Php ini set load extension

On Windows, you have two ways to load a PHP extension: either compile it into PHP, or load the DLL. Loading a pre-compiled extension is the easiest and preferred way.

To load an extension, you need to have it available as a «.dll» file on your system. All the extensions are automatically and periodically compiled by the PHP Group (see next section for the download).

To compile an extension into PHP, please refer to building from source documentation.

To compile a standalone extension (aka a DLL file), please refer to building from source documentation. If the DLL file is available neither with your PHP distribution nor in PECL, you may have to compile it before you can start using the extension.

Where to find an extension?

PHP extensions are usually called «php_*.dll» (where the star represents the name of the extension) and they are located under the «PHP\ext» folder.

PHP ships with the extensions most useful to the majority of developers. They are called «core» extensions.

However, if you need functionality not provided by any core extension, you may still be able to find one in » PECL. The PHP Extension Community Library (PECL) is a repository for PHP Extensions, providing a directory of all known extensions and hosting facilities for downloading and development of PHP extensions.

If you have developed an extension for your own uses, you might want to think about hosting it on PECL so that others with the same needs can benefit from your time. A nice side effect is that you give them a good chance to give you feedback, (hopefully) thanks, bug reports and even fixes/patches. Before you submit your extension for hosting on PECL, please read » PECL submit.

Which extension to download?

Different version numbers (at least the first two numbers should match)
Different thread safety settings
Different processor architecture (x86, x64, . )
Different debugging settings
etc.

You should keep in mind that your extension settings should match all the settings of the PHP executable you are using. The following PHP script will tell you all about your PHP settings:

Example #1 phpinfo() call

Or from the command line, run:

Источник

Php ini set load extension

dl — Loads a PHP extension at runtime

Description

Loads the PHP extension given by the parameter extension_filename .

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 is only available for the CLI and embed SAPI s, and the CGI SAPI when run from the command line.

Parameters

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:\php5\ by default.

whether PHP has been built with —enable-debug or not
whether PHP has been built with 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 )

Return Values

Returns true on success or false on failure. If the functionality of loading modules is not available or has been disabled (by setting enable_dl off 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.

Examples

Example #1 dl() examples

// 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 using PHP_SHLIB_SUFFIX constant
if (! extension_loaded ( ‘sqlite’ )) $prefix = ( PHP_SHLIB_SUFFIX === ‘dll’ ) ? ‘php_’ : » ;
dl ( $prefix . ‘sqlite.’ . PHP_SHLIB_SUFFIX );
>
?>

Notes

Note:

dl() is case sensitive on Unix platforms.

User Contributed Notes 4 notes

dl is awkward because the filename format is OS-dependent and because it can complain if the extension is already loaded. This wrapper function fixes that:

function load_lib ( $n , $f = null ) return extension_loaded ( $n ) or dl ((( PHP_SHLIB_SUFFIX === ‘dll’ ) ? ‘php_’ : » ) . ( $f ? $f : $n ) . ‘.’ . PHP_SHLIB_SUFFIX );
>

// ensure we have SSL and MySQL support
load_lib ( ‘openssl’ );
load_lib ( ‘mysql’ );

// a rare few extensions have a different filename to their extension name, such as the image (gd) library, so we specify them like this:
load_lib ( ‘gd’ , ‘gd2’ );

function dl_local ( $extensionFile ) //make sure that we are ABLE to load libraries
if( !(bool) ini_get ( «enable_dl» ) || (bool) ini_get ( «safe_mode» ) ) die( «dh_local(): Loading extensions is not permitted.\n» );
>

//check to make sure the file exists
if( ! file_exists ( $extensionFile ) ) die( «dl_local(): File ‘ $extensionFile ‘ does not exist.\n» );
>

//check the file permissions
if( ! is_executable ( $extensionFile ) ) die( «dl_local(): File ‘ $extensionFile ‘ is not executable.\n» );
>

//we figure out the path
$currentDir = getcwd () . «/» ;
$currentExtPath = ini_get ( «extension_dir» );
$subDirs = preg_match_all ( «/\//» , $currentExtPath , $matches );
unset( $matches );

//lets make sure we extracted a valid extension path
if( !(bool) $subDirs ) die( «dl_local(): Could not determine a valid extension path [extension_dir].\n» );
>

$extPathLastChar = strlen ( $currentExtPath ) — 1 ;

if( $extPathLastChar == strrpos ( $currentExtPath , «/» ) ) $subDirs —;
>

//construct the final path to load
$finalExtPath = $backDirStr . $currentDir . $extensionFile ;

//now we execute dl() to actually load the module
if( ! dl ( $finalExtPath ) ) die();
>

//if the module was loaded correctly, we must bow grab the module name
$loadedExtensions = get_loaded_extensions ();
$thisExtName = $loadedExtensions [ sizeof ( $loadedExtensions ) — 1 ];

//lastly, we return the extension name
return $thisExtName ;

Like with eval(), the only correct way to use dl() is to not use it.
Test if a function(s) you intend to use are available.
If not, complain to the user or implement a workaround.
Not to mention dl() issues in a multithreading environment.

If you need to load an extension from the CURRENT local directory because you do not have privelages to place the extension in your servers PHP extensions directory, this function i wrote may be of use to you

/*
Function: dl_local()
Reference: http://us2.php.net/manual/en/function.dl.php
Author: Brendon Crawford
Usage: dl_local( «mylib.so» );
Returns: Extension Name (NOT the extension filename however)
NOTE:
This function can be used when you need to load a PHP extension (module,shared object,etc..),
but you do not have sufficient privelages to place the extension in the proper directory where it can be loaded. This function
will load the extension from the CURRENT WORKING DIRECTORY only.
If you need to see which functions are available within a certain extension,
use «get_extension_funcs()». Documentation for this can be found at
«http://us2.php.net/manual/en/function.get-extension-funcs.php».
*/

function dl_local ( $extensionFile ) <
//make sure that we are ABLE to load libraries
if( !(bool) ini_get ( «enable_dl» ) || (bool) ini_get ( «safe_mode» ) ) <
die( «dh_local(): Loading extensions is not permitted.\n» );
>

//check to make sure the file exists
if( ! file_exists ( $extensionFile ) ) <
die( «dl_local(): File ‘ $extensionFile ‘ does not exist.\n» );
>

//check the file permissions
if( ! is_executable ( $extensionFile ) ) <
die( «dl_local(): File ‘ $extensionFile ‘ is not executable.\n» );
>

//we figure out the path
$currentDir = getcwd () . «/» ;
$currentExtPath = ini_get ( «extension_dir» );
$subDirs = preg_match_all ( «/\//» , $currentExtPath , $matches );
unset( $matches );

//lets make sure we extracted a valid extension path
if( !(bool) $subDirs ) <
die( «dl_local(): Could not determine a valid extension path [extension_dir].\n» );
>

$extPathLastChar = strlen ( $currentExtPath ) — 1 ;

if( $extPathLastChar == strrpos ( $currentExtPath , «/» ) ) <
$subDirs —;
>

//construct the final path to load
$finalExtPath = $backDirStr . $currentDir . $extensionFile ;

//now we execute dl() to actually load the module
if( ! dl ( $finalExtPath ) ) <
die();
>

//if the module was loaded correctly, we must bow grab the module name
$loadedExtensions = get_loaded_extensions ();
$thisExtName = $loadedExtensions [ sizeof ( $loadedExtensions ) — 1 ];

//lastly, we return the extension name
return $thisExtName ;

PHP Options/Info Functions
- assert_options
- assert
- cli_get_process_title
- cli_set_process_title
- dl
- extension_loaded
- gc_collect_cycles
- gc_disable
- gc_enable
- gc_enabled
- gc_mem_caches
- gc_status
- get_cfg_var
- get_current_user
- get_defined_constants
- get_extension_funcs
- get_include_path
- get_included_files
- get_loaded_extensions
- get_required_files
- get_resources
- getenv
- getlastmod
- getmygid
- getmyinode
- getmypid
- getmyuid
- getopt
- getrusage
- ini_alter
- ini_get_all
- ini_get
- ini_parse_quantity
- ini_restore
- ini_set
- memory_get_peak_usage
- memory_get_usage
- memory_reset_peak_usage
- php_ini_loaded_file
- php_ini_scanned_files
- php_sapi_name
- php_uname
- phpcredits
- phpinfo
- phpversion
- putenv
- set_include_path
- set_time_limit
- sys_get_temp_dir
- version_compare
- zend_thread_id
- zend_version
- get_magic_quotes_gpc
- get_magic_quotes_runtime
- restore_include_path
Источник

Php ini set load extension

Php ini set load extension

Where to find an extension?

Which extension to download?

Php ini set load extension

Description

Parameters

Return Values

Examples

Notes

See Also

User Contributed Notes 4 notes