If I have not set any life time in cookies then what is the default life time in cookie?
for e.g
setcookie("cookiename", $value);
When you create a cookie via PHP, the default value for its expiration date is 0, which means that the cookie expires when you close the tab from the manual:
If set to 0, or omitted, the cookie will expire at the end of the session (when your browser closes)
Otherwise, you can set the cookies lifetime in seconds as the third parameter:
From the documentation:
expire
If set to 0, or omitted, the cookie will expire at the end of the session (when the browser closes).
When you create a cookie via PHP Default Value is 0
If set to 0, or omitted, the cookie will expire at end of the session
ie when the browser closes
If set to 0, or omitted, the cookie will expire at the end of the session (when the browser closes).