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)

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    User Contributed Notes 2 notes

    up
    4
    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 ;
    }
    up
    3
    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 one
    Number two
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