ReflectionClass::getConstant

(PHP 5, PHP 7)

ReflectionClass::getConstantGets defined constant

Opis

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

Gets the defined constant.

Ostrzeżenie

Ta funkcja jest obecnie nieudokumentowana, dostępna jest jedynie lista jej argumentów.

Parametry

name

The name of the class constant to get.

Zwracane wartości

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

Przykłady

Przykład #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'));
?>

Powyższy przykład wyświetli:

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

Zobacz też:

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User Contributed Notes 2 notes

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1
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
1
Bhimsen
8 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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