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sourceforge/freenetis/branches/testing/application/helpers/text.php @ 1278

<?php defined('SYSPATH') or die('No direct script access.');
/**
* Text helper class.
*
* $Id: text.php 1762 2008-01-21 10:59:41Z PugFish $
*
* @package Text Helper
* @author Kohana Team
* @copyright (c) 2007-2008 Kohana Team
* @license http://kohanaphp.com/license.html
*/
class text {

/**
* Limits a phrase to a given number of words.
*
* @param string phrase to limit words of
* @param integer number of words to limit to
* @param string end character or entity
* @return string
*/
public static function limit_words($str, $limit = 100, $end_char = NULL)
{
$limit = (int) $limit;
$end_char = ($end_char === NULL) ? '&#8230;' : $end_char;

if (trim($str) == '')
return $str;

if ($limit <= 0)
return $end_char;

preg_match('/^\s*+(?:\S++\s*+){1,'.$limit.'}/u', $str, $matches);

// Only attach the end character if the matched string is shorter
// than the starting string.
return rtrim($matches[0]).(strlen($matches[0]) == strlen($str) ? '' : $end_char);
}

/**
* Limits a phrase to a given number of characters.
*
* @param string phrase to limit characters of
* @param integer number of characters to limit to
* @param string end character or entity
* @param boolean enable or disable the preservation of words while limiting
* @return string
*/
public static function limit_chars($str, $limit = 100, $end_char = NULL, $preserve_words = FALSE)
{
$end_char = ($end_char === NULL) ? '&#8230;' : $end_char;

$limit = (int) $limit;

if (trim($str) == '' OR utf8::strlen($str) <= $limit)
return $str;

if ($limit <= 0)
return $end_char;

if ($preserve_words == FALSE)
{
return rtrim(utf8::substr($str, 0, $limit)).$end_char;
}

preg_match('/^.{'.($limit - 1).'}\S*/us', $str, $matches);

return rtrim($matches[0]).(strlen($matches[0]) == strlen($str) ? '' : $end_char);
}

/**
* Alternates between two or more strings.
*
* @param string strings to alternate between
* @return string
*/
public static function alternate()
{
static $i;

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

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

/**
* Generates a random string of a given type and length.
*
* @param string a type of pool, or a string of characters to use as the pool
* @param integer length of string to return
* @return string
*
* @tutorial unique - 40 character unique hash
* @tutorial alnum - alpha-numeric characters
* @tutorial alpha - alphabetical characters
* @tutorial numeric - digit characters, 0-9
* @tutorial nozero - digit characters, 1-9
*/
public static function random($type = 'alnum', $length = 8)
{
switch ($type)
{
case 'unique':
return sha1(uniqid(NULL, TRUE));
case 'alnum':
$pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
break;
case 'alpha':
$pool = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
break;
case 'numeric':
$pool = '0123456789';
break;
case 'nozero':
$pool = '123456789';
break;
default:
$pool = (string) $type;
break;
}

$str = '';
$pool_size = utf8::strlen($pool);

for ($i = 0; $i < $length; $i++)
{
$str .= utf8::substr($pool, mt_rand(0, $pool_size - 1), 1);
}

return $str;
}

/**
* Reduces multiple slashes in a string to single slashes.
*
* @param string string to reduce slashes of
* @return string
*/
public static function reduce_slashes($str)
{
return preg_replace('#(?<!:)//+#', '/', $str);
}

/**
* Replaces the given words with a string.
*
* @param string phrase to replace words in
* @param array words to replace
* @param string replacement string
* @param boolean replace words across word boundries (space, period, etc)
* @return string
*/
public static function censor($str, $badwords, $replacement = '#', $replace_partial_words = FALSE)
{
foreach ((array) $badwords as $key => $badword)
{
$badwords[$key] = str_replace('\*', '\S*?', preg_quote((string) $badword));
}

$regex = '('.implode('|', $badwords).')';

if ($replace_partial_words == TRUE)
{
// Just using \b isn't sufficient when we need to replace a badword that already contains word boundaries itself
$regex = '(?<=\b|\s|^)'.$regex.'(?=\b|\s|$)';
}

$regex = '!'.$regex.'!ui';

if (utf8::strlen($replacement) == 1)
{
$regex .= 'e';
return preg_replace($regex, 'str_repeat($replacement, utf8::strlen(\'$1\')', $str);
}

return preg_replace($regex, $replacement, $str);
}

/**
* Returns human readable sizes.
* @see Based on original functions written by:
* @see Aidan Lister: http://aidanlister.com/repos/v/function.size_readable.php
* @see Quentin Zervaas: http://www.phpriot.com/d/code/strings/filesize-format/
*
* @param integer size in bytes
* @param string a definitive unit
* @param string the return string format
* @param boolean whether to use SI prefixes or IEC
* @return string
*/
public static function bytes($bytes, $force_unit = NULL, $format = NULL, $si = TRUE)
{
// Format string
$format = ($format === NULL) ? '%01.2f %s' : (string) $format;

// IEC prefixes (binary)
if ($si == FALSE OR strpos($force_unit, 'i') !== FALSE)
{
$units = array('B', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB');
$mod = 1024;
}
// SI prefixes (decimal)
else
{
$units = array('B', 'kB', 'MB', 'GB', 'TB', 'PB');
$mod = 1000;
}

// Determine unit to use
if (($power = array_search((string) $force_unit, $units)) === FALSE)
{
$power = ($bytes > 0) ? floor(log($bytes, $mod)) : 0;
}

return sprintf($format, $bytes / pow($mod, $power), $units[$power]);
}

/**
* Prevents widow words by inserting a non-breaking space between the last two words.
* @see http://www.shauninman.com/archive/2006/08/22/widont_wordpress_plugin
*
* @param string string to remove widows from
* @return string
*/
public function widont($str)
{
$str = rtrim($str);
$space = strrpos($str, ' ');

if ($space !== FALSE)
{
$str = substr($str, 0, $space).'&nbsp;'.substr($str, $space + 1);
}

return $str;
}

/**
* Czech & Slovak diacritical chars => ASCII by dgx
* -------------------------------------------------
* WINDOWS-1250 to ASCII for diacritic chars
*
* This source file is subject to the GNU GPL license.
*
* @author David Grudl <david@grudl.com>
* @link http://davidgrudl.com/
* @copyright Copyright (c) 2006 David Grudl
* @license GNU GENERAL PUBLIC LICENSE
* @category Text
* @version 1.0
*/
public static function cs_win2ascii($s)
{
return strtr(
$s, "\xe1\xe4\xe8\xef\xe9\xec\xed\xbe\xe5\xf2\xf3\xf6\xf5" .
"\xf4\xf8\xe0\x9a\x9d\xfa\xf9\xfc\xfb\xfd\x9e\xc1\xc4\xc8\xcf\xc9" .
"\xcc\xcd\xbc\xc5\xd2\xd3\xd6\xd5\xd4\xd8\xc0\x8a\x8d\xda\xd9\xdc" .
"\xdb\xdd\x8e", "aacdeeillnoooorrstuuuuyzAACDEEILLNOOOORRSTUUUUYZ"
);

}
/**
* Czech & Slovak diacritical chars => ASCII by dgx
* -------------------------------------------------
* ISO-8859-2 to ASCII for diacritic chars
*
* This source file is subject to the GNU GPL license.
*
* @author David Grudl <david@grudl.com>
* @link http://davidgrudl.com/
* @copyright Copyright (c) 2006 David Grudl
* @license GNU GENERAL PUBLIC LICENSE
* @category Text
* @version 1.0
*/
public static function cs_iso2ascii($s)
{
return strtr(
$s, "\xe1\xe4\xe8\xef\xe9\xec\xed\xb5\xe5\xf2\xf3\xf6\xf5\xf4" .
"\xf8\xe0\xb9\xbb\xfa\xf9\xfc\xfb\xfd\xbe\xc1\xc4\xc8\xcf\xc9" .
"\xcc\xcd\xa5\xc5\xd2\xd3\xd6\xd5\xd4\xd8\xc0\xa9\xab\xda\xd9" .
"\xdc\xdb\xdd\xae",
"aacdeeillnoooorrstuuuuyzAACDEEILLNOOOORRSTUUUUYZ"
);

}
/**
* Czech & Slovak diacritical chars => ASCII by dgx
* -------------------------------------------------
* UTF-8 to ASCII for diacritic chars
*
* This source file is subject to the GNU GPL license.
*
* @author David Grudl <david@grudl.com>
* @link http://davidgrudl.com/
* @copyright Copyright (c) 2006 David Grudl
* @license GNU GENERAL PUBLIC LICENSE
* @category Text
* @version 1.0
*/
public static function cs_utf2ascii($s)
{
static $tbl = array
(
"\xc3\xa1"=>"a",
"\xc3\xa4"=>"a",
"\xc4\x8d"=>"c",
"\xc4\x8f"=>"d",
"\xc3\xa9"=>"e",
"\xc4\x9b"=>"e",
"\xc3\xad"=>"i",
"\xc4\xbe"=>"l",
"\xc4\xba"=>"l",
"\xc5\x88"=>"n",
"\xc3\xb3"=>"o",
"\xc3\xb6"=>"o",
"\xc5\x91"=>"o",
"\xc3\xb4"=>"o",
"\xc5\x99"=>"r",
"\xc5\x95"=>"r",
"\xc5\xa1"=>"s",
"\xc5\xa5"=>"t",
"\xc3\xba"=>"u",
"\xc5\xaf"=>"u",
"\xc3\xbc"=>"u",
"\xc5\xb1"=>"u",
"\xc3\xbd"=>"y",
"\xc5\xbe"=>"z",
"\xc3\x81"=>"A",
"\xc3\x84"=>"A",
"\xc4\x8c"=>"C",
"\xc4\x8e"=>"D",
"\xc3\x89"=>"E",
"\xc4\x9a"=>"E",
"\xc3\x8d"=>"I",
"\xc4\xbd"=>"L",
"\xc4\xb9"=>"L",
"\xc5\x87"=>"N",
"\xc3\x93"=>"O",
"\xc3\x96"=>"O",
"\xc5\x90"=>"O",
"\xc3\x94"=>"O",
"\xc5\x98"=>"R",
"\xc5\x94"=>"R",
"\xc5\xa0"=>"S",
"\xc5\xa4"=>"T",
"\xc3\x9a"=>"U",
"\xc5\xae"=>"U",
"\xc3\x9c"=>"U",
"\xc5\xb0"=>"U",
"\xc3\x9d"=>"Y",
"\xc5\xbd"=>"Z"
);
return strtr($s, $tbl);
}

/**
* Prints phone number in pretty format
*
* @author Michal Kliment
* @param string $number
* @param string $country_code
* @return string
*/
public static function phone_number ($number, $country_code)
{
$val = $country_code . ' ';

$length = strlen($number);

$pointer = $length % 3;

if ($pointer)
{
$val .= substr($number, 0, $pointer).' ';
}

while ($pointer < $length)
{
$val .= substr($number, $pointer, 3).' ';
$pointer +=3;
}
return $val;
}
/**
* Check if first string starts with second
*
* @author Ondřej Fibich
* @param string $str String
* @param string $start Start
* @return bool true if first string starts with second
*/
public static function starts_with($str, $start)
{
return strncmp($str, $start, mb_strlen($start)) == 0;
}
/**
* Pushes object properties into given format string
*
* @author Ondřej Fibich
* @param string $object Object to push into format
* @param string $format Format of ouput with tag in shape: {property}
* @return string Result string
*/
public static function object_format($object, $format)
{
if (isset($object) && is_object($object) && !empty($format))
{
// seach for all tags
while (preg_match("/{(\w+)}/", $format, $r))
{
$property = $r[1];
$search = '{'.$r[1].'}';
// get property
try
{
$property_val = $object->$property;
}
catch (Exception $e)
{
$property_val = '?';
}
// replace all tags
$format = str_replace($search, $property_val, $format);
}
if (!empty($format))
{
return $format;
}
}
return '???';
}


} // End text
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