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run code in 300+ PHP versions simultaneously
<?php class Hoge { const CONST_FOO = 'foo'; public function __construct() { // 定数が存在する場合 print constant('self::CONST_FOO') . PHP_EOL; // PHP8以降では定数が存在しない場合は例外が送出される try { print constant('self::NOT_EXIST'); } catch (Error $e) { print $e->getMessage(); print $e->getTraceAsString(); } } } $obj = new Hoge();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
foo Undefined constant self::NOT_EXIST#0 /in/tbFJR(14): constant('self::NOT_EXIST') #1 /in/tbFJR(22): Hoge->__construct() #2 {main}
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
foo Warning: constant(): Couldn't find constant self::NOT_EXIST in /in/tbFJR on line 14
preferences:
141.51 ms | 407 KiB | 5 Q