Extended interface
Extended interface
Extended interface
The extended interface provides a small suite of
functions that allow the user to define an arbitrary number of
named counters with unique settings. The basic interface can be
used in parallel with the extended interface.
Example #1 “counter”‘s extended interface
<?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.