(PHP 5, PHP 7, PHP 8)
ReflectionClass::__construct — Constructs a ReflectionClass
Constructs a new ReflectionClass object.
Throws ReflectionException if the class to reflect does not exist.
Приклад #1 Basic usage ReflectionClass
<?php
$reflection = new ReflectionClass('Exception');
echo $reflection;
?>Поданий вище приклад виведе щось схоже на:
Class [ <internal:Core> class Exception implements Stringable, Throwable ] {
- Constants [0] {
}
- Static properties [0] {
}
- Static methods [0] {
}
- Properties [7] {
Property [ protected $message = '' ]
Property [ private string $string = '' ]
Property [ protected $code = 0 ]
Property [ protected string $file = '' ]
Property [ protected int $line = 0 ]
Property [ private array $trace = [] ]
Property [ private ?Throwable $previous = NULL ]
}
- Methods [11] {
Method [ <internal:Core> private method __clone ] {
- Parameters [0] {
}
- Return [ void ]
}
Method [ <internal:Core, ctor> public method __construct ] {
- Parameters [3] {
Parameter #0 [ <optional> string $message = "" ]
Parameter #1 [ <optional> int $code = 0 ]
Parameter #2 [ <optional> ?Throwable $previous = null ]
}
}
Method [ <internal:Core> public method __wakeup ] {
- Parameters [0] {
}
- Tentative return [ void ]
}
Method [ <internal:Core, prototype Throwable> final public method getMessage ] {
- Parameters [0] {
}
- Return [ string ]
}
Method [ <internal:Core, prototype Throwable> final public method getCode ] {
- Parameters [0] {
}
}
Method [ <internal:Core, prototype Throwable> final public method getFile ] {
- Parameters [0] {
}
- Return [ string ]
}
Method [ <internal:Core, prototype Throwable> final public method getLine ] {
- Parameters [0] {
}
- Return [ int ]
}
Method [ <internal:Core, prototype Throwable> final public method getTrace ] {
- Parameters [0] {
}
- Return [ array ]
}
Method [ <internal:Core, prototype Throwable> final public method getPrevious ] {
- Parameters [0] {
}
- Return [ ?Throwable ]
}
Method [ <internal:Core, prototype Throwable> final public method getTraceAsString ] {
- Parameters [0] {
}
- Return [ string ]
}
Method [ <internal:Core, prototype Stringable> public method __toString ] {
- Parameters [0] {
}
- Return [ string ]
}
}
}
To reflect on a namespaced class in PHP 5.3, you must always specify the fully qualified name of the class - even if you've aliased the containing namespace using a "use" statement.
So instead of:
<?php
use App\Core as Core;
$oReflectionClass = new ReflectionClass('Core\Singleton');
?>
You would type:
<?php
use App\Core as Core;
$oReflectionClass = new ReflectionClass('App\Core\Singleton');
?>Example of usage:
public static function getClassData($class)
{
// Trying to create a new object of ReflectionClass class
$class = new ReflectionClass($class);
$details = sprintf('%s - %s%s%s%s%s%s%s%s',
$class->getName(),
$class->isInternal() ? 'internal class,' : 'user-defined class,',
$class->isTrait() ? ' is trait,' : '',
$class->isInterface() ? ' is interface,' : '',
$class->isAbstract() ? ' is abstract,' : '',
$class->isFinal() ? ' is final,' : '',
$class->isCloneable() ? ' is cloneable,' : '',
$class->isInstantiable() ? ' is instantiable,' : '',
$class->isIterateable() ? ' is iterable : ''
);
return '<pre class="debug">' . rtrim($details, ',') . '</pre>';
}Running the following code on Windows Vista (I know, I know), PHP 5.3.9, the ReflectionClass constructor actually throws a ReflectionException when the desired class cannot be instantiated:
<?php
try {
$ReflectedClass = new ReflectionClass('NonExist');
} catch (LogicException $Exception) {
die('Not gonna make it in here...');
} catch (ReflectionException $Exception) {
die('Your class does not exist!');
}
?>It's very useful to know that you can also use the ReflectionClass to inspect interfaces, even thouth Interfaces are not classes. Example:
<?php
interface Edible
{
public function eat();
}
$refl = new ReflectionClass("Edible");
$methods = $refl->getMethods();
?>
[Edit by danbrown AT php DOT net - Contains a bugfix by (dbl AT bnet DOT com) on 18-AUG-2010 with the following message: "underline had to be removed for it to work ( new Reflection_Class -> new ReflectionClass )"]Useful to know that if you pass a string into the construct and the class cannot be instantiated for some reason a SPL LogicException will be thrown.
This code was ran on a Mac OS X 10.6.7, AMP, PHP 5.3+
<?php
// index.php
try {
$ReflectedClass = new ReflectionClass('NonExist');
} catch (LogicException $logicDuh) {
print_r($logicDuh);
}
?>
Will return a deeply nested array full of useful information about the error.