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<?php |
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// +---------------------------------------------------------------------- |
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// | ThinkPHP [ WE CAN DO IT JUST THINK ] |
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// +---------------------------------------------------------------------- |
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// | Copyright (c) 2006~2021 http://thinkphp.cn All rights reserved. |
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// +---------------------------------------------------------------------- |
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 ) |
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// +---------------------------------------------------------------------- |
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// | Author: yunwuxin <[email protected]> |
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// +---------------------------------------------------------------------- |
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namespace think; |
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use Closure; |
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use Exception; |
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use Throwable; |
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class Pipeline |
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{ |
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protected $passable; |
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protected $pipes = []; |
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protected $exceptionHandler; |
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/** |
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* 初始数据 |
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* @param $passable |
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* @return $this |
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*/ |
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public function send($passable) |
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{ |
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$this->passable = $passable; |
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return $this; |
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} |
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/** |
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* 调用栈 |
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* @param $pipes |
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* @return $this |
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*/ |
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public function through($pipes) |
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{ |
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$this->pipes = is_array($pipes) ? $pipes : func_get_args(); |
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return $this; |
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} |
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/** |
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* 执行 |
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* @param Closure $destination |
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* @return mixed |
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*/ |
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public function then(Closure $destination) |
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{ |
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$pipeline = array_reduce( |
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array_reverse($this->pipes), |
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$this->carry(), |
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function ($passable) use ($destination) { |
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try { |
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return $destination($passable); |
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} catch (Throwable | Exception $e) { |
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return $this->handleException($passable, $e); |
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} |
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} |
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); |
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return $pipeline($this->passable); |
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} |
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/** |
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* 设置异常处理器 |
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* @param callable $handler |
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* @return $this |
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*/ |
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public function whenException($handler) |
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{ |
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$this->exceptionHandler = $handler; |
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return $this; |
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} |
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protected function carry() |
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{ |
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return function ($stack, $pipe) { |
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return function ($passable) use ($stack, $pipe) { |
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try { |
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return $pipe($passable, $stack); |
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} catch (Throwable | Exception $e) { |
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return $this->handleException($passable, $e); |
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} |
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}; |
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}; |
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} |
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/** |
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* 异常处理 |
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* @param $passable |
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* @param $e |
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* @return mixed |
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*/ |
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protected function handleException($passable, Throwable $e) |
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{ |
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if ($this->exceptionHandler) { |
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return call_user_func($this->exceptionHandler, $passable, $e); |
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} |
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throw $e; |
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} |
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} |
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top-think /
framework
Let?s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let?s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: