先上代码

ECHO PHP_VERSION.PHP_EOL;
function add (int $left,int $right){
  return $left+$right;
 }
try {
    echo add('left', 'right');
} catch (Exception $e) {
    // Handle exception
} catch (Error $e) { // Clearly a different type of object
    // Log error and end gracefully
    var_dump($e->getMessage());
}
echo PHP_EOL."helloword".PHP_EOL;

PHP v5.6.1结果

5.6.1
PHP Catchable fatal error:  Argument 1 passed to add() must be an instance of int, string given, called in C:\usertb\shareubuntu\Workerman\fortest.php on line 8 and defined in C:\usertb\shareubuntu\Workerman\fortest.php on line 3
Catchable fatal error: Argument 1 passed to add() must be an instance of int, string given, called in C:\usertb\shareubuntu\Workerman\fortest.php on line 8 and defined in C:\usertb\shareubuntu\Workerman\fortest.php on line 3
[Finished in 0.0s]

PHP v7.0.15结果

7.0.15-0ubuntu0.16.04.4
string(131) "Argument 1 passed to add() must be of the type integer, string given, called in /home/tb/win10share/Workerman/fortest.php on line 8"
helloword

区别

在于后者可以捕获fatal error，并且可以正常输出helloword

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