在对象方法中未捕获异常

这更多的是为了文档，因为我已经解决了这个问题，但它很微妙，很难调试，我认为它在公共领域会很有用。

问题是，我有一个try/catch块在对象方法，只是不工作。简化后的示例位于两个文件中，如下所示:

TestClass.php:

<?php
//TestClass.php
namespace MyTest;
class TestClass {
    public function __construct() {
        'e("Initializing object");
        try {
            'e("Trying object exception");
            'throwTestException("Failing gracefully in object");
            'e("After exception");
        } catch (Exception $e) {
            'e($e->getMessage());
        }
        'e("After object init exception");
    }
}
?>

Main.php:

<?php
//Main.php
function e($str) { echo "'n$str"; }
function throwTestException($msg) {
    throw new RuntimeException($msg);
}
require "TestClass.php";
e("Beginning");
try {
    e("First try");
    throwTestException("Failing gracefully first");
    e("After exception");
} catch (Exception $e) {
    e($e->getMessage());
}
e("Ending");
e('');
e('Beginning object test');
new 'MyTest'TestClass();
e('Ending object test');
?>

加载Main.php的预期结果是:

Beginning
First try
Failing gracefully first
Ending
Beginning object test
Initializing object
Trying object exception
Failing gracefully in object
After object init exception
Ending object test

我实际得到的是这样的:

Beginning
First try
Failing gracefully first
Ending
Beginning object test
Initializing object
Trying object exception
Fatal Error: Uncaught Exception: Failing gracefully in object......

可以看到，异常没有被捕获。我试了各种各样的方法，就是不明白为什么它没有被抓住。然后……