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<?php defined('SYSPATH') or die('No direct script access.');
/**
* UTF8::str_ireplace
*
* @package Kohana
* @author Kohana Team
* @copyright (c) 2007-2012 Kohana Team
* @copyright (c) 2005 Harry Fuecks
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt
*/
function _str_ireplace($search, $replace, $str, & $count = NULL)
{
if (UTF8::is_ascii($search) AND UTF8::is_ascii($replace) AND UTF8::is_ascii($str))
return str_ireplace($search, $replace, $str, $count);

if (is_array($str))
{
foreach ($str as $key => $val)
{
$str[$key] = UTF8::str_ireplace($search, $replace, $val, $count);
}
return $str;
}

if (is_array($search))
{
$keys = array_keys($search);

foreach ($keys as $k)
{
if (is_array($replace))
{
if (array_key_exists($k, $replace))
{
$str = UTF8::str_ireplace($search[$k], $replace[$k], $str, $count);
}
else
{
$str = UTF8::str_ireplace($search[$k], '', $str, $count);
}
}
else
{
$str = UTF8::str_ireplace($search[$k], $replace, $str, $count);
}
}
return $str;
}

$search = UTF8::strtolower($search);
$str_lower = UTF8::strtolower($str);

$total_matched_strlen = 0;
$i = 0;

while (preg_match('/(.*?)'.preg_quote($search, '/').'/s', $str_lower, $matches))
{
$matched_strlen = strlen($matches[0]);
$str_lower = substr($str_lower, $matched_strlen);

$offset = $total_matched_strlen + strlen($matches[1]) + ($i * (strlen($replace) - 1));
$str = substr_replace($str, $replace, $offset, strlen($search));

$total_matched_strlen += $matched_strlen;
$i++;
}

$count += $i;
return $str;
}
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