and let’s assume the following content of Bar.php:
// Bar.phpnamespaceOtherDir;useSomeDir\Foo;// This now conflicts the class OtherDir\Foo
If both files OtherDir/Foo.php and SomeDir/Foo.php are loaded in the
same runtime, you will see a PHP error such as the following:
PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.php
However, as OtherDir/Foo.php does not necessarily have to be loaded and the
error is only triggered if it is loaded before OtherDir/Bar.php, this problem
might go unnoticed for a while. In order to prevent this error from surfacing,
you must import the namespace with a different alias:
// Bar.phpnamespaceOtherDir;useSomeDir\FooasSomeDirFoo;// There is no conflict anymore.
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18
19
/**
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* Get the URL for the current (or specified) site
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*
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* @return string
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* @since 1.8.0
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*/
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function elgg_get_site_url() {
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220
return _elgg_services()->config->wwwroot;
27
}
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/**
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* Get the plugin path for this installation
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*
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* @return string
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* @since 1.8.0
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*/
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function elgg_get_plugins_path() {
36
return _elgg_services()->config->pluginspath;
37
}
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/**
40
* Get the data directory path for this installation
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*
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* @return string
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* @since 1.8.0
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*/
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function elgg_get_data_path() {
46
return _elgg_services()->config->getDataPath();
47
}
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/**
50
* Get the cache directory path for this installation.
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*
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* If not set in settings.php, the data path will be returned.
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*
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* @return string
55
*/
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function elgg_get_cache_path() {
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1
return _elgg_services()->config->getCachePath();
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}
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/**
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* Get the root directory path for this installation
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*
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* Note: This is not the same as the Elgg root! In the Elgg 1.x series, Elgg
64
* was always at the install root, but as of 2.0, Elgg can be installed as a
65
* composer dependency, so you cannot assume that it the install root anymore.
66
*
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* @return string
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* @since 1.8.0
69
*/
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function elgg_get_root_path() {
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1
return _elgg_services()->config->get('path');
72
}
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/**
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* /path/to/elgg/engine
76
*
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* No trailing slash
78
*
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* @return string
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*/
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function elgg_get_engine_path() {
82
return dirname(__DIR__);
83
}
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/**
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* Get an Elgg configuration value
87
*
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* @param string $name Name of the configuration value
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*
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* @return mixed Configuration value or null if it does not exist
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* @since 1.8.0
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*/
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function elgg_get_config($name) {
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340
if ($name == 'icon_sizes') {
95
$msg = 'The config value "icon_sizes" is deprecated. Use elgg_get_icon_sizes()';
96
elgg_deprecated_notice($msg, '2.2');
97
}
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340
return _elgg_config()->$name;
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}
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/**
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* Set an Elgg configuration value
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*
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* @warning This does not persist the configuration setting. Use elgg_save_config()
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*
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* @param string $name Name of the configuration value
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* @param mixed $value Value
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*
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* @return void
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* @since 1.8.0
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*/
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function elgg_set_config($name, $value) {
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14
_elgg_config()->$name = $value;
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14
}
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/**
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* Save a configuration setting
119
*
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* @param string $name Configuration name (cannot be greater than 255 characters)
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* @param mixed $value Configuration value. Should be string for installation setting
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*
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* @return bool
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* @since 1.8.0
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*/
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function elgg_save_config($name, $value) {
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return _elgg_config()->save($name, $value);
128
}
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/**
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* Removes a config setting.
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*
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* @param string $name The name of the field.
134
*
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* @return bool Success or failure
136
*/
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function elgg_remove_config($name) {
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return _elgg_config()->remove($name);
139
}
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/**
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* @access private
143
*/
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function _elgg_config_test($hook, $type, $tests) {
Elgg /
Elgg
Evan Winslow
Let’s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let’s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: