**一.Assert改進** #php.ini默認開啟 #assert(true === false); 1.低版本下失敗的assert斷言會引發警告，但不會引發異常.(PHP5) ~~~ assert.exception=On ~~~ 2.php8開始失敗的assert斷言會直接引發異常.(PHP7，PHP8) ~~~ assert.exception=On ~~~ **二.Assert回調** 1.display\_errors = Off 2.assert.callback = assert\_fail 3.回調實驗 ~~~ assert(5<10); function assert_fail($file,$line,$assertion,$description){ echo $file; echo '<br>'; echo $line; echo '<br>'; echo $description; } ~~~