session — read a session variable
string session( |
sessionvar) ; |
string | sessionvar ; |
Returns the value of the session variable sessionvar. If no such session variable exists then "" is returned.
Example 48. session Example
// Get the next counter value. The counter starts at zero and is increased // each time the page is accessed. Note that the first time the page is // accesses the session variable "next-counter-value" won't exist so // session("next-counter-value") will return "", but (int)"" is defined to be // zero so it all works as expected. int counter = (int)session("next-counter-value"); setsession("next-counter-value", (string)(counter + 1));