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Editing: class.u.php

<?php

use Duplicator\Libs\Snap\SnapIO;

/**
 * Recursivly scans a directory and finds all sym-links and unreadable files
 *
 * Standard: PSR-2
 *
 * @link http://www.php-fig.org/psr/psr-2
 *
 * @package    Duplicator
 * @subpackage classes/utilities
 * @copyright  (c) 2017, Snapcreek LLC
 *
 * @todo Refactor out IO methods into class.io.php file
 */

class DUP_Util
{
    /**
     * Is PHP 5.2.9 or better running
     */
    public static $on_php_529_plus;

/**
     * Is PHP 5.3 or better running
     */
    public static $on_php_53_plus;

/**
     * Is PHP 5.4 or better running
     */
    public static $on_php_54_plus;

/**
     * Is PHP 7 or better running
     */
    public static $PHP7_plus;

/**
     * array of ini disable functions
     *
     * @var array
     */
    private static $iniDisableFuncs = null;

/**
     *  Initialized on load (see end of file)
     */
    public static function init()
    {
        /** @todo Remove the static init method in favor of always consistent values */
        self::$on_php_529_plus = version_compare(PHP_VERSION, '5.2.9') >= 0;
        self::$on_php_53_plus  = version_compare(PHP_VERSION, '5.3.0') >= 0;
        self::$on_php_54_plus  = version_compare(PHP_VERSION, '5.4.0') >= 0;
        self::$PHP7_plus       = version_compare(PHP_VERSION, '7.0.0', '>=');
    }

public static function getArchitectureString()
    {
        switch (PHP_INT_SIZE) {
            case 4:
                return esc_html__('32-bit', 'duplicator');
                break;
            case 8:
                return esc_html__('64-bit', 'duplicator');
                break;
            default:
                return esc_html__('Unknown', 'duplicator');
        }
    }

public static function objectCopy($srcObject, $destObject, $skipMemberArray = null)
    {
        foreach ($srcObject as $member_name => $member_value) {
            if (!is_object($member_value) && (($skipMemberArray == null) || !in_array($member_name, $skipMemberArray))) {
                // Skipping all object members
                $destObject->$member_name = $member_value;
            }
        }
    }

public static function getWPCoreDirs()
    {
        $wp_core_dirs = array(get_home_path() . 'wp-admin', get_home_path() . 'wp-includes');

//if wp_content is overrided
        $wp_path = get_home_path() . "wp-content";
        if (get_home_path() . 'wp-content' != WP_CONTENT_DIR) {
            $wp_path = WP_CONTENT_DIR;
        }
        $wp_path = str_replace("\\", "/", $wp_path);

$wp_core_dirs[] = $wp_path;
        $wp_core_dirs[] = $wp_path . '/plugins';
        $wp_core_dirs[] = $wp_path . '/themes';

return $wp_core_dirs;
    }

/**
     * return absolute path for the files that are core directories
     *
     * @return string array
     */
    public static function getWPCoreFiles()
    {
        $wp_cored_dirs = array(get_home_path() . 'wp-config.php');
        return $wp_cored_dirs;
    }

/**
     * Groups an array into arrays by a given key, or set of keys, shared between all array members.
     *
     * Based on {@author Jake Zatecky}'s {@link https://github.com/jakezatecky/array_group_by array_group_by()} function.
     * This variant allows $key to be closures.
     *
     * @param array $array   The array to have grouping performed on.
     * @param mixed $key,... The key to group or split by. Can be a _string_, an _integer_, a _float_, or a _callable_.
     *                       - If the key is a callback, it must return a valid key from the array.
     *                       - If the key is _NULL_, the iterated element is skipped.
     *                       - string|oink callback ( mixed $item )
     *
     * @return array|null Returns a multidimensional array or `null` if `$key` is invalid.
     */
    public static function array_group_by(array $array, $key)
    {
        if (!is_string($key) && !is_int($key) && !is_float($key) && !is_callable($key)) {
            trigger_error('array_group_by(): The key should be a string, an integer, or a callback', E_USER_ERROR);
            return null;
        }
        $func = (!is_string($key) && is_callable($key) ? $key : null);
        $_key = $key;
        // Load the new array, splitting by the target key
        $grouped = array();
        foreach ($array as $value) {
            $key = null;
            if (is_callable($func)) {
                $key = call_user_func($func, $value);
            } elseif (is_object($value) && isset($value->{$_key})) {
                $key = $value->{$_key};
            } elseif (isset($value[$_key])) {
                $key = $value[$_key];
            }
            if ($key === null) {
                continue;
            }
            $grouped[$key][] = $value;
        }
        // Recursively build a nested grouping if more parameters are supplied
        // Each grouped array value is grouped according to the next sequential key
        if (func_num_args() > 2) {
            $args = func_get_args();
            foreach ($grouped as $key => $value) {
                $params        = array_merge(array($value), array_slice($args, 2, func_num_args()));
                $grouped[$key] = call_user_func_array('DUP_Util::array_group_by', $params);
            }
        }
        return $grouped;
    }

/**
     * PHP_SAPI for FCGI requires a data flush of at least 256
     * bytes every 40 seconds or else it forces a script halt
     *
     * @return string A series of 256 space characters
     */
    public static function fcgiFlush()
    {
        echo(str_repeat(' ', 300));
        @flush();
        @ob_flush();
    }

public static function isWpDebug()
    {
        return defined('WP_DEBUG') && WP_DEBUG;
    }

/**
     * Returns the last N lines of a file. Equivalent to tail command
     *
     * @param string $filepath The full path to the file to be tailed
     * @param int $lines The number of lines to return with each tail call
     *
     * @return string The last N parts of the file
     */
    public static function tailFile($filepath, $lines = 2)
    {
        // Open file
        $f = @fopen($filepath, "rb");
        if ($f === false) {
            return false;
        }

// Sets buffer size
        $buffer = 256;

// Jump to last character
        fseek($f, -1, SEEK_END);

// Read it and adjust line number if necessary
        // (Otherwise the result would be wrong if file doesn't end with a blank line)
        if (fread($f, 1) != "\n") {
            $lines -= 1;
        }

// Start reading
        $output = '';
        $chunk  = '';

// While we would like more
        while (ftell($f) > 0 && $lines >= 0) {
            // Figure out how far back we should jump
            $seek = min(ftell($f), $buffer);
            // Do the jump (backwards, relative to where we are)
            fseek($f, -$seek, SEEK_CUR);
            // Read a chunk and prepend it to our output
            $output = ($chunk  = fread($f, $seek)) . $output;
            // Jump back to where we started reading
            fseek($f, -mb_strlen($chunk, '8bit'), SEEK_CUR);
            // Decrease our line counter
            $lines -= substr_count($chunk, "\n");
        }

// While we have too many lines
        // (Because of buffer size we might have read too many)
        while ($lines++ < 0) {
            // Find first newline and remove all text before that
            $output = substr($output, strpos($output, "\n") + 1);
        }
        fclose($f);
        return trim($output);
    }

/**
     * Display human readable byte sizes
     *
     * @param int $size    The size in bytes
     *
     * @return string The size of bytes readable such as 100KB, 20MB, 1GB etc.
     */
    public static function byteSize($size, $roundBy = 2)
    {
        try {
            $units = array('B', 'KB', 'MB', 'GB', 'TB');
            for ($i = 0; $size >= 1024 && $i < 4; $i++) {
                $size /= 1024;
            }
            return round($size, $roundBy) . $units[$i];
        } catch (Exception $e) {
            return "n/a";
        }
    }

/**
     * Makes path safe for any OS
     *      Paths should ALWAYS READ be "/"
     *          uni: /home/path/file.txt
     *          win:  D:/home/path/file.txt
     *
     * @param string $path      The path to make safe
     *
     * @return string A path with all slashes facing "/"
     */
    public static function safePath($path)
    {
        return str_replace("\\", "/", $path);
    }

/**
     * Get current microtime as a float.  Method is used for simple profiling
     *
     * @see elapsedTime
     *
     * @return string   A float in the form "msec sec", where sec is the number of seconds since the Unix epoch
     */
    public static function getMicrotime()
    {
        return microtime(true);
    }

/**
     * Append the value to the string if it doesn't already exist
     *
     * @param string $string The string to append to
     * @param string $value The string to append to the $string
     *
     * @return string Returns the string with the $value appended once
     */
    public static function appendOnce($string, $value)
    {
        return $string . (substr($string, -1) == $value ? '' : $value);
    }

/**
     * Return a string with the elapsed time
     *
     * @see getMicrotime()
     *
     * @param mixed number $end     The final time in the sequence to measure
     * @param mixed number $start   The start time in the sequence to measure
     *
     * @return string   The time elapsed from $start to $end
     */
    public static function elapsedTime($end, $start)
    {
        return sprintf(
            esc_html_x(
                "%.2f sec.",
                "sec. stands for seconds",
                "duplicator"
            ),
            abs($end - $start)
        );
    }

/**
     * List all of the files of a path
     *
     * @param string $path The full path to a system directory
     *
     * @return array of all files in that path
     *
     * Notes:
     *  - Avoid using glob() as GLOB_BRACE is not an option on some operating systems
     *  - Pre PHP 5.3 DirectoryIterator will crash on unreadable files
     *  - Scandir will not crash on unreadable items, but will not return results
     */
    public static function listFiles($path = '.')
    {
        try {
            $files = array();
            if ($dh    = opendir($path)) {
                while (($file = readdir($dh)) !== false) {
                    if ($file == '.' || $file == '..') {
                        continue;
                    }
                    $full_file_path = trailingslashit($path) . $file;
                    $files[]        = str_replace("\\", '/', $full_file_path);
                }
                @closedir($dh);
            }
            return $files;
        } catch (Exception $exc) {
            $result = array();
            $files  = @scandir($path);
            if (is_array($files)) {
                foreach ($files as $file) {
                    $result[] = str_replace("\\", '/', $path) . $file;
                }
            }
            return $result;
        }
    }

/**
     * List all of the directories of a path
     *
     * @param string $path The full path to a system directory
     *
     * @return array of all dirs in the $path
     */
    public static function listDirs($path = '.')
    {
        $dirs = array();

foreach (new DirectoryIterator($path) as $file) {
            if ($file->isDir() && !$file->isDot()) {
                $dirs[] = DUP_Util::safePath($file->getPathname());
            }
        }
        return $dirs;
    }

/**
     * Does the directory have content
     *
     * @param string $path The full path to a system directory
     *
     * @return bool Returns true if directory is empty
     */
    public static function isDirectoryEmpty($path)
    {
        if (!is_readable($path)) {
            return null;
        }
        return (count(scandir($path)) == 2);
    }

/**
     * Size of the directory recursively in bytes
     *
     * @param string $path The full path to a system directory
     *
     * @return int Returns the size of the directory in bytes
     */
    public static function getDirectorySize($path)
    {
        if (!file_exists($path)) {
            return 0;
        }
        if (is_file($path)) {
            return filesize($path);
        }

$size = 0;
        $list = glob($path . "/*");
        if (!empty($list)) {
            foreach ($list as $file) {
                $size += self::getDirectorySize($file);
            }
        }
        return $size;
    }

/**
     * Can shell_exec be called on this server
     *
     * @return bool Returns true if shell_exec can be called on server
     */
    public static function hasShellExec()
    {
        $cmds = array('shell_exec', 'escapeshellarg', 'escapeshellcmd', 'extension_loaded');

//Function disabled at server level
        if (array_intersect($cmds, array_map('trim', explode(',', @ini_get('disable_functions'))))) {
            return apply_filters('duplicator_is_shellzip_available', false);
        }

//Suhosin: http://www.hardened-php.net/suhosin/
        //Will cause PHP to silently fail
        if (extension_loaded('suhosin')) {
            $suhosin_ini = @ini_get("suhosin.executor.func.blacklist");
            if (array_intersect($cmds, array_map('trim', explode(',', $suhosin_ini)))) {
                return apply_filters('duplicator_is_shellzip_available', false);
            }
        }

if (! function_exists('shell_exec')) {
            return apply_filters('duplicator_is_shellzip_available', false);
        }

// Can we issue a simple echo command?
        if (!@shell_exec('echo duplicator')) {
            return apply_filters('duplicator_is_shellzip_available', false);
        }

return apply_filters('duplicator_is_shellzip_available', true);
    }

/**
     * Is the server running Windows operating system
     *
     * @return bool Returns true if operating system is Windows
     */
    public static function isWindows()
    {
        if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
            return true;
        }
        return false;
    }

/**
     * Wrap to prevent malware scanners from reporting false/positive
     * Switched from our old method to avoid WordFence reporting a false positive
     *
     * @param string $string The string to decrypt i.e. base64_decode
     *
     * @return string Returns the string base64 decoded
     */
    public static function installerUnscramble($string)
    {
        return base64_decode($string);
    }

/**
     * Wrap to prevent malware scanners from reporting false/positive
     * Switched from our old method to avoid WordFence reporting a false positive
     *
     * @param string $string The string to decrypt i.e. base64_encode
     *
     * @return string Returns the string base64 encode
     */
    public static function installerScramble($string)
    {
        return base64_encode($string);
    }
    const SECURE_ISSUE_DIE    = 'die';
    const SECURE_ISSUE_THROW  = 'throw';
    const SECURE_ISSUE_RETURN = 'return';

/**
     * Does the current user have the capability
     *
     * @param type $permission
     * @param type $exit    //  SECURE_ISSUE_DIE die script with die function
     *                          SECURE_ISSUE_THROW throw an exception if fail
     *                          SECURE_ISSUE_RETURN return false if fail
     *
     * @return boolean      // return false is fail and $exit is SECURE_ISSUE_THROW
     *                      // true if success
     *
     * @throws Exception    // thow exception if $exit is SECURE_ISSUE_THROW
     */
    public static function hasCapability($permission = 'read', $exit = self::SECURE_ISSUE_DIE)
    {
        $capability = apply_filters('wpfront_user_role_editor_duplicator_translate_capability', $permission);

if (!current_user_can($capability)) {
            $exitMsg = __('You do not have sufficient permissions to access this page.', 'duplicator');
            DUP_LOG::Trace('You do not have sufficient permissions to access this page. PERMISSION: ' . $permission);

switch ($exit) {
                case self::SECURE_ISSUE_THROW:
                    throw new Exception($exitMsg);
                case self::SECURE_ISSUE_RETURN:
                    return false;
                case self::SECURE_ISSUE_DIE:
                default:
                    wp_die($exitMsg);
            }
        }
        return true;
    }

/**
     *  Gets the name of the owner of the current PHP script
     *
     * @return string The name of the owner of the current PHP script
     */
    public static function getCurrentUser()
    {
        $unreadable = 'Undetectable';
        if (function_exists('get_current_user') && is_callable('get_current_user')) {
            $user = get_current_user();
            return strlen($user) ? $user : $unreadable;
        }
        return $unreadable;
    }

/**
     * Gets the owner of the PHP process
     *
     * @return string Gets the owner of the PHP process
     */
    public static function getProcessOwner()
    {
        $unreadable = 'Undetectable';
        $user       = '';
        try {
            if (function_exists('exec')) {
                $user = @exec('whoami');
            }

if (!strlen($user) && function_exists('posix_getpwuid') && function_exists('posix_geteuid')) {
                $user = posix_getpwuid(posix_geteuid());
                $user = $user['name'];
            }

return strlen($user) ? $user : $unreadable;
        } catch (Exception $ex) {
            return $unreadable;
        }
    }

/**
     * Creates the snapshot directory if it doesn't already exist
     *
     * @return bool
     */
    public static function initSnapshotDirectory()
    {
        $error = false;

$path_wproot = duplicator_get_abs_path();
        $path_ssdir  = DUP_Settings::getSsdirPath();

if (!file_exists($path_ssdir)) {
            $old_root_perm = @fileperms($path_wproot);

//--------------------------------
            //CHMOD DIRECTORY ACCESS
            //wordpress root directory
            SnapIO::chmod($path_wproot, 'u+rwx');

//snapshot directory
            if (SnapIO::dirWriteCheckOrMkdir($path_ssdir, 'u+rwx,go+rx') == false) {
                $error = true;
            }

// restore original root perms
            SnapIO::chmod($path_wproot, $old_root_perm);

if ($error) {
                return false;
            }
        }

SnapIO::chmod($path_ssdir, 'u+rwx,go+rx');
        SnapIO::dirWriteCheckOrMkdir(DUP_Settings::getSsdirTmpPath(), 'u+rwx');
        SnapIO::createSilenceIndex(DUP_Settings::getSsdirTmpPath());

//--------------------------------
        //FILE CREATION & HARDEN PROCESS
        //index.php, .htaccess, robots.txt
        SnapIO::createSilenceIndex(DUP_Settings::getSsdirPath());
        self::setupBackupDirRobotsFile();
        self::setupBackupDirHtaccess();
        self::performHardenProcesses();
        // For old installations
        SnapIO::createSilenceIndex(DUP_Settings::getSsdirInstallerPath());

return true;
    }

/**
     * Attempts to create a secure .htaccess file in the download directory
     *
     * @return void
     */
    protected static function setupBackupDirHtaccess()
    {
        try {
            $storageHtaccessOff = DUP_Settings::Get('storage_htaccess_off');
            $fileName           = DUP_Settings::getSsdirPath() . '/.htaccess';

if ($storageHtaccessOff) {
                @unlink($fileName);
            } elseif (!file_exists($fileName)) {
                $fileContent = <<<HTACCESS
# Duplicator config, In case of file downloading problem, you can disable/enable it at Duplicator > Settings > Storage > Apache .htaccess

Options -Indexes
<Files *.php>
    deny from all
</Files>
<IfModule mod_headers.c>
    <FilesMatch "\.(daf)$">
        ForceType application/octet-stream
        Header set Content-Disposition attachment
    </FilesMatch>
</IfModule>
HTACCESS;
                if (file_put_contents($fileName, $fileContent) === false) {
                    throw new Exception('Can\'t create .haccess');
                }
            }
        } catch (Exception $ex) {
            DUP_Log::Trace("Unable create file htaccess {$fileName} msg:" . $ex->getMessage());
        }
    }

/**
    * Attempts to create a robots.txt file in the backups directory
    * to prevent search engines
    *
    * @return void
    */
    protected static function setupBackupDirRobotsFile()
    {
        try {
            $fileName = DUP_Settings::getSsdirPath() . '/robots.txt';
            if (!file_exists($fileName)) {
                $fileContent = <<<HTACCESS
User-agent: *
Disallow: /
HTACCESS;
                if (file_put_contents($fileName, $fileContent) === false) {
                    throw new Exception('Can\'t create .haccess');
                }
            }
        } catch (Exception $ex) {
            DUP_Log::Trace("Unable create robots.txt {$fileName} msg:" . $ex->getMessage());
        }
    }

/**
    * Run various secure processes to harden the backups dir
    *
    * @return void
    */
    public static function performHardenProcesses()
    {
        $backupsDir = DUP_Settings::getSsdirPath();

//Edge Case: Remove any main.installer.php files
        $dupInstallFile = "{$backupsDir}/dup-installer/main.installer.php";
        if (file_exists($dupInstallFile)) {
            SnapIO::chmod($dupInstallFile, "a+w");
            SnapIO::unlink("{$dupInstallFile}");
        }

//Rename installer php files to .bak
        SnapIO::regexGlobCallback(
            $backupsDir,
            function ($path) {
                $parts   = pathinfo($path);
                $newPath = $parts['dirname'] . '/' . $parts['filename'] . DUP_Installer::INSTALLER_SERVER_EXTENSION;
                SnapIO::rename($path, $newPath);
            },
            array(
                'regexFile'     => '/^.+_installer.*\.php$/',
                'regexFolder'   => false,
                'recursive'     => true,
            )
        );
    }

/**
     * Attempts to get the file zip path on a users system
     *
     * @return null
     */
    public static function getZipPath()
    {
        $filepath = null;

if (self::hasShellExec()) {
            if (shell_exec('hash zip 2>&1') == null) {
                $filepath = 'zip';
            } else {
                $possible_paths = array(
                    '/usr/bin/zip',
                    '/opt/local/bin/zip'
                    //'C:/Program\ Files\ (x86)/GnuWin32/bin/zip.exe');
                );

foreach ($possible_paths as $path) {
                    if (@file_exists($path)) {
                        $filepath = $path;
                        break;
                    }
                }
            }
        }

return $filepath;
    }

/**
     * Is the server PHP 5.3 or better
     *
     * @return bool    Returns true if the server PHP 5.3 or better
     */
    public static function PHP53()
    {
        return version_compare(PHP_VERSION, '5.3.2', '>=');
    }

/**
     * Returns an array of the WordPress core tables.
     *
     * @return array  Returns all WP core tables
     */
    public static function getWPCoreTables()
    {
        global $wpdb;
        $result = array();
        foreach (self::getWPCoreTablesEnd() as $tend) {
            $result[] = $wpdb->prefix . $tend;
        }
        return $result;
    }

public static function getWPCoreTablesEnd()
    {
        return array(
            'commentmeta',
            'comments',
            'links',
            'options',
            'postmeta',
            'posts',
            'term_relationships',
            'term_taxonomy',
            'termmeta',
            'terms',
            'usermeta',
            'blogs',
            'blog_versions',
            'blogmeta',
            'users',
            'site',
            'sitemeta',
            'signups',
            'registration_log',
            'blog_versions');
    }

public static function isWPCoreTable($table)
    {
        global $wpdb;

if (strpos($table, $wpdb->prefix) !== 0) {
            return false;
        }

$subTName = substr($table, strlen($wpdb->prefix));
        $coreEnds = self::getWPCoreTablesEnd();

if (in_array($subTName, $coreEnds)) {
            return true;
        } elseif (is_multisite()) {
            $exTable = explode('_', $subTName);
            if (count($exTable) >= 2 && is_numeric($exTable[0])) {
                $tChekc = implode('_', array_slice($exTable, 1));
                if (get_blog_details((int) $exTable[0], false) !== false && in_array($tChekc, $coreEnds)) {
                    return true;
                }
            }
        }

return false;
    }

public static function getWPBlogIdTable($table)
    {
        global $wpdb;

if (!is_multisite() || strpos($table, $wpdb->prefix) !== 0) {
            return 0;
        }

$subTName = substr($table, strlen($wpdb->prefix));
        $exTable  = explode('_', $subTName);
        if (count($exTable) >= 2 && is_numeric($exTable[0]) && get_blog_details((int) $exTable[0], false) !== false) {
            return (int) $exTable[0];
        } else {
            return 0;
        }
    }

/**
     * Check given table is exist in real
     *
     * @param $table string Table name
     *
     * @return bool
     */
    public static function isTableExists($table)
    {
        global $wpdb;
        // It will clear the $GLOBALS['wpdb']->last_error var
        $wpdb->flush();
        $table = esc_sql($table);
        $sql   = "SELECT 1 FROM `{$table}` LIMIT 1;";

$wpdb->get_var($sql);
        if (empty($wpdb->last_error)) {
            return true;
        }
        return false;
    }

/**
     * Finds if its a valid executable or not
     *
     * @param string $cmd $exe A non zero length executable path to find if that is executable or not.
     *
     * @return boolean
     */
    public static function isExecutable($cmd)
    {
        if (strlen($cmd) < 1) {
            return false;
        }

if (@is_executable($cmd)) {
            return true;
        }

$output = shell_exec($cmd);
        if (!is_null($output)) {
            return true;
        }

$output = shell_exec($cmd . ' -?');
        if (!is_null($output)) {
            return true;
        }

return false;
    }

/**
     * Display human readable byte sizes
     *
     * @param string $size  The size in bytes
     *
     * @return string Human readable bytes such as 50MB, 1GB
     */
    public static function readableByteSize($size)
    {
        try {
            $units = array('B', 'KB', 'MB', 'GB', 'TB');
            for ($i = 0; $size >= 1024 && $i < 4; $i++) {
                $size /= 1024;
            }
            return round($size, 2) . $units[$i];
        } catch (Exception $e) {
            return "n/a";
        }
    }

public static function getTablePrefix()
    {
        global $wpdb;
        $tablePrefix = (is_multisite() && is_plugin_active_for_network('duplicator/duplicator.php')) ? $wpdb->base_prefix : $wpdb->prefix;
        return $tablePrefix;
    }

/**
     * return ini disable functions array
     *
     * @return array
     */
    public static function getIniDisableFuncs()
    {
        if (is_null(self::$iniDisableFuncs)) {
            $tmpFuncs              = ini_get('disable_functions');
            $tmpFuncs              = explode(',', $tmpFuncs);
            self::$iniDisableFuncs = array();
            foreach ($tmpFuncs as $cFunc) {
                self::$iniDisableFuncs[] = trim($cFunc);
            }
        }

return self::$iniDisableFuncs;
    }

/**
     * Check if function exists and isn't in ini disable_functions
     *
     * @param string $function_name
     *
     * @return bool
     */
    public static function isIniFunctionEnalbe($function_name)
    {
        return function_exists($function_name) && !in_array($function_name, self::getIniDisableFuncs());
    }
}

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