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File: system/helpers/string_helper.php

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File: system/helpers/string_helper.php
Role: Auxiliary script
Content type: text/plain
Description: Auxiliary script
Class: PHP Google Authenticator with CodeIgniter
2fa Google Authenticator implementation
Author: By
Last change:
Date: 1 year ago
Size: 7,551 bytes
 

 

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<?php
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014 - 2018, British Columbia Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @package CodeIgniter
 * @author EllisLab Dev Team
 * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
 * @copyright Copyright (c) 2014 - 2018, British Columbia Institute of Technology (http://bcit.ca/)
 * @license http://opensource.org/licenses/MIT MIT License
 * @link https://codeigniter.com
 * @since Version 1.0.0
 * @filesource
 */
defined('BASEPATH') OR exit('No direct script access allowed');

/**
 * CodeIgniter String Helpers
 *
 * @package CodeIgniter
 * @subpackage Helpers
 * @category Helpers
 * @author EllisLab Dev Team
 * @link https://codeigniter.com/user_guide/helpers/string_helper.html
 */

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

if ( ! function_exists('trim_slashes'))
{
   
/**
     * Trim Slashes
     *
     * Removes any leading/trailing slashes from a string:
     *
     * /this/that/theother/
     *
     * becomes:
     *
     * this/that/theother
     *
     * @todo Remove in version 3.1+.
     * @deprecated 3.0.0 This is just an alias for PHP's native trim()
     *
     * @param string
     * @return string
     */
   
function trim_slashes($str)
    {
        return
trim($str, '/');
    }
}

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

if ( ! function_exists('strip_slashes'))
{
   
/**
     * Strip Slashes
     *
     * Removes slashes contained in a string or in an array
     *
     * @param mixed string or array
     * @return mixed string or array
     */
   
function strip_slashes($str)
    {
        if ( !
is_array($str))
        {
            return
stripslashes($str);
        }

        foreach (
$str as $key => $val)
        {
           
$str[$key] = strip_slashes($val);
        }

        return
$str;
    }
}

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

if ( ! function_exists('strip_quotes'))
{
   
/**
     * Strip Quotes
     *
     * Removes single and double quotes from a string
     *
     * @param string
     * @return string
     */
   
function strip_quotes($str)
    {
        return
str_replace(array('"', "'"), '', $str);
    }
}

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

if ( ! function_exists('quotes_to_entities'))
{
   
/**
     * Quotes to Entities
     *
     * Converts single and double quotes to entities
     *
     * @param string
     * @return string
     */
   
function quotes_to_entities($str)
    {
        return
str_replace(array("\'","\"","'",'"'), array("&#39;","&quot;","&#39;","&quot;"), $str);
    }
}

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

if ( ! function_exists('reduce_double_slashes'))
{
   
/**
     * Reduce Double Slashes
     *
     * Converts double slashes in a string to a single slash,
     * except those found in http://
     *
     * http://www.some-site.com//index.php
     *
     * becomes:
     *
     * http://www.some-site.com/index.php
     *
     * @param string
     * @return string
     */
   
function reduce_double_slashes($str)
    {
        return
preg_replace('#(^|[^:])//+#', '\\1/', $str);
    }
}

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

if ( ! function_exists('reduce_multiples'))
{
   
/**
     * Reduce Multiples
     *
     * Reduces multiple instances of a particular character. Example:
     *
     * Fred, Bill,, Joe, Jimmy
     *
     * becomes:
     *
     * Fred, Bill, Joe, Jimmy
     *
     * @param string
     * @param string the character you wish to reduce
     * @param bool TRUE/FALSE - whether to trim the character from the beginning/end
     * @return string
     */
   
function reduce_multiples($str, $character = ',', $trim = FALSE)
    {
       
$str = preg_replace('#'.preg_quote($character, '#').'{2,}#', $character, $str);
        return (
$trim === TRUE) ? trim($str, $character) : $str;
    }
}

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

if ( ! function_exists('random_string'))
{
   
/**
     * Create a "Random" String
     *
     * @param string type of random string. basic, alpha, alnum, numeric, nozero, unique, md5, encrypt and sha1
     * @param int number of characters
     * @return string
     */
   
function random_string($type = 'alnum', $len = 8)
    {
        switch (
$type)
        {
            case
'basic':
                return
mt_rand();
            case
'alnum':
            case
'numeric':
            case
'nozero':
            case
'alpha':
                switch (
$type)
                {
                    case
'alpha':
                       
$pool = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
                        break;
                    case
'alnum':
                       
$pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
                        break;
                    case
'numeric':
                       
$pool = '0123456789';
                        break;
                    case
'nozero':
                       
$pool = '123456789';
                        break;
                }
                return
substr(str_shuffle(str_repeat($pool, ceil($len / strlen($pool)))), 0, $len);
            case
'unique': // todo: remove in 3.1+
           
case 'md5':
                return
md5(uniqid(mt_rand()));
            case
'encrypt': // todo: remove in 3.1+
           
case 'sha1':
                return
sha1(uniqid(mt_rand(), TRUE));
        }
    }
}

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

if ( ! function_exists('increment_string'))
{
   
/**
     * Add's _1 to a string or increment the ending number to allow _2, _3, etc
     *
     * @param string required
     * @param string What should the duplicate number be appended with
     * @param string Which number should be used for the first dupe increment
     * @return string
     */
   
function increment_string($str, $separator = '_', $first = 1)
    {
       
preg_match('/(.+)'.preg_quote($separator, '/').'([0-9]+)$/', $str, $match);
        return isset(
$match[2]) ? $match[1].$separator.($match[2] + 1) : $str.$separator.$first;
    }
}

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

if ( ! function_exists('alternator'))
{
   
/**
     * Alternator
     *
     * Allows strings to be alternated. See docs...
     *
     * @param string (as many parameters as needed)
     * @return string
     */
   
function alternator()
    {
        static
$i;

        if (
func_num_args() === 0)
        {
           
$i = 0;
            return
'';
        }

       
$args = func_get_args();
        return
$args[($i++ % count($args))];
    }
}

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

if ( ! function_exists('repeater'))
{
   
/**
     * Repeater function
     *
     * @todo Remove in version 3.1+.
     * @deprecated 3.0.0 This is just an alias for PHP's native str_repeat()
     *
     * @param string $data String to repeat
     * @param int $num Number of repeats
     * @return string
     */
   
function repeater($data, $num = 1)
    {
        return (
$num > 0) ? str_repeat($data, $num) : '';
    }
}