Popularity
3.1
Growing
Activity
1.6
-
211
4
12

Description

A defer statement originally comes from Golang. This library allows you to use defer functionality in PHP code.

Programming language: PHP
License: MIT License
Tags: Event     Miscellaneous     Async    
Latest version: v5.0.3

PHP Defer alternatives and similar libraries

Based on the "Event" category.
Alternatively, view PHP Defer alternatives based on common mentions on social networks and blogs.

Do you think we are missing an alternative of PHP Defer or a related project?

Add another 'Event' Library

README

PHP Defer

Coverage Status Build Status

A defer statement originally comes from Golang. This library allows you to use defer functionality in PHP code.

Usage

<?php

defer($context, $callback);

defer requires two parameters: $context and $callback.

  1. $context - unused in your app, required to achieve "defer" effect. I recommend to use $_ always.
  2. $callback - a callback which is executed after the surrounding function returns.

Examples

Defer the execution of a code

<?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

Defer and exceptions

<?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

Installation

PHP Defer supports all PHP versions from ^5.3 to ^7.4. 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"

Credits

This library is inspired by mostka/defer.