PHP Unconference Europe 2015

apc_dec

(PECL apc >= 3.1.1)

apc_decDecrease a stored number

Beschreibung

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

Decreases a stored integer value.

Parameter-Liste

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.

Rückgabewerte

Returns the current value of key's value on success, Im Fehlerfall wird FALSE zurückgegeben.

Beispiele

Beispiel #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);
?>

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

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

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

Siehe auch

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User Contributed Notes 1 note

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1
elfi47
2 years 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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