PHP Classes

File: system/Helpers/security_helper.php

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File: system/Helpers/security_helper.php
Role: Example script
Content type: text/plain
Description: Example script
Class: PHP GuestBook with Database
GuestBook application using MySQL to store posts
Author: By
Last change:
Date: 1 year ago
Size: 1,407 bytes
 

Contents

Class file image Download
<?php

/**
 * This file is part of the CodeIgniter 4 framework.
 *
 * (c) CodeIgniter Foundation <admin@codeigniter.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

use Config\Services;

/**
 * CodeIgniter Security Helpers
 */

if (! function_exists('sanitize_filename'))
{
   
/**
     * Sanitize a filename to use in a URI.
     *
     * @param string $filename
     *
     * @return string
     */
   
function sanitize_filename(string $filename): string
   
{
        return
Services::security()->sanitizeFilename($filename);
    }
}

//--------------------------------------------------------------------

if (! function_exists('strip_image_tags'))
{
   
/**
     * Strip Image Tags
     *
     * @param string $str
     *
     * @return string
     */
   
function strip_image_tags(string $str): string
   
{
        return
preg_replace([
           
'#<img[\s/]+.*?src\s*=\s*(["\'])([^\\1]+?)\\1.*?\>#i',
           
'#<img[\s/]+.*?src\s*=\s*?(([^\s"\'=<>`]+)).*?\>#i',
        ],
'\\2', $str
       
);
    }
}

//--------------------------------------------------------------------

if (! function_exists('encode_php_tags'))
{
   
/**
     * Convert PHP tags to entities
     *
     * @param string $str
     *
     * @return string
     */
   
function encode_php_tags(string $str): string
   
{
        return
str_replace(['<?', '?>'], ['&lt;?', '?&gt;'], $str);
    }
}

//--------------------------------------------------------------------