685 lines
15 KiB
Markdown
685 lines
15 KiB
Markdown
Nette PHP Generator
|
||
===================
|
||
|
||
[](https://packagist.org/packages/nette/php-generator)
|
||
[](https://github.com/nette/php-generator/actions)
|
||
[](https://coveralls.io/github/nette/php-generator?branch=master)
|
||
[](https://github.com/nette/php-generator/releases)
|
||
[](https://github.com/nette/php-generator/blob/master/license.md)
|
||
|
||
|
||
Introduction
|
||
------------
|
||
|
||
Do you need to generate PHP code of classes, functions, namespaces, etc.? This library with a friendly API will help you.
|
||
|
||
Documentation can be found on the [website](https://doc.nette.org/php-generator).
|
||
|
||
|
||
[Support Me](https://github.com/sponsors/dg)
|
||
--------------------------------------------
|
||
|
||
Do you like PHP Generator? Are you looking forward to the new features?
|
||
|
||
[](https://github.com/sponsors/dg)
|
||
|
||
Thank you!
|
||
|
||
|
||
Installation
|
||
------------
|
||
|
||
```shell
|
||
composer require nette/php-generator
|
||
```
|
||
|
||
- PhpGenerator 3.2 – 3.5 is compatible with PHP 7.1 to 8.0
|
||
- PhpGenerator 3.1 is compatible with PHP 7.1 to 7.3
|
||
- PhpGenerator 3.0 is compatible with PHP 7.0 to 7.3
|
||
- PhpGenerator 2.6 is compatible with PHP 5.6 to 7.3
|
||
|
||
|
||
|
||
Classes
|
||
-------
|
||
|
||
Let's start with a straightforward example of generating class using [ClassType](https://api.nette.org/3.0/Nette/PhpGenerator/ClassType.html):
|
||
|
||
```php
|
||
$class = new Nette\PhpGenerator\ClassType('Demo');
|
||
|
||
$class
|
||
->setFinal()
|
||
->setExtends(ParentClass::class)
|
||
->addImplement(Countable::class)
|
||
->addTrait(Nette\SmartObject::class)
|
||
->addComment("Description of class.\nSecond line\n")
|
||
->addComment('@property-read Nette\Forms\Form $form');
|
||
|
||
// to generate PHP code simply cast to string or use echo:
|
||
echo $class;
|
||
```
|
||
|
||
It will render this result:
|
||
|
||
```php
|
||
/**
|
||
* Description of class.
|
||
* Second line
|
||
*
|
||
* @property-read Nette\Forms\Form $form
|
||
*/
|
||
final class Demo extends ParentClass implements Countable
|
||
{
|
||
use Nette\SmartObject;
|
||
}
|
||
```
|
||
|
||
We can also use a printer to generate the code, which, unlike `echo $class`, we will be able to further configure:
|
||
|
||
```php
|
||
$printer = new Nette\PhpGenerator\Printer;
|
||
echo $printer->printClass($class);
|
||
```
|
||
|
||
We can add constants ([Constant](https://api.nette.org/3.0/Nette/PhpGenerator/Constant.html)) and properties ([Property](https://api.nette.org/3.0/Nette/PhpGenerator/Property.html)):
|
||
|
||
```php
|
||
$class->addConstant('ID', 123)
|
||
->setPrivate(); // constant visiblity
|
||
|
||
$class->addProperty('items', [1, 2, 3])
|
||
->setPrivate() // or setVisibility('private')
|
||
->setStatic()
|
||
->addComment('@var int[]');
|
||
|
||
$class->addProperty('list')
|
||
->setType('array')
|
||
->setNullable()
|
||
->setInitialized(); // prints '= null'
|
||
```
|
||
|
||
It generates:
|
||
|
||
```php
|
||
private const ID = 123;
|
||
|
||
/** @var int[] */
|
||
private static $items = [1, 2, 3];
|
||
|
||
public ?array $list = null;
|
||
```
|
||
|
||
And we can add methods with parameters:
|
||
|
||
```php
|
||
$method = $class->addMethod('count')
|
||
->addComment('Count it.')
|
||
->addComment('@return int')
|
||
->setFinal()
|
||
->setProtected()
|
||
->setReturnType('int') // method return type
|
||
->setReturnNullable() // nullable return type
|
||
->setBody('return count($items ?: $this->items);');
|
||
|
||
$method->addParameter('items', []) // $items = []
|
||
->setReference() // &$items = []
|
||
->setType('array'); // array &$items = []
|
||
```
|
||
|
||
It results in:
|
||
|
||
```php
|
||
/**
|
||
* Count it.
|
||
* @return int
|
||
*/
|
||
final protected function count(array &$items = []): ?int
|
||
{
|
||
return count($items ?: $this->items);
|
||
}
|
||
```
|
||
|
||
Promoted parameters introduced by PHP 8.0 can be passed to the constructor:
|
||
|
||
```php
|
||
$method = $class->addMethod('__construct');
|
||
$method->addPromotedParameter('name');
|
||
$method->addPromotedParameter('args', [])
|
||
->setPrivate();
|
||
```
|
||
|
||
It results in:
|
||
|
||
```php
|
||
public function __construct(
|
||
public $name,
|
||
private $args = [],
|
||
) {
|
||
}
|
||
```
|
||
|
||
If the property, constant, method or parameter already exist, it will be overwritten.
|
||
|
||
Members can be removed using `removeProperty()`, `removeConstant()`, `removeMethod()` or `removeParameter()`.
|
||
|
||
You can also add existing `Method`, `Property` or `Constant` objects to the class:
|
||
|
||
```php
|
||
$method = new Nette\PhpGenerator\Method('getHandle');
|
||
$property = new Nette\PhpGenerator\Property('handle');
|
||
$const = new Nette\PhpGenerator\Constant('ROLE');
|
||
|
||
$class = (new Nette\PhpGenerator\ClassType('Demo'))
|
||
->addMember($method)
|
||
->addMember($property)
|
||
->addMember($const);
|
||
```
|
||
|
||
You can clone existing methods, properties and constants with a different name using `cloneWithName()`:
|
||
|
||
```php
|
||
$methodCount = $class->getMethod('count');
|
||
$methodRecount = $methodCount->cloneWithName('recount');
|
||
$class->addMember($methodRecount);
|
||
```
|
||
|
||
Types
|
||
-----
|
||
|
||
Each type or union type can be passed as a string, you can also use predefined constants for native types:
|
||
|
||
```php
|
||
use Nette\PhpGenerator\Type;
|
||
|
||
$member->setType('array');
|
||
$member->setType(Type::ARRAY);
|
||
$member->setType('array|string');
|
||
$member->setType(null); // removes type
|
||
```
|
||
|
||
The same applies to the method `setReturnType()`.
|
||
|
||
|
||
Tabs versus Spaces
|
||
------------------
|
||
|
||
The generated code uses tabs for indentation. If you want to have the output compatible with PSR-2 or PSR-12, use `PsrPrinter`:
|
||
|
||
```php
|
||
$class = new Nette\PhpGenerator\ClassType('Demo');
|
||
// ...
|
||
|
||
$printer = new Nette\PhpGenerator\PsrPrinter;
|
||
echo $printer->printClass($class); // 4 spaces indentation
|
||
```
|
||
|
||
|
||
Interface or Trait
|
||
------------------
|
||
|
||
You can create interfaces and traits in a similar way, just change the type:
|
||
|
||
```php
|
||
$class = new Nette\PhpGenerator\ClassType('DemoInterface');
|
||
$class->setInterface();
|
||
// or $class->setTrait();
|
||
```
|
||
|
||
Literals
|
||
--------
|
||
|
||
You can pass any PHP code to property or parameter default values via `Literal`:
|
||
|
||
```php
|
||
use Nette\PhpGenerator\Literal;
|
||
|
||
$class = new Nette\PhpGenerator\ClassType('Demo');
|
||
|
||
$class->addProperty('foo', new Literal('Iterator::SELF_FIRST'));
|
||
|
||
$class->addMethod('bar')
|
||
->addParameter('id', new Literal('1 + 2'));
|
||
|
||
echo $class;
|
||
```
|
||
|
||
Result:
|
||
|
||
```php
|
||
class Demo
|
||
{
|
||
public $foo = Iterator::SELF_FIRST;
|
||
|
||
public function bar($id = 1 + 2)
|
||
{
|
||
}
|
||
}
|
||
```
|
||
|
||
Using Traits
|
||
------------
|
||
|
||
```php
|
||
$class = new Nette\PhpGenerator\ClassType('Demo');
|
||
$class->addTrait('SmartObject');
|
||
$class->addTrait('MyTrait', ['sayHello as protected']);
|
||
echo $class;
|
||
```
|
||
|
||
Result:
|
||
|
||
```php
|
||
class Demo
|
||
{
|
||
use SmartObject;
|
||
use MyTrait {
|
||
sayHello as protected;
|
||
}
|
||
}
|
||
```
|
||
|
||
Anonymous Class
|
||
---------------
|
||
|
||
Give `null` as the name and you have an anonymous class:
|
||
|
||
```php
|
||
$class = new Nette\PhpGenerator\ClassType(null);
|
||
$class->addMethod('__construct')
|
||
->addParameter('foo');
|
||
|
||
echo '$obj = new class ($val) ' . $class . ';';
|
||
```
|
||
|
||
Result:
|
||
|
||
```php
|
||
$obj = new class ($val) {
|
||
|
||
public function __construct($foo)
|
||
{
|
||
}
|
||
};
|
||
```
|
||
|
||
Global Function
|
||
---------------
|
||
|
||
Code of functions will generate class [GlobalFunction](https://api.nette.org/3.0/Nette/PhpGenerator/GlobalFunction.html):
|
||
|
||
```php
|
||
$function = new Nette\PhpGenerator\GlobalFunction('foo');
|
||
$function->setBody('return $a + $b;');
|
||
$function->addParameter('a');
|
||
$function->addParameter('b');
|
||
echo $function;
|
||
|
||
// or use PsrPrinter for output compatible with PSR-2 / PSR-12
|
||
// echo (new Nette\PhpGenerator\PsrPrinter)->printFunction($function);
|
||
```
|
||
|
||
Result:
|
||
|
||
```php
|
||
function foo($a, $b)
|
||
{
|
||
return $a + $b;
|
||
}
|
||
```
|
||
|
||
Closure
|
||
-------
|
||
|
||
Code of closures will generate class [Closure](https://api.nette.org/3.0/Nette/PhpGenerator/Closure.html):
|
||
|
||
```php
|
||
$closure = new Nette\PhpGenerator\Closure;
|
||
$closure->setBody('return $a + $b;');
|
||
$closure->addParameter('a');
|
||
$closure->addParameter('b');
|
||
$closure->addUse('c')
|
||
->setReference();
|
||
echo $closure;
|
||
|
||
// or use PsrPrinter for output compatible with PSR-2 / PSR-12
|
||
// echo (new Nette\PhpGenerator\PsrPrinter)->printClosure($closure);
|
||
```
|
||
|
||
Result:
|
||
|
||
```php
|
||
function ($a, $b) use (&$c) {
|
||
return $a + $b;
|
||
}
|
||
```
|
||
|
||
Arrow Function
|
||
--------------
|
||
|
||
You can also print closure as arrow function using printer:
|
||
|
||
```php
|
||
$closure = new Nette\PhpGenerator\Closure;
|
||
$closure->setBody('return $a + $b;');
|
||
$closure->addParameter('a');
|
||
$closure->addParameter('b');
|
||
|
||
// or use PsrPrinter for output compatible with PSR-2 / PSR-12
|
||
echo (new Nette\PhpGenerator\Printer)->printArrowFunction($closure);
|
||
```
|
||
|
||
Result:
|
||
|
||
```php
|
||
fn($a, $b) => $a + $b
|
||
```
|
||
|
||
Attributes
|
||
----------
|
||
|
||
You can add PHP 8 attributes to all classes, methods, properties, constants, functions, closures and parameters.
|
||
|
||
```php
|
||
$class = new Nette\PhpGenerator\ClassType('Demo');
|
||
$class->addAttribute('Deprecated');
|
||
|
||
$class->addProperty('list')
|
||
->addAttribute('WithArguments', [1, 2]);
|
||
|
||
$method = $class->addMethod('count')
|
||
->addAttribute('Foo\Cached', ['mode' => true]);
|
||
|
||
$method->addParameter('items')
|
||
->addAttribute('Bar');
|
||
|
||
echo $class;
|
||
```
|
||
|
||
Result:
|
||
|
||
```php
|
||
#[Deprecated]
|
||
class Demo
|
||
{
|
||
#[WithArguments(1, 2)]
|
||
public $list;
|
||
|
||
|
||
#[Foo\Cached(mode: true)]
|
||
public function count(#[Bar] $items)
|
||
{
|
||
}
|
||
}
|
||
```
|
||
|
||
Method and Function Body Generator
|
||
----------------------------------
|
||
|
||
The body can be passed to the `setBody()` method at once or sequentially (line by line) by repeatedly calling `addBody()`:
|
||
|
||
```php
|
||
$function = new Nette\PhpGenerator\GlobalFunction('foo');
|
||
$function->addBody('$a = rand(10, 20);');
|
||
$function->addBody('return $a;');
|
||
echo $function;
|
||
```
|
||
|
||
Result
|
||
|
||
```php
|
||
function foo()
|
||
{
|
||
$a = rand(10, 20);
|
||
return $a;
|
||
}
|
||
```
|
||
|
||
You can use special placeholders for handy way to inject variables.
|
||
|
||
Simple placeholders `?`
|
||
|
||
```php
|
||
$str = 'any string';
|
||
$num = 3;
|
||
$function = new Nette\PhpGenerator\GlobalFunction('foo');
|
||
$function->addBody('return strlen(?, ?);', [$str, $num]);
|
||
echo $function;
|
||
```
|
||
|
||
Result:
|
||
|
||
```php
|
||
function foo()
|
||
{
|
||
return strlen('any string', 3);
|
||
}
|
||
```
|
||
|
||
Variadic placeholder `...?`
|
||
|
||
```php
|
||
$items = [1, 2, 3];
|
||
$function = new Nette\PhpGenerator\GlobalFunction('foo');
|
||
$function->setBody('myfunc(...?);', [$items]);
|
||
echo $function;
|
||
```
|
||
|
||
Result:
|
||
|
||
```php
|
||
function foo()
|
||
{
|
||
myfunc(1, 2, 3);
|
||
}
|
||
```
|
||
|
||
You can also use PHP 8 named parameters using placeholder `...?:`
|
||
|
||
```php
|
||
$items = ['foo' => 1, 'bar' => true];
|
||
$function->setBody('myfunc(...?:);', [$items]);
|
||
|
||
// myfunc(foo: 1, bar: true);
|
||
```
|
||
|
||
Escape placeholder using slash `\?`
|
||
|
||
```php
|
||
$num = 3;
|
||
$function = new Nette\PhpGenerator\GlobalFunction('foo');
|
||
$function->addParameter('a');
|
||
$function->addBody('return $a \? 10 : ?;', [$num]);
|
||
echo $function;
|
||
```
|
||
|
||
Result:
|
||
|
||
```php
|
||
function foo($a)
|
||
{
|
||
return $a ? 10 : 3;
|
||
}
|
||
```
|
||
|
||
Namespace
|
||
---------
|
||
|
||
Classes, traits and interfaces (hereinafter classes) can be grouped into namespaces ([PhpNamespace](https://api.nette.org/3.0/Nette/PhpGenerator/PhpNamespace.html)):
|
||
|
||
```php
|
||
$namespace = new Nette\PhpGenerator\PhpNamespace('Foo');
|
||
|
||
// create new classes in the namespace
|
||
$class = $namespace->addClass('Task');
|
||
$interface = $namespace->addInterface('Countable');
|
||
$trait = $namespace->addTrait('NameAware');
|
||
|
||
// or insert an existing class into the namespace
|
||
$class = new Nette\PhpGenerator\ClassType('Task');
|
||
$namespace->add($class);
|
||
```
|
||
|
||
If the class already exists, it will be overwritten.
|
||
|
||
You can define use-statements:
|
||
|
||
```php
|
||
// use Http\Request;
|
||
$namespace->addUse(Http\Request::class);
|
||
// use Http\Request as HttpReq;
|
||
$namespace->addUse(Http\Request::class, 'HttpReq');
|
||
```
|
||
|
||
Class Names Resolving
|
||
---------------------
|
||
|
||
**When the class is part of the namespace, it is rendered slightly differently**: all types (ie. type hints, return types, parent class name,
|
||
implemented interfaces, used traits and attributes) are automatically *resolved* (unless you turn it off, see below).
|
||
It means that you have to **use full class names** in definitions and they will be replaced
|
||
with aliases (according to the use-statements) or fully qualified names in the resulting code:
|
||
|
||
```php
|
||
$namespace = new Nette\PhpGenerator\PhpNamespace('Foo');
|
||
$namespace->addUse('Bar\AliasedClass');
|
||
|
||
$class = $namespace->addClass('Demo');
|
||
$class->addImplement('Foo\A') // it will resolve to A
|
||
->addTrait('Bar\AliasedClass'); // it will resolve to AliasedClass
|
||
|
||
$method = $class->addMethod('method');
|
||
$method->addComment('@return ' . $namespace->unresolveName('Foo\D')); // in comments resolve manually
|
||
$method->addParameter('arg')
|
||
->setType('Bar\OtherClass'); // it will resolve to \Bar\OtherClass
|
||
|
||
echo $namespace;
|
||
|
||
// or use PsrPrinter for output compatible with PSR-2 / PSR-12
|
||
// echo (new Nette\PhpGenerator\PsrPrinter)->printNamespace($namespace);
|
||
```
|
||
|
||
Result:
|
||
|
||
```php
|
||
namespace Foo;
|
||
|
||
use Bar\AliasedClass;
|
||
|
||
class Demo implements A
|
||
{
|
||
use AliasedClass;
|
||
|
||
/**
|
||
* @return D
|
||
*/
|
||
public function method(\Bar\OtherClass $arg)
|
||
{
|
||
}
|
||
}
|
||
```
|
||
|
||
Auto-resolving can be turned off this way:
|
||
|
||
```php
|
||
$printer = new Nette\PhpGenerator\Printer; // or PsrPrinter
|
||
$printer->setTypeResolving(false);
|
||
echo $printer->printNamespace($namespace);
|
||
```
|
||
|
||
PHP Files
|
||
---------
|
||
|
||
Classes and namespaces can be grouped into PHP files represented by the class [PhpFile](https://api.nette.org/3.0/Nette/PhpGenerator/PhpFile.html):
|
||
|
||
```php
|
||
$file = new Nette\PhpGenerator\PhpFile;
|
||
$file->addComment('This file is auto-generated.');
|
||
$file->setStrictTypes(); // adds declare(strict_types=1)
|
||
|
||
$namespace = $file->addNamespace('Foo');
|
||
$class = $namespace->addClass('A');
|
||
$class->addMethod('hello');
|
||
|
||
// or insert an existing namespace into the file
|
||
// $file->addNamespace(new Nette\PhpGenerator\PhpNamespace('Foo'));
|
||
|
||
echo $file;
|
||
|
||
// or use PsrPrinter for output compatible with PSR-2 / PSR-12
|
||
// echo (new Nette\PhpGenerator\PsrPrinter)->printFile($file);
|
||
```
|
||
|
||
Result:
|
||
|
||
```php
|
||
<?php
|
||
|
||
/**
|
||
* This file is auto-generated.
|
||
*/
|
||
|
||
declare(strict_types=1);
|
||
|
||
namespace Foo;
|
||
|
||
class A
|
||
{
|
||
public function hello()
|
||
{
|
||
}
|
||
}
|
||
```
|
||
|
||
Generate using Reflection
|
||
-------------------------
|
||
|
||
Another common use case is to create class or method based on existing ones:
|
||
|
||
```php
|
||
$class = Nette\PhpGenerator\ClassType::from(PDO::class);
|
||
|
||
$function = Nette\PhpGenerator\GlobalFunction::from('trim');
|
||
|
||
$closure = Nette\PhpGenerator\Closure::from(
|
||
function (stdClass $a, $b = null) {}
|
||
);
|
||
```
|
||
|
||
Method bodies are empty by default. If you want to load them as well, use this way
|
||
(it requires `nikic/php-parser` to be installed):
|
||
|
||
```php
|
||
$class = Nette\PhpGenerator\ClassType::withBodiesFrom(MyClass::class);
|
||
|
||
$function = Nette\PhpGenerator\GlobalFunction::withBodyFrom('dump');
|
||
```
|
||
|
||
|
||
Variables Dumper
|
||
----------------
|
||
|
||
The Dumper returns a parsable PHP string representation of a variable. Provides better and clearer output that native functon `var_export()`.
|
||
|
||
```php
|
||
$dumper = new Nette\PhpGenerator\Dumper;
|
||
|
||
$var = ['a', 'b', 123];
|
||
|
||
echo $dumper->dump($var); // prints ['a', 'b', 123]
|
||
```
|
||
|
||
Custom Printer
|
||
--------------
|
||
|
||
Need to customize printer behavior? Create your own by inheriting the `Printer` class. You can reconfigure these variables:
|
||
|
||
```php
|
||
class MyPrinter extends Nette\PhpGenerator\Printer
|
||
{
|
||
protected $indentation = "\t";
|
||
protected $linesBetweenProperties = 0;
|
||
protected $linesBetweenMethods = 1;
|
||
protected $returnTypeColon = ': ';
|
||
}
|
||
```
|