The defer statement originally comes from Golang. This library allows you to use the defer functionality in your PHP code.
<?php defer($context, $callback);
defer requires two parameters: $context and $callback.
$context- unused in your app, required to achieve the "defer" effect. I recommend to use$_always.$callback- a callback which is executed after the surrounding function returns.
<?php function helloGoodbye() { defer($_, function () { echo "goodbye\n"; }); defer($_, function () { echo "...\n"; }); echo "hello\n"; } echo "before hello\n"; helloGoodbye(); echo "after goodbye\n"; // Output: // // before hello // hello // ... // goodbye // after goodbye
<?php function throwException() { defer($_, function () { echo "after exception\n"; }); echo "before exception\n"; throw new \Exception('My exception'); } try { throwException(); } catch (\Exception $e) { echo "exception has been caught\n"; } // Output: // // before exception // after exception // exception has been caught
PHP Defer supports all PHP versions from ^5.3 to ^8.0.
The following command will install the latest possible version of PHP Defer for your PHP interpreter.
composer require "php-defer/php-defer:^3.0|^4.0|^5.0"
This library is inspired by mostka/defer.