIE variables. I do not want to check if $_COOKIE is null or not for every function.

Is there a way to trigger a js function to check if the cookie is still available ?

I tried this

var user = '<?php echo $_COOKIE['id_user']; ?>';

function check()
{
    if(user === null)
    {
        console.log('logged');
    }
    else
    {
        console.log('disconnected');
    }
}

check();
setInterval(check, 1000);

But it did not worked. When I'm connected before accessing to this page. The console is always showing 'connected' even when I disconnect from another page. I think the cookie is still present in the page and did not expire.

And if I am not connected before accessing the page, an js error tell me

SyntaxError: unterminated string literal


var user = '<br />

Upvotes: 2

Views: 6684

Answers (1)

Atnaize
Atnaize

Reputation: 1816

I managed this using the following js. This code will check every sec if the cookie is still available.

function check()
{
    var user = getCookie('firstname');

    if(user == '')
    {
        console.log('disconnected');
    }
    else
    {
        console.log('connected');
    }
}

function getCookie(cname) {
    var name = cname + "=";
    var ca = document.cookie.split(';');
    for(var i=0; i<ca.length; i++) {
        var c = ca[i];
        while (c.charAt(0)==' ') c = c.substring(1);
        if (c.indexOf(name) == 0) return c.substring(name.length,c.length);
    }
    return "";
} 

check();
setInterval(check, 1000);

Upvotes: 2

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