1 <html> 2 <body> 3 <!-- 類內聲明及使用 --> 4 <?php 5 class TestConst { 6 const COUNTRY = 'China'; //const不能加public,static,也不需要$ 7 static $static = 'Static'; 8 9 public function getCountry() {10 return self::COUNTRY; //類內調用必須使用self11 }12 }13 14 $test = new TestConst();15 16 var_dump($test);17 echo '<br>';18 19 echo $test->getCountry() . '<br>';20 echo TestConst::COUNTRY . '<br>'; //const可以直接使用class::constVar的形式調用21 ?>22 23 <!-- 指令碼內聲明及使用 -->24 <?php25 const COUNTRY = 'Japan';26 echo COUNTRY . '<br>';27 ?>28 </body>29 </html>
頁面輸出
object(TestConst)#1 (0) { }
China
China
Japan
值得一提的是static和const變數在執行個體中都不會存在,也就是說他們都是只存在與類裡的
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