PHP 5.4.31 Released

apc_dec

(PECL apc >= 3.1.1)

apc_decDecrease a stored number

Descrizione

int apc_dec ( string $key [, int $step = 1 [, bool &$success ]] )

Decreases a stored integer value.

Elenco dei parametri

key

The key of the value being decreased.

step

The step, or value to decrease.

success

Optionally pass the success or fail boolean value to this referenced variable.

Valori restituiti

Returns the current value of key's value on success, o FALSE in caso di fallimento

Esempi

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_EOLPHP_EOL;

apc_store('astring''foo');

$ret apc_dec('astring'1$fail);

var_dump($ret);
var_dump($fail);
?>

Il precedente esempio visualizzerĂ  qualcosa simile a:

Let's do something with success
42
41
31
21
bool(true)

Now, let's fail
bool(false)
bool(false)

Vedere anche:

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User Contributed Notes 1 note

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1
elfi47
1 year ago
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.
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