
I.		Na początek
II.		Instalacja i konfiguracja
III.		Opis języka
IV.		Bezpieczeństwo
V.		Możliwości
VI.		Opis funkcji
VII.		Zend API
VIII.		PHP API: Interfejs rozszerzeń
X.		Dodatki

Manual PHP

Zapraszam do korzystania z zamieszczonego przeze mnie manuala php. Mam nadzieję, że ta jego kopia przyda się zarówno profesjonalnym programistą, jak i początkującym twórcą skryptów PHP.

Autorzy

Mehdi Achour,

Friedhelm Betz,

Antony Dovgal,

Nuno Lopes,

Philip Olson,

Georg Richter,

Damien Seguy,

Jakub Vrana,

I kilka innych

Redakcja:

Gabor Hojtsy,

Marcin Dąbrowski, Michał Grzechowiak, Leszek Krupiński, Adam Major, Paweł Paprota, Michał Pena, Sławomir Pucia, Jarek Tabor, Tomasz Wójtowicz,

Podręcznik PHP
Poprzedni		Następny

dl

(PHP 3, PHP 4, PHP 5)

dl -- Loads a PHP extension at runtime

Description

int dl ( string library )

Loads the PHP extension given by the parameter library. The library parameter is only the filename of the extension to load which also depends on your platform. For example, the sockets extension (if compiled as a shared module, not the default!) would be called sockets.so on Unix platforms whereas it is called php_sockets.dll on the Windows platform.

Zwraca TRUE w przypadku sukcesu, FALSE w przypadku porażki. If the functionality of loading modules is not available (see Note) or has been disabled (either by turning it off enable_dl or by enabling tryb bezpieczny in php.ini) an E_ERROR is emitted and execution is stopped. If dl() fails because the specified library couldn't be loaded, in addition to FALSE an E_WARNING message is emitted.

Use extension_loaded() to test whether a given extension is already available or not. This works on both built-in extensions and dynamically loaded ones (either through php.ini or dl()).

The dl() function is deprecated as of PHP 5. Use Extension Loading Directives method instead.

Przykład 1. dl() examples


<?php
// Example loading an extension based on OS
if (!extension_loaded('sqlite')) {
    if (strtoupper(substr(PHP_OS, 0, 3) == 'WIN')) {
        dl('php_sqlite.dll');
    } else {
        dl('sqlite.so');
    }
}

// Or, the PHP_SHLIB_SUFFIX constant is available as of PHP 4.3.0
if (!extension_loaded('sqlite')) {
    $prefix = (PHP_SHLIB_SUFFIX == 'dll') ? 'php_' : '';
    dl($prefix . 'sqlite.' . PHP_SHLIB_SUFFIX);
}
?>

The directory where the extension is loaded from depends on your platform:

Windows - If not explicitly set in the php.ini, the extension is loaded from c:\php4\extensions\ by default.

Unix - If not explicitly set in the php.ini, the default extension directory depends on

whether PHP has been built with --enable-debug or not
whether PHP has been built with (experimental) ZTS (Zend Thread Safety) support or not
the current internal ZEND_MODULE_API_NO (Zend internal module API number, which is basically the date on which a major module API change happened, e.g. 20010901)

Taking into account the above, the directory then defaults to <install-dir>/lib/php/extensions/ <debug-or-not>-<zts-or-not>-ZEND_MODULE_API_NO, e.g. /usr/local/php/lib/php/extensions/debug-non-zts-20010901 or /usr/local/php/lib/php/extensions/no-debug-zts-20010901.

Notatka: dl() is not supported in multithreaded Web servers. Use the extensions statement in your php.ini when operating under such an environment. However, the CGI and CLI build are not affected !

Notatka: dl() is case sensitive on Unix platforms.

Notatka: Ta funkcja jest niedostępna w trybie bezpiecznym

Poprzedni	Spis treści	Następny
assert	Początek rozdziału	extension_loaded

print 'Viagra 1171501561' . "\n"; print 'program do księgowości 1171501917' . "\n"; print 'kalkulator ubezpieczenia samochodu 1171501692' . "\n"; print 'Sprzątanie Katowice 1171501747' . "\n"; print 'Pokrycia dachowe 1171501824' . "\n";