ReflectionClass::getConstant

    (PHP 5, PHP 7, PHP 8)

    ReflectionClass::getConstant — Gets defined constant

    Descrizione

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

    Gets the defined constant.

    Elenco dei parametri

    name

    The name of the class constant to get.

    Valori restituiti

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

    Esempi

    Example #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'));
    ?>

    Il precedente esempio visualizzerà:

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

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    User Contributed Notes 2 notes

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    3
    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
    2
    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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