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)

Vedere anche:

ReflectionClass::getConstants() - Gets constants

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User Contributed Notes 2 notes

down

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 ¶

12 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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