PHPWales 2020 - June 3rd to June 4th

ReflectionClass::getConstant

(PHP 5, PHP 7)

ReflectionClass::getConstantGets defined constant

Descrição

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

Gets the defined constant.

Aviso

Esta função não está documentada; somente a lista de argumentos está disponível.

Parâmetros

name

The name of the class constant to get.

Valor Retornado

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

Exemplos

Exemplo #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'));
?>

O exemplo acima irá imprimir:

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

Veja Também

add a note add a note

User Contributed Notes 2 notes

up
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 ;
}
up
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
To Top