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Web-PHP

PHP / apcu_exists — DevDocs

apcu_exists

(PECL apcu >= 4.0.0)

apcu_exists — Checks if entry exists

Description 

apcu_exists(mixed $keys): mixed

Checks if one or more APCu entries exist.

Parameters

keys

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

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.

Examples

Example #1 apcu_exists() example 

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

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

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

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

echo PHP_EOL;

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

?>

The above example will output something similar to: 

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

See Also

  • apcu_cache_info() - Retrieves cached information from APCu's data store
  • apcu_fetch() - Fetch a stored variable from the cache

PHP / apcu_fetch — DevDocs

apcu_fetch

(PECL apcu >= 4.0.0)

apcu_fetch — Fetch a stored variable from the cache

Description 

apcu_fetch(mixed $key, bool &$success = ?): mixed

Fetches an entry from the cache.

Parameters

key

The key used to store the value (with apcu_store() ). If an array is passed then each element is fetched and returned.

success

Set to true in success and false in failure.

Return Values

The stored variable or array of variables on success; false on failure

Changelog

Version Description
PECL apcu 3.0.17 The success parameter was added.

Examples

Example #1 A apcu_fetch() example 

<?php
$bar = 'BAR';
apcu_store('foo', $bar);
var_dump(apcu_fetch('foo'));
?>

The above example will output: 

string(3) "BAR"

See Also

  • apcu_store() - Cache a variable in the data store
  • apcu_delete() - Removes a stored variable from the cache
  • APCUIterator
Read article

PHP / apcu_inc — DevDocs

apcu_inc

(PECL apcu >= 4.0.0)

apcu_inc — Increase a stored number

Description 

apcu_inc(
 string $key,
 int $step = 1,
 bool &$success = ?,
 int $ttl = 0
): int|false

Increases a stored number.

Parameters

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.

ttl

TTL to use if the operation inserts a new value (rather than incrementing an existing one).

Return Values

Returns the current value of key 's value on success, or false on failure

Examples

Example #1 apcu_inc() example 

<?php
echo "Let's do something with success", PHP_EOL;

apcu_store('anumber', 42);

echo apcu_fetch('anumber'), PHP_EOL;

echo apcu_inc('anumber'), PHP_EOL;
echo apcu_inc('anumber', 10), PHP_EOL;
echo apcu_inc('anumber', 10, $success), PHP_EOL;

var_dump($success);

echo "Now, let's fail", PHP_EOL, PHP_EOL;

apcu_store('astring', 'foo');

$ret = apcu_inc('astring', 1, $fail);

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

The above example will output something similar to: 

Let's do something with success
42
43
53
63
bool(true)
Now, let's fail

bool(false)
bool(false)

See Also

  • apcu_dec() - Decrease a stored number
Read article

PHP / apcu_key_info — DevDocs

apcu_key_info

(No version information available, might only be in Git)

apcu_key_info — Get detailed information about the cache key

Description 

apcu_key_info(string $key): ?array

Get detailed information about the cache key

Parameters

key

Get detailed information about the cache key

Return Values

An array containing the detailed information about the cache key, or null if the key does not exist.

Examples

Example #1 A apcu_key_info() example 

<?php
apcu_add('a','b');
var_dump(apcu_key_info('a'));
?>

The above example will output: 

array(7) {
  ["hits"]=>
  int(0)
  ["access_time"]=>
  int(1606701783)
  ["mtime"]=>
  int(1606701783)
  ["creation_time"]=>
  int(1606701783)
  ["deletion_time"]=>
  int(0)
  ["ttl"]=>
  int(0)
  ["refs"]=>
  int(0)
}

See Also

  • apcu_store() - Cache a variable in the data store
  • apcu_fetch() - Fetch a stored variable from the cache
  • apcu_delete() - Removes a stored variable from the cache
Read article

PHP / apcu_sma_info — DevDocs

apcu_sma_info

(PECL apcu >= 4.0.0)

apcu_sma_info — Retrieves APCu Shared Memory Allocation information

Description 

apcu_sma_info(bool $limited = false): array|false

Retrieves APCu Shared Memory Allocation information.

Parameters

limited

When set to false (default) apcu_sma_info() will return a detailed information about each segment.

Return Values

Array of Shared Memory Allocation data; false on failure.

Examples

Example #1 A apcu_sma_info() example 

<?php
print_r(apcu_sma_info());
?>

The above example will output something similar to: 

Array
(
    [num_seg] => 1
    [seg_size] => 31457280
    [avail_mem] => 31448408
    [block_lists] => Array
        (
            [0] => Array
                (
                    [0] => Array
                        (
                            [size] => 31448408
                            [offset] => 8864
                        )

                )

        )

)

See Also

  • APCu configuration directives
Read article

PHP / apcu_store — DevDocs

apcu_store

(PECL apcu >= 4.0.0)

apcu_store — Cache a variable in the data store

Description 

apcu_store(string $key, mixed $var, int $ttl = 0): bool
apcu_store(array $values, mixed $unused = NULL, int $ttl = 0): array

Cache a variable in the data store.

Note : Unlike many other mechanisms in PHP, variables stored using apcu_store() will persist between requests (until the value is removed from the cache).

Parameters

key

Store the variable using this name. key s are cache-unique, so storing a second value with the same key will overwrite the original value.

var

The variable to store

ttl

Time To Live; store var in the cache for ttl seconds. After the ttl has passed, the stored variable will be expunged from the cache (on the next request). If no ttl is supplied (or if the ttl is 0 ), the value will persist until it is removed from the cache manually, or otherwise fails to exist in the cache (clear, restart, etc.).

values

Names in key, variables in value.

Return Values

Returns true on success or false on failure. Second syntax returns array with error keys.

Examples

Example #1 A apcu_store() example 

<?php
$bar = 'BAR';
apcu_store('foo', $bar);
var_dump(apcu_fetch('foo'));
?>

The above example will output: 

string(3) "BAR"

See Also

  • apcu_add() - Cache a new variable in the data store
  • apcu_fetch() - Fetch a stored variable from the cache
  • apcu_delete() - Removes a stored variable from the cache
Read article