PHP Static Variable

In the previous chapters we have already seen the different types of PHP variables such as Function parameter,Local variable and Global variable.

PHP Static Variable :

  1. We know that, when function ends then all the variables declared inside the function are destroyed.
  2. Static variables are those variables which can hold value when function called again.
  3. Static variables are declared with preceding keyword static.

Example : PHP Static Variable

<!DOCTYPE html>
<html>
<body>
<?php
function modify() {
    STATIC $count;
    $count++;
    print "Count is : $count";
    print "<br />";
}
modify();
modify();
modify();
modify();
modify();
?>
</body>
</html>

Output :

Count is : 1
Count is : 2
Count is : 3
Count is : 4
Count is : 5

Explanation :

We have called function modify() 3 times. Each time previous value is retained and value is modified by the function each time.

STATIC $count;
$count++;
print "Count is : $count";