{"id":2459,"date":"2021-08-26T05:01:29","date_gmt":"2021-08-26T05:01:29","guid":{"rendered":"https:\/\/phptutorial.net\/?page_id=2459"},"modified":"2025-04-06T07:18:44","modified_gmt":"2025-04-06T07:18:44","slug":"php-call_user_func_array","status":"publish","type":"page","link":"https:\/\/www.phptutorial.net\/php-tutorial\/php-call_user_func_array\/","title":{"rendered":"PHP call_user_func_array"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you&#8217;ll learn about the <code>call_user_func_array()<\/code> function and how to use it to call a function dynamically.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='introduction-to-the-php-call_user_func_array-function'>Introduction to the PHP call_user_func_array() function <a href=\"#introduction-to-the-php-call_user_func_array-function\" class=\"anchor\" id=\"introduction-to-the-php-call_user_func_array-function\" title=\"Anchor for Introduction to the PHP call_user_func_array() function\">#<\/a><\/h2>\n\n\n\n<p>The <code>call_user_func_array()<\/code> function calls a callback function with <a href=\"https:\/\/phptutorial.net\/php-tutorial\/php-function-parameters\/\">parameters<\/a>. <\/p>\n\n\n\n<p>Here&#8217;s the syntax of the <code>call_user_func_array()<\/code> function:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">call_user_func_array(callable $callback, <span class=\"hljs-keyword\">array<\/span> $args): mixed<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The <code>call_user_func_array()<\/code> has two parameters:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>$callback<\/code> is the name of a function or any callable that will be called.<\/li>\n\n\n\n<li><code>$args<\/code> is an array that contains the parameters of the <code>$callback<\/code>.<\/li>\n<\/ul>\n\n\n\n<p>The <code>call_user_func_array()<\/code> returns the value of the <code>$callback<\/code>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='php-call_user_func_array-function-example'>PHP call_user_func_array function example <a href=\"#php-call_user_func_array-function-example\" class=\"anchor\" id=\"php-call_user_func_array-function-example\" title=\"Anchor for PHP call_user_func_array function example\">#<\/a><\/h2>\n\n\n\n<p>The following example illustrates how to use the <code>call_user_func_array()<\/code> function:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n<span class=\"hljs-function\"><span class=\"hljs-keyword\">function<\/span> <span class=\"hljs-title\">add<\/span><span class=\"hljs-params\">(int $a, int $b)<\/span>: <span class=\"hljs-title\">int<\/span> <\/span>{\n    <span class=\"hljs-keyword\">return<\/span> $a + $b;\n}\n\n$result = call_user_func_array(<span class=\"hljs-string\">'add'<\/span>,&#91;<span class=\"hljs-number\">10<\/span>,<span class=\"hljs-number\">20<\/span>]);\n\n<span class=\"hljs-keyword\">echo<\/span> $result; <span class=\"hljs-comment\">\/\/ 30<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/phptutorial.net\/playground\/?q=PD9waHAKCmZ1bmN0aW9uIGFkZChpbnQgJGEsIGludCAkYik6IGludCB7CiAgICByZXR1cm4gJGEgKyAkYjsKfQoKJHJlc3VsdCA9IGNhbGxfdXNlcl9mdW5jX2FycmF5KCdhZGQnLFsxMCwyMF0pOwoKZWNobyAkcmVzdWx0OyAvLyAzMA\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\"><span><code class=\"hljs\">30<\/code><\/span><\/pre>\n\n\n<p>How it works.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>First, <a href=\"https:\/\/phptutorial.net\/php-tutorial\/php-functions\/\">define a function<\/a> <code>add()<\/code> that returns the sum of two integers.<\/li>\n\n\n\n<li>Second, call the <code>add()<\/code> function via the <code>call_user_func_array()<\/code> function. The first argument is the function name, and the second argument is an array of arguments of the <code>add()<\/code> function.<\/li>\n\n\n\n<li>Third, show the result to the output.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id='summary'>Summary <a href=\"#summary\" class=\"anchor\" id=\"summary\" title=\"Anchor for Summary\">#<\/a><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use the PHP <code>call_user_func_array()<\/code> function to call a callback with parameters<\/li>\n<\/ul>\n<div class=\"helpful-block-content\" data-title=\"\">\n\t<header>\n\t\t<div class=\"wth-question\">Did you find this tutorial useful?<\/div>\n\t\t<div class=\"wth-thumbs\">\n\t\t\t<button\n\t\t\t\tdata-post=\"2459\"\n\t\t\t\tdata-post-url=\"https:\/\/www.phptutorial.net\/php-tutorial\/php-call_user_func_array\/\"\n\t\t\t\tdata-post-title=\"PHP call_user_func_array\"\n\t\t\t\tdata-response=\"1\"\n\t\t\t\tclass=\"wth-btn-rounded wth-yes-btn\"\n\t\t\t>\n\t\t\t\t<svg\n\t\t\t\t\txmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n\t\t\t\t\tviewBox=\"0 0 24 24\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"currentColor\"\n\t\t\t\t\tstroke-width=\"2\"\n\t\t\t\t\tstroke-linecap=\"round\"\n\t\t\t\t\tstroke-linejoin=\"round\"\n\t\t\t\t\tclass=\"feather feather-thumbs-up block w-full h-full\"\n\t\t\t\t>\n\t\t\t\t\t<path\n\t\t\t\t\t\td=\"M14 9V5a3 3 0 0 0-3-3l-4 9v11h11.28a2 2 0 0 0 2-1.7l1.38-9a2 2 0 0 0-2-2.3zM7 22H4a2 2 0 0 1-2-2v-7a2 2 0 0 1 2-2h3\"\n\t\t\t\t\t><\/path>\n\t\t\t\t<\/svg>\n\t\t\t\t<span class=\"sr-only\"> Yes <\/span>\n\t\t\t<\/button>\n\n\t\t\t<button\n\t\t\t\tdata-response=\"0\"\n\t\t\t\tdata-post=\"2459\"\n\t\t\t\tdata-post-url=\"https:\/\/www.phptutorial.net\/php-tutorial\/php-call_user_func_array\/\"\n\t\t\t\tdata-post-title=\"PHP call_user_func_array\"\n\t\t\t\tclass=\"wth-btn-rounded wth-no-btn\"\n\t\t\t>\n\t\t\t\t<svg\n\t\t\t\t\txmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n\t\t\t\t\tviewBox=\"0 0 24 24\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"currentColor\"\n\t\t\t\t\tstroke-width=\"2\"\n\t\t\t\t\tstroke-linecap=\"round\"\n\t\t\t\t\tstroke-linejoin=\"round\"\n\t\t\t\t>\n\t\t\t\t\t<path\n\t\t\t\t\t\td=\"M10 15v4a3 3 0 0 0 3 3l4-9V2H5.72a2 2 0 0 0-2 1.7l-1.38 9a2 2 0 0 0 2 2.3zm7-13h2.67A2.31 2.31 0 0 1 22 4v7a2.31 2.31 0 0 1-2.33 2H17\"\n\t\t\t\t\t><\/path>\n\t\t\t\t<\/svg>\n\t\t\t\t<span class=\"sr-only\"> No <\/span>\n\t\t\t<\/button>\n\t\t<\/div>\n\t<\/header>\n\n\t<div class=\"wth-form hidden\">\n\t\t<div class=\"wth-form-wrapper\">\n\t\t\t<div class=\"wth-title\"><\/div>\n\t\t\t\n\t\t\t<textarea class=\"wth-message\"><\/textarea>\n\n\t\t\t<button class=\"btn btn-primary wth-btn-submit\">Send<\/button>\n\t\t\t<button class=\"btn wth-btn-cancel\">Cancel<\/button>\n\t\t\n\t\t<\/div>\n\t<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>In this tutorial, you&#8217;ll learn about the call_user_func_array() function and how to use it to build a validation library.<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":15,"menu_order":69,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2459","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/pages\/2459","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/comments?post=2459"}],"version-history":[{"count":5,"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/pages\/2459\/revisions"}],"predecessor-version":[{"id":3123,"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/pages\/2459\/revisions\/3123"}],"up":[{"embeddable":true,"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/pages\/15"}],"wp:attachment":[{"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/media?parent=2459"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}