[PHP典型模塊與項目實戰大全]-第一章(javascript cookie)

 

javascript 建立 cookie

 

function setCookie(cname, cvalue, exdays) {
    var d = new Date();
    d.setTime(d.getTime() + (exdays*24*60*60*1000));
    var expires = “expires=”+d.toUTCString();
    document.cookie = cname + “=” + cvalue + “; “ + expires;
}

 

javascript 讀取 cookie

 

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 “”;
}

 

javascript 確認 cookie

 

function checkCookie() {
    var username=getCookie(“username”);
    if (username!=“”) {
        alert(“Welcome again “ + username);
    }else{
        username = prompt(“Please enter your name:”, “”);
        if (username != “” && username != null) {
            setCookie(“username”, username, 365);
        }
    }
}