ci-bonfire / Sprint

system/helpers/string_helper.php

<?php

For compatibility and reusability of your code, PSR1 recommends that a file should introduce either new symbols (like classes, functions, etc.) or have side-effects (like outputting something, or including other files), but not both at the same time. The first symbol is defined on line 71 and the first side effect is on line 38.

/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014 - 2015, 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. (http://ellislab.com/)
 * @copyright	Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
 * @license	http://opensource.org/licenses/MIT	MIT License
 * @link	http://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		http://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("'",""","'","""), $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
	 *
	 * Useful for generating passwords or hashes.
	 *
	 * @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) : '';
	}
}