(PECL apc >= 3.1.1)
apc_inc — Increase a stored number
int apc_inc ( string $key [, int $step = 1 [, bool &$success ]] )
Increases a stored number.
key
The key of the value being increased.
step
The step, or value to increase.
success
Optionally 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_inc() example
<?php
echo "Let's do something with success", PHP_EOL;
apc_store('anumber', 42);
echo apc_fetch('anumber'), PHP_EOL;
echo apc_inc('anumber'), PHP_EOL;
echo apc_inc('anumber', 10), PHP_EOL;
echo apc_inc('anumber', 10, $success), PHP_EOL;
var_dump($success);
echo "Now, let's fail", PHP_EOL, PHP_EOL;
apc_store('astring', 'foo');
$ret = apc_inc('astring', 1, $fail);
var_dump($ret);
var_dump($fail);
?> The above example will output something similar to:
42 43 53 63 bool(true) Now, let's fail bool(false) bool(false)
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https://secure.php.net/manual/en/function.apc-inc.php