ReflectionClass::__construct

(PHP 5, PHP 7)

ReflectionClass::__constructConstructs a ReflectionClass

Descrierea

public ReflectionClass::__construct ( object|string $objectOrClass )

Constructs a new ReflectionClass object.

Parametri

objectOrClass

Either a string containing the name of the class to reflect, or an object.

Valorile întoarse

Returns constructed ReflectionClass instance.

Erori/Excepții

Throws ReflectionException if the class to reflect does not exist.

Exemple

Example #1 Basic usage ReflectionClass

<?php
Reflection
::export(new ReflectionClass('Exception'));
?>

Exemplul de mai sus va afișa ceva similar cu:

Class [ <internal:Core> class Exception ] {

  - Constants [0] {
  }

  - Static properties [0] {
  }

  - Static methods [0] {
  }

  - Properties [7] {
    Property [ <default> protected $message ]
    Property [ <default> private $string ]
    Property [ <default> protected $code ]
    Property [ <default> protected $file ]
    Property [ <default> protected $line ]
    Property [ <default> private $trace ]
    Property [ <default> private $previous ]
  }

  - Methods [10] {
    Method [ <internal:Core> final private method __clone ] {
    }

    Method [ <internal:Core, ctor> public method __construct ] {

      - Parameters [3] {
        Parameter #0 [ <optional> $message ]
        Parameter #1 [ <optional> $code ]
        Parameter #2 [ <optional> $previous ]
      }
    }

    Method [ <internal:Core> final public method getMessage ] {
    }

    Method [ <internal:Core> final public method getCode ] {
    }

    Method [ <internal:Core> final public method getFile ] {
    }

    Method [ <internal:Core> final public method getLine ] {
    }

    Method [ <internal:Core> final public method getTrace ] {
    }

    Method [ <internal:Core> final public method getPrevious ] {
    }

    Method [ <internal:Core> final public method getTraceAsString ] {
    }

    Method [ <internal:Core> public method __toString ] {
    }
  }
}

A se vedea și

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User Contributed Notes 6 notes

up
8
danbettles at yahoo dot co dot uk
8 years ago
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');
?>
up
3
me [at] klay [dot] me
10 years ago
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>';
    }
up
4
gafisher at griasolutions dot com
12 years ago
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!');
    }
?>
up
1
ivo at jansch dot nl
14 years ago
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 )"]
up
0
cspray at gmail dot com
12 years ago
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.
up
-2
nulled
10 years ago
if (is_file($classfile))
            require_once $classfile;

if (! class_exists($classname, false))
            exit('ERROR: ' . $classname . ' is not defined as a Class');

The above code is useful to tell if the class was defined.  You could also use another commentors method using Try Catch Exceptions.  But, if you do not use try blocks much, the above function based method works just fine.

From there, you can than call:

$class = new ReflectionClass($classname);

        if (! $class->isSubclassOf('PanelCommon'))
            exit("ERROR: {$classname} must extends PanelCommon");

        if (! $class->isUserDefined())
            exit("ERROR: {$classname} must be user defined and not internal to PHP");

        if (! $class->IsInstantiable())
            exit("ERROR: {$classname} must be IsInstantiable and not an Interface or Abstract class");

        if (! $class->hasMethod('home'))
            exit("ERROR: {$classname} lacks required method/function home()");

Forforth and so on.
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