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ReflectionClass::getConstant

(PHP 5, PHP 7)

ReflectionClass::getConstantGets defined constant

Beschreibung

public ReflectionClass::getConstant ( string $name ) : mixed

Gets the defined constant.

Warnung

Diese Funktion ist bis jetzt nicht dokumentiert. Es steht nur die Liste der Argumente zur Verf├╝gung.

Parameter-Liste

name

The name of the class constant to get.

R├╝ckgabewerte

Value of the constant with the name name. Returns FALSE if the constant was not found in the class.

Beispiele

Beispiel #1 Usage of ReflectionClass::getConstant()

<?php

class Example {
    const 
C1 false;
    const 
C2 'I am a constant';
}

$reflection = new ReflectionClass('Example');

var_dump($reflection->getConstant('C1'));
var_dump($reflection->getConstant('C2'));
var_dump($reflection->getConstant('C3'));
?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

bool(false)
string(15) "I am a constant"
bool(false)

Siehe auch

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User Contributed Notes 2 notes

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4
aurelien dot tisserand at wavesoftware dot ch
6 years ago
If the $name constant doesn't exist in the targetted class the function returns bool(false), not empty nor null but false (you to test with "==="

$constFounded = false ;
$this->currentlangClass = new ReflectionClass($langFile);
$this->currentlangClass->getConstant($constant);
if($myConst !== false){
              $constFounded = true ;
}
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2
Bhimsen
7 years ago
The "getconstant" method can be used to get the value associated with a constant
of a particular class that you are examining.
The following code snippet shows this:

<?php
   
class Test{
        const
ONE = "Number one";
        const
TWO = "Number two";
    }
   
   
$obj = new ReflectionClass( "Test" );
    echo
$obj->getconstant( "ONE" )."\n";
    echo
$obj->getconstant( "TWO" )."\n";
   
?>

output:
Number one
Number two
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