Zend Framework 101: Zend_Loader
Enabling and Disabling the Auto Loader
In order to enable the auto-loader, use the
Zend_Loader::RegisterAutoload() static method. This method optionally accepts two arguments: the name of the auto-loader class, and whether to enable or disable the auto-loader.
By default the Zend_Loader class is used as the first argument, but you can use your own class if you desire. If you do, you must ensure your class defines a public static method called
autoload(). This method accepts a single argument, which is the name of the class to load. An example of this is shown later in this article.
Listing 1 shows how to enable the autoloader. Note that following this you can use any class you like without needing to call require_once(). Note that you must initially include the
Zend_Loader class for this to work!
require_once('Zend/Loader.php'); Zend_Loader::registerAutoload(); $myFooBar = new Foo_Bar();
In this example, the
Foo_Bar class would be defined by the file
Foo/Bar.php in your include path.
To disable the auto-loader, you pass
false as the second argument to
registerAutoload(). Note that you must also explicitly specify the class name in order to achieve this, which wasn't required when we enabled it.
Listing 2 demonstrates disabling the auto-loader. Note that after the auto-loader is disabled you must manually include class files as required.
// assume the auto-loader has already been enabled prior Zend_Loader::registerAutoload('Zend_Loader', false); require_once('Foo/Other.php'); $myFooOther = new Foo_Other();