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<?php
namespace Bitrix\Translate\Text;
use Bitrix\Main;
use Bitrix\Translate;
/**
* @see \Bitrix\Main\Text
*/
class StringHelper
{
// utf8 https://www.w3.org/International/questions/qa-forms-utf-8.en
public const UTF8_REGEXP = '/(?:
[\x09\x0A\x0D\x20-\x7E] # ASCII
| [\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte
| \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs
| [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte
| \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates
| \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3
| [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15
| \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16
)+/xs';
/**
* Special version of strlen.
* @param string $str String to measure.
* @param string $encoding Defines encoding used in conversion.
* @return int
*/
public static function getLength($str, $encoding = null)
{
if (Translate\Config::isUtfMode())
{
if (empty($encoding))
{
$encoding = Main\Localization\Translation::getCurrentEncoding();
}
return mb_strlen($str, $encoding);
}
return strlen($str);
}
/**
* Special version of substr.
* @param string $str String to convert.
* @param int $start Starting position.
* @param int $length Count characters to extract.
* @param string $encoding Defines encoding used in conversion.
* @return string
*/
public static function getSubstring($str, $start, $length, $encoding = null)
{
if (Translate\Config::isUtfMode())
{
if (empty($encoding))
{
$encoding = Main\Localization\Translation::getCurrentEncoding();
}
return mb_substr($str, $start, $length, $encoding);
}
return substr($str, $start, $length);
}
/**
* Special version of strpos.
* @param string $haystack String to analyze.
* @param string $needle String to find.
* @param int $offset The search offset.
* @param string $encoding Defines encoding used in conversion.
* @return bool|int
*/
public static function getPosition($haystack, $needle, $offset = 0, $encoding = null)
{
if (function_exists('mb_strpos'))
{
if (empty($encoding))
{
$encoding = Main\Localization\Translation::getCurrentEncoding();
}
return mb_strpos($haystack, $needle, $offset, $encoding);
}
return strpos($haystack, $needle, $offset);
}
/**
* Special version of strtolower.
* @param string $str String to convert.
* @param string $encoding Defines encoding used in conversion.
* @return string
*/
public static function changeCaseToLower($str, $encoding = null)
{
if (function_exists('mb_strtolower'))
{
if (empty($encoding))
{
$encoding = Main\Localization\Translation::getCurrentEncoding();
}
return mb_strtolower($str, $encoding);
}
return mb_strtolower($str);
}
/**
* Special version of strtoupper.
* @param string $str String to convert.
* @param string $encoding Defines encoding used in conversion.
* @return string
*/
public static function changeCaseToUpper($str, $encoding = null)
{
if (function_exists('mb_strtoupper'))
{
if (empty($encoding))
{
$encoding = Main\Localization\Translation::getCurrentEncoding();
}
return mb_strtoupper($str, $encoding);
}
return mb_strtoupper($str);
}
/**
* Convert special characters to HTML entities.
* @param string $string The string being converted.
* @param int $flags A bitmask mask which specify how to handle quotes.
* @param string $encoding Defines encoding used in conversion.
* @return string
*/
public static function htmlSpecialChars($string, $flags = ENT_COMPAT, $encoding = null)
{
if (empty($encoding))
{
$encoding = Main\Localization\Translation::getCurrentEncoding();
}
return htmlspecialchars($string, $flags, $encoding, true);
}
/**
* Validates UTF-8 octet sequences:
* 0xxxxxxx
* 110xxxxx 10xxxxxx
* 1110xxxx 10xxxxxx 10xxxxxx
* 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
*
* @param string $string
* @return bool
*/
public static function validateUtf8OctetSequences($string)
{
$prevBits8and7 = 0;
$isUtf = 0;
foreach (unpack("C*", $string) as $byte)
{
$hiBits8and7 = $byte & 0xC0;
if ($hiBits8and7 == 0x80)
{
if ($prevBits8and7 == 0xC0)
{
$isUtf++;
}
elseif (($prevBits8and7 & 0x80) == 0x00)
{
$isUtf--;
}
}
elseif ($prevBits8and7 == 0xC0)
{
$isUtf--;
}
$prevBits8and7 = $hiBits8and7;
}
return ($isUtf > 0);
}
/**
* Escapes symbols of "'$ in given string.
*
* @param string $str String to escape.
* @param string $enclosure Enclosure symbol " or ' and <<< for heredoc syntax.
* @param string $additional Additional symbols to escape.
*
* @return string
*/
public static function escapePhp($str, $enclosure = '"', $additional = '')
{
//Lookaround negative lookbehind (?<!ASD)
if ($enclosure === "'")
{
$str = preg_replace("/((?<![\\\\])['{$additional}]{1})/", "\\\\$1", $str);
}
elseif ($enclosure === '"')
{
// " -> \"
$str = preg_replace("/((?<![\\\\])[\"{$additional}]{1})/", "\\\\$1", $str);
// $x -> \$x
$str = preg_replace("/((?<![\\\\])[\$]{1}\w)/", "\\\\$1", $str);
}
elseif ($enclosure === '<<<')
{
// $x -> \$x
$str = preg_replace("/((?<![\\\\])[\$]{1}\w)/", "\\\\$1", $str);
}
return $str;
}
/**
* Removes escape symbols in given string.
*
* @param string $str String to unescape.
* @param string $enclosure Enclosure symbol " or '.
*
* @return string
*/
public static function unescapePhp($str, $enclosure = '"')
{
//Lookaround positive lookbehind (?<=ASD)
// (?<=[\\]+)['\"\\\$]{1}
if ($enclosure == "'")
{
$from = ["\\'"];
$to = ["'"];
}
else
{
$from = ["\\\$", "\\\""];
$to = ["\$", "\""];
}
return str_replace($from, $to, $str);
}
}