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, PHP 8)
ReflectionClass::getConstant — 定義されている定数を取得する
パラメータ
-
name -
取得する対象のクラス定数の名前。
戻り値
name で指定した名前の定数の値を返します。
そのクラスに定数が見つからなかった場合は、false を返します。
例
例1 ReflectionClass::getConstant() の使い方
<?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'));
?>上の例の出力は以下となります。
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 ¶
11 years ago
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
