06-22-2009
Quote:
Originally Posted by
EddiRae
As for the dot ... That is what I need to be in my string. How would you do that?
He was talking about replacing "+" by ".". PHP uses dot for string concatenation, not +.
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DL(3) 1 DL(3)
dl - Loads a PHP extension at runtime
SYNOPSIS
bool dl (string $library)
DESCRIPTION
Loads the PHP extension given by the parameter $library.
Use extension_loaded(3) to test whether a given extension is already available or not. This works on both built-in extensions and dynami-
cally loaded ones (either through php.ini or dl(3)).
Warning
This function has been removed from some SAPIs in PHP 5.3.
PARAMETERS
o $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:php4extensions (PHP 4) or C:php5 (PHP 5) by default. Unix
- If not explicitly set in the php.ini, the default extension directory depends on
o whether PHP has been built with
--enable-debug or not
o whether PHP has been built with (experimental) ZTS (Zend Thread Safety) support or not
o the current internal
ZEND_MODULE_API_NO (Zend internal module API number, which is basically the date on which a major module API change hap-
pened, 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.
RETURN VALUES
Returns TRUE on success or FALSE on failure. If the functionality of loading modules is not available or has been disabled (either by set-
ting enable_dl off or by enabling safe mode in php.ini) an E_ERROR is emitted and execution is stopped. If dl(3) fails because the speci-
fied library couldn't be loaded, in addition to FALSE an E_WARNING message is emitted.
EXAMPLES
Example #1
dl(3) 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);
}
?>
CHANGELOG
+--------+---------------------------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+---------------------------------------------------+
| 5.3.0 | |
| | |
| | dl(3) is now disabled in some SAPIs due to sta- |
| | bility issues. The only SAPIs that allow dl(3) |
| | are CLI and Embed. Use the Extension Loading |
| | Directives instead. |
| | |
+--------+---------------------------------------------------+
NOTES
Note
dl(3) is not supported when PHP is built with ZTS support. Use the Extension Loading Directives instead.
Note
dl(3) is case sensitive on Unix platforms.
Note
This function is disabled when PHP is running in safe mode.
SEE ALSO
Extension Loading Directives, extension_loaded(3).
PHP Documentation Group DL(3)