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 ;
}
ReflectionClass::getConstant
(PHP 5, PHP 7)
ReflectionClass::getConstant — Gets defined constant
Opis
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)
add a note
User Contributed Notes 2 notes
aurelien dot tisserand at wavesoftware dot ch ¶
10 years ago
Bhimsen ¶
11 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
