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PHP / apache_child_terminate — DevDocs

apache_child_terminate

(PHP 4 >= 4.0.5, PHP 5, PHP 7, PHP 8)

apache_child_terminate Terminate apache process after this request

Description

apache_child_terminate(): void

apache_child_terminate() will register the Apache process executing the current PHP request for termination once execution of PHP code is completed. It may be used to terminate a process after a script with high memory consumption has been run as memory will usually only be freed internally but not given back to the operating system.

Works in the Apache, and FastCGI webservers.

Parameters

This function has no parameters.

Return Values

No value is returned.

Notes

Note : This function is not implemented on Windows platforms.

See Also

  • exit() - Output a message and terminate the current script
Read article
PHP / apache_get_modules — DevDocs

apache_get_modules

(PHP 4 >= 4.3.2, PHP 5, PHP 7, PHP 8)

apache_get_modules Get a list of loaded Apache modules

Description

apache_get_modules(): array

Get a list of loaded Apache modules.

Parameters

This function has no parameters.

Return Values

An array of loaded Apache modules.

Examples

Example #1 apache_get_modules() example

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

The above example will output something similar to:

Array
(
    [0] => core
    [1] => http_core
    [2] => mod_so
    [3] => sapi_apache2
    [4] => mod_mime
    [5] => mod_rewrite
)
Read article
PHP / apache_get_version — DevDocs

apache_get_version

(PHP 4 >= 4.3.2, PHP 5, PHP 7, PHP 8)

apache_get_version Fetch Apache version

Description

apache_get_version(): string|false

Fetch the Apache version.

Parameters

This function has no parameters.

Return Values

Returns the Apache version on success or false on failure.

Examples

Example #1 apache_get_version() example

<?php
$version = apache_get_version();
echo "$version\n";
?>

The above example will output something similar to:

Apache/1.3.29 (Unix) PHP/4.3.4 

See Also

  • phpinfo() - Outputs information about PHP's configuration
Read article
PHP / apcu_clear_cache — DevDocs

apcu_clear_cache

(PECL apcu >= 4.0.0)

apcu_clear_cache Clears the APCu cache

Description

apcu_clear_cache(): bool

Clears the cache.

Parameters

This function has no parameters.

Return Values

Returns true always

See Also

  • apcu_cache_info() - Retrieves cached information from APCu's data store
Read article
PHP / apcu_dec — DevDocs

apcu_dec

(PECL apcu >= 4.0.0)

apcu_dec Decrease a stored number

Description

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

Decreases a stored integer value.

Parameters

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.

ttl

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

Return Values

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

Examples

Example #1 apcu_dec() example

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

apcu_store('anumber', 42);

echo apcu_fetch('anumber'), PHP_EOL;

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

var_dump($success);

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

apcu_store('astring', 'foo');

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

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

The above example will output something similar to:

Let's do something with success
42
41
31
21
bool(true)
Now, let's fail

bool(false)
bool(false)

See Also

  • apcu_inc() - Increase a stored number
Read article
PHP / apache_getenv — DevDocs

apache_getenv

(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)

apache_getenv Get an Apache subprocess_env variable

Description

apache_getenv(string $variable, bool $walk_to_top = false): string|false

Retrieve an Apache environment variable specified by variable .

Parameters

variable

The Apache environment variable

walk_to_top

Whether to get the top-level variable available to all Apache layers.

Return Values

The value of the Apache environment variable on success, or false on failure

Examples

Example #1 apache_getenv() example

The example above shows how to retrieve the value of the Apache environment variable SERVER_ADDR .

<?php
$ret = apache_getenv("SERVER_ADDR");
echo $ret;
?>

The above example will output something similar to:

42.24.42.240

See Also

  • apache_setenv() - Set an Apache subprocess_env variable
  • getenv() - Gets the value of an environment variable
  • Superglobals
Read article
PHP / apcu_enabled — DevDocs

apcu_enabled

(PECL apcu >= 4.0.3)

apcu_enabled Whether APCu is usable in the current environment

Description

apcu_enabled(): bool

Returns whether APCu is usable in the current environment.

Parameters

This function has no parameters.

Return Values

Returns true when APCu is usable in the current environment, false otherwise.

Read article
PHP / apcu_entry — DevDocs

apcu_entry

(PECL apcu >= 5.1.0)

apcu_entry Atomically fetch or generate a cache entry

Description

apcu_entry(string $key, callable $generator, int $ttl = 0): mixed

Atomically attempts to find key in the cache, if it cannot be found generator is called, passing key as the only argument. The return value of the call is then cached with the optionally specified ttl , and returned.

Note : When control enters apcu_entry() the lock for the cache is acquired exclusively, it is released when control leaves apcu_entry() : In effect, this turns the body of generator into a critical section, disallowing two processes from executing the same code paths concurrently. In addition, it prohibits the concurrent execution of any other APCu functions, since they will acquire the same lock.

Warning

The only APCu function that can be called safely by generator is apcu_entry() .

Parameters

key

Identity of cache entry

generator

A callable that accepts key as the only argument and returns the value to cache.

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.).

Return Values

Returns the cached value

Examples

Example #1 An apcu_entry() example

<?php
$config = apcu_entry("config", function($key) {
 return [
   "fruit" => apcu_entry("config.fruit", function($key){
     return [
       "apples",
       "pears"
     ];
   }), 
   "people" => apcu_entry("config.people", function($key){
     return [
      "bob",
      "joe",
      "niki"
     ];
   })
 ];
});

var_dump($config);
?>

The above example will output:

array(2) {
  ["fruit"]=>
  array(2) {
    [0]=>
    string(6) "apples"
    [1]=>
    string(5) "pears"
  }
  ["people"]=>
  array(3) {
    [0]=>
    string(3) "bob"
    [1]=>
    string(3) "joe"
    [2]=>
    string(4) "niki"
  }
}

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_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
Read article
PHP / apache_lookup_uri — DevDocs

apache_lookup_uri

(PHP 4, PHP 5, PHP 7, PHP 8)

apache_lookup_uri Perform a partial request for the specified URI and return all info about it

Description

apache_lookup_uri(string $filename): object|false

This performs a partial request for a URI. It goes just far enough to obtain all the important information about the given resource.

This function is supported when PHP is installed as an Apache module webserver.

Parameters

filename

The filename (URI) that's being requested.

Return Values

An object of related URI information. The properties of this object are:

  • status
  • the_request
  • status_line
  • method
  • content_type
  • handler
  • uri
  • filename
  • path_info
  • args
  • boundary
  • no_cache
  • no_local_copy
  • allowed
  • send_bodyct
  • bytes_sent
  • byterange
  • clength
  • unparsed_uri
  • mtime
  • request_time

Returns false on failure.

Examples

Example #1 apache_lookup_uri() example

<?php
$info = apache_lookup_uri('index.php?var=value');
print_r($info);

if (file_exists($info->filename)) {
    echo 'file exists!';
}
?>

The above example will output something similar to:

stdClass Object
(
    [status] => 200
    [the_request] => GET /dir/file.php HTTP/1.1
    [method] => GET
    [mtime] => 0
    [clength] => 0
    [chunked] => 0
    [content_type] => application/x-httpd-php
    [no_cache] => 0
    [no_local_copy] => 1
    [unparsed_uri] => /dir/index.php?var=value
    [uri] => /dir/index.php
    [filename] => /home/htdocs/dir/index.php
    [args] => var=value
    [allowed] => 0
    [sent_bodyct] => 0
    [bytes_sent] => 0
    [request_time] => 1074282764
)
file exists!
Read article