@ -380,10 +380,55 @@ Example:
Autoload mapping for a PHP autoloader.
Currently [`PSR-0` ](https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-0.md )
autoloading, `classmap` generation and `files` are supported. PSR-0 is the recommended way though
since it offers greater flexibility (no need to regenerate the autoloader when you add
classes).
Currently [`PSR-0` ](http://www.php-fig.org/psr/psr-0/ ) autoloading,
[`PSR-4` ](http://www.php-fig.org/psr/psr-4/ ) autoloading, `classmap` generation and
`files` includes are supported. PSR-4 is the recommended way though since it offers
greater ease of use (no need to regenerate the autoloader when you add classes).
#### PSR-4
Under the `psr-4` key you define a mapping from namespaces to paths, relative to the
package root. When autoloading a class like `Foo\\Bar\\Baz` a namespace prefix
`Foo\\` pointing to a directory `src/` means that the autoloader will look for a
file named `src/Bar/Baz.php` and include it if present. Note that as opposed to
the older PSR-0 style, the prefix (`Foo\\`) is **not** present in the file path.
Namespace prefixes must end in `\\` to avoid conflicts between similar prefixes.
For example `Foo` would match classes in the `FooBar` namespace so the trailing
backslashes solve the problem: `Foo\\` and `FooBar\\` are distinct.
The PSR-4 references are all combined, during install/update, into a single
key => value array which may be found in the generated file
`vendor/composer/autoload_psr4.php` .
Example:
{
"autoload": {
"psr-4": {
"Monolog\\": "src/",
"Vendor\\Namespace\\": "",
}
}
}
If you need to search for a same prefix in multiple directories,
you can specify them as an array as such:
{
"autoload": {
"psr-4": { "Monolog\\": ["src/", "lib/"] }
}
}
If you want to have a fallback directory where any namespace will be looked for,
you can use an empty prefix like:
{
"autoload": {
"psr-4": { "": "src/" }
}
}
#### PSR-0
@ -438,10 +483,6 @@ use an empty prefix like:
}
}
#### PSR-4
Stub: Similar to PSR-0.
#### Classmap
The `classmap` references are all combined, during install/update, into a single
@ -450,7 +491,7 @@ key => value array which may be found in the generated file
classes in all `.php` and `.inc` files in the given directories/files.
You can use the classmap generation support to define autoloading for all libraries
that do not follow PSR-0. To configure this you specify all directories or files
that do not follow PSR-0/4 . To configure this you specify all directories or files
to search for classes.
Example:
@ -493,6 +534,10 @@ Optional.
### target-dir
> **DEPRECATED** : This is only present to support legacy PSR-0 style autoloading,
> and all new code should preferably use PSR-4 without target-dir and projects
> using PSR-0 with PHP namespaces are encouraged to migrate to PSR-4 instead.
Defines the installation target.
In case the package root is below the namespace declaration you cannot
Jordi Boggiano
11 years ago