locutus/esm/php/funchand/function_exists.js

Locutus other languages' standard libraries to JavaScript for fun and educational purposes

import { getPhpGlobalCallable } from "../_helpers/_phpRuntimeState.js";
export function function_exists(funcName) {
    //  discuss at: https://locutus.io/php/function_exists/
    // original by: Kevin van Zonneveld (https://kvz.io)
    // improved by: Steve Clay
    // improved by: Legaev Andrey
    // improved by: Brett Zamir (https://brett-zamir.me)
    //   example 1: function_exists('isFinite')
    //   returns 1: true
    return typeof getPhpGlobalCallable(funcName) === 'function';
}