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apc_exists

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(PECL apc >= 3.1.4)

apc_exists — Checks if APC key exists

Description

apc_exists ( mixed $keys ) : mixed

Checks if one or more APC keys exist.

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Parameters

keys

A string, or an array of strings, that contain keys.

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Return Values

Returns TRUE if the key exists, otherwise FALSE Or if an array was passed to keys, then an array is returned that contains all existing keys, or an empty array if none exist.

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Examples

Example #1 apc_exists() example

<?php
$fruit  = 'apple';
$veggie = 'carrot';

apc_store('foo', $fruit);
apc_store('bar', $veggie);

if (apc_exists('foo')) {
    echo "Foo exists: ";
    echo apc_fetch('foo');
} else {
    echo "Foo does not exist";
}

echo PHP_EOL;
if (apc_exists('baz')) {
    echo "Baz exists.";
} else {
    echo "Baz does not exist";
}

echo PHP_EOL;

$ret = apc_exists(array('foo', 'donotexist', 'bar'));
var_dump($ret);

?>

The above example will output something similar to:

Foo exists: apple
Baz does not exist
array(2) {
  ["foo"]=>
  bool(true)
  ["bar"]=>
  bool(true)
}

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See Also

Find a PHP function

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Document created the 30/01/2003, last modified the 26/10/2018
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References

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