(PHP 4, PHP 5)
dl — Loads a PHP extension at runtime
$library
)
Loads the PHP extension given by the parameter
library.
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()).
This function has been removed from some SAPIs in PHP 5.3.
library
This 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.
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\ (PHP 4) or C:\php5\ (PHP 5) by default.
Unix - If not explicitly set in the php.ini, the default extension directory depends on
Zwraca TRUE w przypadku powodzenia, FALSE w
przypadku błędu. If the functionality of loading modules is not available
or has been disabled (either by setting
enable_dl off 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.
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);
}
?>
| Wersja | Opis |
|---|---|
| 5.3.0 | dl() is now disabled in some SAPIs due to stability issues. The only SAPIs that allow dl() are CLI and Embed. Use the Extension Loading Directives instead. |
Informacja:
dl() is not supported when PHP is built with ZTS support. Use the Extension Loading Directives instead.
Informacja:
dl() is case sensitive on Unix platforms.
Informacja: Ta funkcja jest niedostępna jeśli PHP działa w trybie bezpiecznym