ReflectionClass::getConstant

(PHP 5, PHP 7, PHP 8)

ReflectionClass::getConstant — Obtiene una constante

Descripción

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

Obtiene una constante definida.

Parámetros

name: El nombre de la constante de clase a obtener.

Valores devueltos

Valor de la constante con el nombre name. Devuelve false si la constante no ha sido encontrada en la clase.

Ejemplos

Ejemplo #1 Uso de 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'));
?>

El ejemplo anterior mostrará :

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

Ver también

ReflectionClass::getConstants() - Obtener constantes

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User Contributed Notes 2 notes

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aurelien dot tisserand at wavesoftware dot ch ¶

11 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 ;}

down

Bhimsen ¶

13 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 oneNumber two

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