{"id":354,"date":"2019-11-29T05:32:12","date_gmt":"2019-11-29T05:32:12","guid":{"rendered":"http:\/\/appfinz.com\/blogs\/?p=354"},"modified":"2025-05-15T05:14:46","modified_gmt":"2025-05-15T05:14:46","slug":"php-approves-short-arrow-function","status":"publish","type":"post","link":"https:\/\/www.appfinz.com\/blogs\/php-approves-short-arrow-function\/","title":{"rendered":"PHP Approves Short Arrow Functions"},"content":{"rendered":"\n

The PHP team<\/a> recently approved the Short Arrow Functions RFC proposed by Nikita Popov, Levi Morrison, and Bob Weinand.<\/p>\n\n\n\n

In the RFC it shows this as an example to give you an idea on how it can be used:<\/p>\n\n\n\n

$extended = function ($c) use ($callable, $factory) {\n    return $callable($factory($c), $c);\n};\n \n\/\/ with arrow function:\n\/\/ Appfinz Technologies \n$extended = fn($c) => $callable($factory($c), $c);\n\n A Laravel example could look like this: \n\n\/\/ Current\n$users->map(function($user) {\n    return $user->first_name.' '.$user->last_name;\n});\n\n\/\/ with arrow function:\n\/\/ appfinz Technologies \n$users->map(\n    fn($user) => $user->first_name.' '.$user->last_name\n);<\/pre><\/div>\n\n\n\n
\u2705 Latest on PHP Short Arrow Functions<\/h3>\n\n\n\n
1. Syntax Simplification (PHP 7.4+)<\/strong>
PHP introduced short arrow functions in version 7.4<\/strong> to reduce verbosity when writing closures.<\/p>\n\n\n\n
\/\/ Traditional anonymous function\n$double = function ($x) {\n    return $x * 2;\n};\n\n\/\/ Short arrow function\n$double = fn($x) => $x * 2;\n<\/pre><\/div>\n\n\n\n
2. Implicit use<\/code> Handling<\/strong>
Short arrow functions automatically capture variables<\/em> from the parent scope \u2014 unlike traditional closures where you need use()<\/code> explicitly.<\/p>\n\n\n\n
$multiplier = 3;\n\n\/\/ Short arrow captures $multiplier automatically\n$triple = fn($x) => $x * $multiplier;\n<\/pre><\/div>\n\n\n\n
3. Single Expression Limitation<\/strong>
Short arrow functions only support a single expression<\/strong> \u2014 no blocks, conditionals, or multiple statements.<\/p>\n\n\n\n
\/\/ \u2705 Valid\n$sum = fn($a, $b) => $a + $b;\n\n\/\/ \u274c Invalid - cannot use multiple statements or blocks\n\/\/ $func = fn($x) => { $y = $x + 1; return $y; };\n<\/pre><\/div>\n\n\n\n
4. Use Cases Growing in Modern PHP<\/strong>
They’re now widely used in:<\/p>\n\n\n\n
    \n
  • Laravel collections<\/li>\n\n\n\n
  • Functional programming patterns<\/li>\n\n\n\n
  • Array mapping\/filtering<\/li>\n<\/ul>\n\n\n\n
    $data = [1, 2, 3, 4];\n$filtered = array_filter($data, fn($n) => $n % 2 === 0);\n<\/pre><\/div>\n\n\n\n
    5. Performance & Readability<\/strong>
    They are not faster<\/strong>, but significantly improve code clarity and brevity<\/strong>, especially in inline functions.<\/p>\n\n\n\n
    \ud83d\udccc Summary<\/h3>\n\n\n\n
    PHP short arrow functions (fn() =><\/code>) are great for cleaner, simpler, and modern-looking code. They automatically inherit scope variables and are ideal for one-liners, making PHP more competitive with modern functional paradigms seen in JavaScript, Python, etc.<\/p>\n\n\n\n
    If you’re using PHP 7.4 or newer<\/strong>, it’s highly recommended to adopt them wherever applicable \u2014 especially in array operations, callbacks, and simple logic.<\/p>\n","protected":false},"excerpt":{"rendered":"
    The PHP team recently approved the Short Arrow Functions RFC proposed by Nikita Popov, Levi<\/p>\n","protected":false},"author":1,"featured_media":357,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[53,97],"class_list":["post-354","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-php","tag-php","tag-php-7-4"],"_links":{"self":[{"href":"https:\/\/www.appfinz.com\/blogs\/wp-json\/wp\/v2\/posts\/354","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appfinz.com\/blogs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appfinz.com\/blogs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appfinz.com\/blogs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appfinz.com\/blogs\/wp-json\/wp\/v2\/comments?post=354"}],"version-history":[{"count":7,"href":"https:\/\/www.appfinz.com\/blogs\/wp-json\/wp\/v2\/posts\/354\/revisions"}],"predecessor-version":[{"id":1386,"href":"https:\/\/www.appfinz.com\/blogs\/wp-json\/wp\/v2\/posts\/354\/revisions\/1386"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.appfinz.com\/blogs\/wp-json\/wp\/v2\/media\/357"}],"wp:attachment":[{"href":"https:\/\/www.appfinz.com\/blogs\/wp-json\/wp\/v2\/media?parent=354"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appfinz.com\/blogs\/wp-json\/wp\/v2\/categories?post=354"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appfinz.com\/blogs\/wp-json\/wp\/v2\/tags?post=354"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}