<?php
function print_counter_info($counter)
{
if (is_resource($counter)) {
printf("Counter's name is '%s' and is%s persistent. Its current value is %d.\n",
counter_get_meta($counter, COUNTER_META_NAME),
counter_get_meta($counter, COUNTER_META_IS_PERSISTENT) ? '' : ' not',
counter_get_value($counter));
} else {
print "Not a valid counter!\n";
}
}
if (($counter_one = counter_get_named("one")) === NULL) {
$counter_one = counter_create("one", 0, COUNTER_FLAG_PERSIST);
}
counter_bump_value($counter_one, 2);
$counter_two = counter_create("two", 5);
$counter_three = counter_get_named("three");
$counter_four = counter_create("four", 2, COUNTER_FLAG_PERSIST | COUNTER_FLAG_SAVE | COUNTER_FLAG_NO_OVERWRITE);
counter_bump_value($counter_four, 1);
print_counter_info($counter_one);
print_counter_info($counter_two);
print_counter_info($counter_three);
print_counter_info($counter_four);
?>
When run once, the above example outputs:
Counter's name is 'one' and is persistent. Its current value is 2.
Counter's name is 'two' and is not persistent. Its current value is 5.
Not a valid counter!
Counter's name is 'four' and is persistent. Its current value is 3.
If run a second time within the same instance of PHP, it outputs:
Counter's name is 'one' and is persistent. Its current value is 4.
Counter's name is 'two' and is not persistent. Its current value is 5.
Not a valid counter!
Counter's name is 'four' and is persistent. Its current value is 4.
If then run a third time in a different instance of
PHP, it outputs:
Counter's name is 'one' and is persistent. Its current value is 2.
Counter's name is 'two' and is not persistent. Its current value is 5.
Not a valid counter!
Counter's name is 'four' and is persistent. Its current value is 5.
