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<?php
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<?php
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/*
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/*
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 * PHP Utilities - Misc functions
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 * PHP Utilities - Misc functions
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 * Copyright 2019 - 2023 Daniel Marschall, ViaThinkSoft
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 * Copyright 2019 - 2023 Daniel Marschall, ViaThinkSoft
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 * Revision: 2023-02-27
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 * Revision: 2023-08-01
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 *
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 * You may obtain a copy of the License at
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 *
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 *
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        }
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        }
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        return false;
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        return false;
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}
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}
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function isInternetExplorer() {
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function isInternetExplorer() {
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        // see also includes/oidplus_base.js
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        $ua = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : '';
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        $ua = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : '';
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        return ((strpos($ua,'MSIE ') !== false) || (strpos($ua,'Trident/') !== false));
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        return ((strpos($ua,'MSIE ') !== false) || (strpos($ua,'Trident/') !== false));
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}
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}
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- 
 
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if (!function_exists('str_starts_with')) {
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        // PHP 7.x compatibility
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        // source: Laravel Framework
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        // https://github.com/laravel/framework/blob/8.x/src/Illuminate/Support/Str.php
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        function str_starts_with($haystack, $needle) {
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                return (string)$needle !== '' && strncmp($haystack, $needle, strlen($needle)) === 0;
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        }
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}
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if (!function_exists('str_ends_with')) {
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if (!function_exists('str_ends_with')) {
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        // PHP 7.x compatibility
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        // PHP 7.x compatibility
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        // source: Laravel Framework
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        // https://github.com/laravel/framework/blob/8.x/src/Illuminate/Support/Str.php
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        function str_ends_with($haystack, $needle) {
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        function str_ends_with($haystack, $needle) {
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                $length = strlen($needle);
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                return $length > 0 ? substr($haystack, -$length) === $needle : true;
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                return $needle !== '' && substr($haystack, -strlen($needle)) === (string)$needle;
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        }
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        }
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}
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}
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if (!function_exists('str_starts_with')) {
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if (!function_exists('str_contains')) {
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        // PHP 7.x compatibility
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        // PHP 7.x compatibility
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        // source: Laravel Framework
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        // https://github.com/laravel/framework/blob/8.x/src/Illuminate/Support/Str.php
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        function str_starts_with($haystack, $needle) {
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        function str_contains($haystack, $needle) {
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                return strpos($haystack, $needle) === 0;
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                return $needle !== '' && mb_strpos($haystack, $needle) !== false;
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        }
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        }
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}
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}
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function random_bytes_ex($len, $raw=true, $force_cryptographically_secure=true) {
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function random_bytes_ex($len, $raw=true, $force_cryptographically_secure=true) {
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        if ($len === 0) return '';
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        if ($len === 0) return '';