Learning PHP
Advanced PHP
PHP Function Reference
PHP Useful Resources
Selected Reading
© 2011 TutorialsPoint.COM
|
PHP Static Variables
Scope can be defined as the range of availability a variable has to the program in which it is declared. PHP variables can be one of four scope types:
Local variables
Function parameters
Global variables
Static variables.
Static Variables:
The final type of variable scoping that I discuss is known as static. In contrast to the variables declared as function parameters, which are destroyed on the function's exit, a static variable will not lose its value when the function exits and will still hold that value should the function be called again.
You can declare a variable to be static simply by placing the keyword STATIC in front of the variable name.
<?
function keep_track() {
STATIC $count = 0;
$count++;
print $count;
print " ";
}
keep_track();
keep_track();
keep_track();
?>
|
This will produce following result.
|
|
|