check for errors with === FALSE or === 0
dec() will increase to 3, 2, 1, 0, -1, -2, -3....
if you check with == FALSE you will get an wrong FALSE result if the variable is on 0.
(PECL apc >= 3.1.1)
apc_dec — Decrease a stored number
$key
[, int $step = 1
[, bool &$success
]] )Decreases a stored integer value.
keyThe key of the value being decreased.
stepThe step, or value to decrease.
successOptionally pass the success or fail boolean value to this referenced variable.
Returns the current value of key's value on success,
or FALSE on failure
Example #1 apc_dec() example
<?php
echo "Let's do something with success", PHP_EOL;
apc_store('anumber', 42);
echo apc_fetch('anumber'), PHP_EOL;
echo apc_dec('anumber'), PHP_EOL;
echo apc_dec('anumber', 10), PHP_EOL;
echo apc_dec('anumber', 10, $success), PHP_EOL;
var_dump($success);
echo "Now, let's fail", PHP_EOL, PHP_EOL;
apc_store('astring', 'foo');
$ret = apc_dec('astring', 1, $fail);
var_dump($ret);
var_dump($fail);
?>
The above example will output something similar to:
Let's do something with success 42 41 31 21 bool(true) Now, let's fail bool(false) bool(false)
check for errors with === FALSE or === 0
dec() will increase to 3, 2, 1, 0, -1, -2, -3....
if you check with == FALSE you will get an wrong FALSE result if the variable is on 0.