Vergleich inc/3rdparty/diff/Diff/String.php - 1.8.3 - 1.8.33

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/**

 
/**

 * The Horde_String:: class provides static methods for charset and locale
 * safe string manipulation.

 * Provides static methods for charset and locale safe string manipulation.


 *

 
 *

 * Copyright 2003-2012 Horde LLC (http://www.horde.org/)

 * Copyright 2003-2017 Horde LLC (http://www.horde.org/)

 *
 * See the enclosed file COPYING for license information (LGPL). If you
 * did not receive this file, see http://www.horde.org/licenses/lgpl21.

 
 *
 * See the enclosed file COPYING for license information (LGPL). If you
 * did not receive this file, see http://www.horde.org/licenses/lgpl21.

 
 *
 * @todo Split up in Horde_String_Multibyte for multibyte-safe methods and
 *       Horde_String_Locale for locale-safe methods.

 *
 * @author   Jan Schneider <jan@horde.org>
 * @category Horde

 *
 * @author   Jan Schneider <jan@horde.org>
 * @category Horde

Zeile 24Zeile 26
{
    /**
     * lower() cache.

 
{
    /**
     * lower() cache.

     *
     * @var array
     */
    static protected $_lowers = array();

    /**

     *
     * @var array
     */
    protected static $_lowers = array();

    /**

     * upper() cache.
     *
     * @var array
     */

 
     * upper() cache.
     *
     * @var array
     */

    static protected $_uppers = array();

    protected static $_uppers = array();


    /**
     * Converts a string from one charset to another.


    /**
     * Converts a string from one charset to another.

Zeile 52Zeile 54
     *
     * @return mixed  The converted input data.
     */

 
     *
     * @return mixed  The converted input data.
     */

    static public function convertCharset($input, $from, $to, $force = false)

    public static function convertCharset($input, $from, $to, $force = false)

    {
        /* Don't bother converting numbers. */
        if (is_numeric($input)) {

    {
        /* Don't bother converting numbers. */
        if (is_numeric($input)) {

Zeile 71Zeile 73

        if (is_array($input)) {
            $tmp = array();

 

        if (is_array($input)) {
            $tmp = array();

            reset($input);
            while (list($key, $val) = each($input)) {

            foreach ($input as $key => $val) {


                $tmp[self::_convertCharset($key, $from, $to)] = self::convertCharset($val, $from, $to, $force);
            }
            return $tmp;

 
                $tmp[self::_convertCharset($key, $from, $to)] = self::convertCharset($val, $from, $to, $force);
            }
            return $tmp;

        }

        }


        if (is_object($input)) {
            // PEAR_Error/Exception objects are almost guaranteed to contain


        if (is_object($input)) {
            // PEAR_Error/Exception objects are almost guaranteed to contain

Zeile 87Zeile 88
                return '';
            }


 
                return '';
            }


            $input = Horde_Util::cloneObject($input);

            $input = clone $input;

            $vars = get_object_vars($input);

 
            $vars = get_object_vars($input);

            while (list($key, $val) = each($vars)) {

            foreach ($vars as $key => $val) {

                $input->$key = self::convertCharset($val, $from, $to, $force);
            }
            return $input;

                $input->$key = self::convertCharset($val, $from, $to, $force);
            }
            return $input;

Zeile 100Zeile 101
        }

        return self::_convertCharset($input, $from, $to);

 
        }

        return self::_convertCharset($input, $from, $to);

    }


    }


    /**
     * Internal function used to do charset conversion.
     *

    /**
     * Internal function used to do charset conversion.
     *

Zeile 111Zeile 112
     *
     * @return string  The converted string.
     */

 
     *
     * @return string  The converted string.
     */

    static protected function _convertCharset($input, $from, $to)

    protected static function _convertCharset($input, $from, $to)

    {
        /* Use utf8_[en|de]code() if possible and if the string isn't too
         * large (less than 16 MB = 16 * 1024 * 1024 = 16777216 bytes) - these

    {
        /* Use utf8_[en|de]code() if possible and if the string isn't too
         * large (less than 16 MB = 16 * 1024 * 1024 = 16777216 bytes) - these

Zeile 156Zeile 157
            $out = @iconv($from, $to . '//TRANSLIT', $input);
            $errmsg = isset($php_errormsg);
            ini_restore('track_errors');

 
            $out = @iconv($from, $to . '//TRANSLIT', $input);
            $errmsg = isset($php_errormsg);
            ini_restore('track_errors');

            if (!$errmsg) {

            if (!$errmsg && $out !== false) {

                return $out;
            }
        }

                return $out;
            }
        }

Zeile 183Zeile 184
     *
     * @return string  The string with lowercase characters.
     */

 
     *
     * @return string  The string with lowercase characters.
     */

    static public function lower($string, $locale = false, $charset = null)

    public static function lower($string, $locale = false, $charset = null)

    {
        if ($locale) {
            if (Horde_Util::extensionExists('mbstring')) {

    {
        if ($locale) {
            if (Horde_Util::extensionExists('mbstring')) {

Zeile 219Zeile 220
     *
     * @return string  The string with uppercase characters.
     */

 
     *
     * @return string  The string with uppercase characters.
     */

    static public function upper($string, $locale = false, $charset = null)

    public static function upper($string, $locale = false, $charset = null)

    {
        if ($locale) {
            if (Horde_Util::extensionExists('mbstring')) {

    {
        if ($locale) {
            if (Horde_Util::extensionExists('mbstring')) {

Zeile 255Zeile 256
     *
     * @return string  The capitalized string.
     */

 
     *
     * @return string  The capitalized string.
     */

    static public function ucfirst($string, $locale = false, $charset = null)

    public static function ucfirst($string, $locale = false, $charset = null)

    {
        if ($locale) {
            if (is_null($charset)) {

    {
        if ($locale) {
            if (is_null($charset)) {

Zeile 285Zeile 286
     *
     * @return string  The capitalized string.
     */

 
     *
     * @return string  The capitalized string.
     */

    static public function ucwords($string, $locale = false, $charset = null)

    public static function ucwords($string, $locale = false, $charset = null)

    {
        $words = preg_split('/(\s+)/', $string, -1, PREG_SPLIT_DELIM_CAPTURE);
        for ($i = 0, $c = count($words); $i < $c; $i += 2) {

    {
        $words = preg_split('/(\s+)/', $string, -1, PREG_SPLIT_DELIM_CAPTURE);
        for ($i = 0, $c = count($words); $i < $c; $i += 2) {

Zeile 306Zeile 307
     *
     * @return string  The string's part.
     */

 
     *
     * @return string  The string's part.
     */

    static public function substr($string, $start, $length = null,

    public static function substr($string, $start, $length = null,

                                  $charset = 'UTF-8')
    {
        if (is_null($length)) {
            $length = self::length($string, $charset) - $start;
        }


 
                                  $charset = 'UTF-8')
    {
        if (is_null($length)) {
            $length = self::length($string, $charset) - $start;
        }


        if ($length == 0) {

        if ($length === 0) {

            return '';
        }

 
            return '';
        }

 

        $error = false;


        /* Try mbstring. */
        if (Horde_Util::extensionExists('mbstring')) {


        /* Try mbstring. */
        if (Horde_Util::extensionExists('mbstring')) {

Zeile 323Zeile 326

            /* mb_substr() returns empty string on failure. */
            if (strlen($ret)) {

 

            /* mb_substr() returns empty string on failure. */
            if (strlen($ret)) {

                return $ret;

                return $ret;

            }

 
            }

 
            $error = true;

        }

        /* Try iconv. */
        if (Horde_Util::extensionExists('iconv')) {

 
        }

        /* Try iconv. */
        if (Horde_Util::extensionExists('iconv')) {

            $ret = @iconv_substr($string, $start, $length, $charset);


            $ret = @iconv_substr($string, $start, $length, $charset);


            /* iconv_substr() returns false on failure. */

 
            /* iconv_substr() returns false on failure. */

            if ($ret !== false) {

            if ($ret !== false) {

                return $ret;
            }

 
                return $ret;
            }

 
            $error = true;

        }


 
        }


        return substr($string, $start, $length);






















        /* Try intl. */
        if (Horde_Util::extensionExists('intl')) {
            $ret = self::convertCharset(
                @grapheme_substr(
                    self::convertCharset($string, $charset, 'UTF-8'),
                    $start,
                    $length
                ),
                'UTF-8',
                $charset
            );

            /* grapheme_substr() returns false on failure. */
            if ($ret !== false) {
                return $ret;
            }
            $error = true;
        }

        return $error
            ? ''
            : substr($string, $start, $length);

    }

    /**

    }

    /**

Zeile 349Zeile 375
     *
     * @return integer  The string's length.
     */

 
     *
     * @return integer  The string's length.
     */

    static public function length($string, $charset = 'UTF-8')

    public static function length($string, $charset = 'UTF-8')

    {
        $charset = self::lower($charset);


    {
        $charset = self::lower($charset);


Zeile 362Zeile 388
            if (!empty($ret)) {
                return $ret;
            }

 
            if (!empty($ret)) {
                return $ret;
            }

 
        }
        if (Horde_Util::extensionExists('intl')) {
            return grapheme_strlen(
                self::convertCharset($string, $charset, 'UTF-8')
            );

        }

        return strlen($string);

        }

        return strlen($string);

Zeile 369Zeile 400

    /**
     * Returns the numeric position of the first occurrence of $needle

 

    /**
     * Returns the numeric position of the first occurrence of $needle

     * in the $haystack string.
     *

     * in the $haystack string.
     *

     * @param string $haystack  The string to search through.
     * @param string $needle    The string to search for.

 
     * @param string $haystack  The string to search through.
     * @param string $needle    The string to search for.

     * @param integer $offset   Allows to specify which character in haystack
     *                          to start searching.
     * @param string $charset   The charset to use when searching for the
     *                          $needle string.

     * @param integer $offset   Character in $haystack to start searching at.
     * @param string $charset   Charset of $needle.



     *
     * @return integer  The position of first occurrence.

 
     *
     * @return integer  The position of first occurrence.

     */
    static public function pos($haystack, $needle, $offset = 0,
                               $charset = 'UTF-8')
    {
        if (Horde_Util::extensionExists('mbstring')) {
            $track_errors = ini_set('track_errors', 1);
            $ret = @mb_strpos($haystack, $needle, $offset, self::_mbstringCharset($charset));
            ini_set('track_errors', $track_errors);
            if (!isset($php_errormsg)) {
                return $ret;
            }
        }

        return strpos($haystack, $needle, $offset);



















































     */
    public static function pos(
        $haystack, $needle, $offset = 0, $charset = 'UTF-8'
    )
    {
        return self::_pos($haystack, $needle, $offset, $charset, 'strpos');
    }

    /**
     * Returns the numeric position of the first case-insensitive occurrence
     * of $needle in the $haystack string.
     *
     * @since 2.5.0
     *
     * @param string $haystack  The string to search through.
     * @param string $needle    The string to search for.
     * @param integer $offset   Character in $haystack to start searching at.
     * @param string $charset   Charset of $needle.
     *
     * @return integer  The position of first case-insensitive occurrence.
     */
    public static function ipos(
        $haystack, $needle, $offset = 0, $charset = 'UTF-8'
    )
    {
        return self::_pos($haystack, $needle, $offset, $charset, 'stripos');
    }

    /**
     * Returns the numeric position of the last occurrence of $needle
     * in the $haystack string.
     *
     * @param string $haystack  The string to search through.
     * @param string $needle    The string to search for.
     * @param integer $offset   Character in $haystack to start searching at.
     * @param string $charset   Charset of $needle.
     *
     * @return integer  The position of last occurrence.
     */
    public static function rpos(
        $haystack, $needle, $offset = 0, $charset = 'UTF-8'
    )
    {
        return self::_pos($haystack, $needle, $offset, $charset, 'strrpos');
    }

    /**
     * Returns the numeric position of the last case-insensitive occurrence of
     * $needle in the $haystack string.
     *
     * @since 2.5.0
     *
     * @param string $haystack  The string to search through.
     * @param string $needle    The string to search for.
     * @param integer $offset   Character in $haystack to start searching at.
     * @param string $charset   Charset of $needle.
     *
     * @return integer  The position of last case-insensitive occurrence.
     */
    public static function ripos(
        $haystack, $needle, $offset = 0, $charset = 'UTF-8'
    )
    {
        return self::_pos($haystack, $needle, $offset, $charset, 'strripos');

    }

    /**

 
    }

    /**

     * Returns the numeric position of the last occurrence of $needle
     * in the $haystack string.

     * Perform string position searches.


     *
     * @param string $haystack  The string to search through.

 
     *
     * @param string $haystack  The string to search through.

     * @param string $needle    The string to search for.
     * @param integer $offset   Allows to specify which character in haystack
     *                          to start searching.
     * @param string $charset   The charset to use when searching for the
     *                          $needle string.


     * @param string $needle    The string to search for.
     * @param integer $offset   Character in $haystack to start searching at.
     * @param string $charset   Charset of $needle.
     * @param string $func      Function to use.
     *
     * @return integer  The position of occurrence.

     *

 
     *

     * @return integer  The position of first occurrence.

 
     */

 
     */

    static public function rpos($haystack, $needle, $offset = 0,
                                $charset = 'UTF-8')


    protected static function _pos(
        $haystack, $needle, $offset, $charset, $func
    )

    {
        if (Horde_Util::extensionExists('mbstring')) {

 
    {
        if (Horde_Util::extensionExists('mbstring')) {

 
            unset($php_errormsg);
            $track_errors = ini_set('track_errors', 1);
            $ret = @call_user_func('mb_' . $func, $haystack, $needle, $offset, self::_mbstringCharset($charset));
            ini_set('track_errors', $track_errors);
            if (!isset($php_errormsg)) {
                return $ret;
            }
        }

        if (Horde_Util::extensionExists('intl')) {
            unset($php_errormsg);

            $track_errors = ini_set('track_errors', 1);

 
            $track_errors = ini_set('track_errors', 1);

            $ret = @mb_strrpos($haystack, $needle, $offset, self::_mbstringCharset($charset));










            $ret = self::convertCharset(
                @call_user_func(
                    'grapheme_' . $func,
                    self::convertCharset($haystack, $charset, 'UTF-8'),
                    self::convertCharset($needle, $charset, 'UTF-8'),
                    $offset
                ),
                'UTF-8',
                $charset
            );

            ini_set('track_errors', $track_errors);
            if (!isset($php_errormsg)) {
                return $ret;
            }

 
            ini_set('track_errors', $track_errors);
            if (!isset($php_errormsg)) {
                return $ret;
            }

        }

        }



 


        return strrpos($haystack, $needle, $offset);

        return $func($haystack, $needle, $offset);

    }

    /**

    }

    /**

Zeile 438Zeile 537
     *
     * @return string  The padded string.
     */

 
     *
     * @return string  The padded string.
     */

    static public function pad($input, $length, $pad = ' ',

    public static function pad($input, $length, $pad = ' ',

                               $type = STR_PAD_RIGHT, $charset = 'UTF-8')
    {
        $mb_length = self::length($input, $charset);

                               $type = STR_PAD_RIGHT, $charset = 'UTF-8')
    {
        $mb_length = self::length($input, $charset);

Zeile 473Zeile 572
            $right = $length - $mb_length;
            $output = $input . self::substr(str_repeat($pad, ceil($right / $pad_length)), 0, $right, $charset);
            break;

 
            $right = $length - $mb_length;
            $output = $input . self::substr(str_repeat($pad, ceil($right / $pad_length)), 0, $right, $charset);
            break;

        }


        }


        return $output;
    }

    /**
     * Wraps the text of a message.

 
        return $output;
    }

    /**
     * Wraps the text of a message.

     *

     *

     * @param string $string         String containing the text to wrap.
     * @param integer $width         Wrap the string at this number of
     *                               characters.

     * @param string $string         String containing the text to wrap.
     * @param integer $width         Wrap the string at this number of
     *                               characters.

Zeile 494Zeile 593
     *
     * @return string  String containing the wrapped text.
     */

 
     *
     * @return string  String containing the wrapped text.
     */

    static public function wordwrap($string, $width = 75, $break = "\n",

    public static function wordwrap($string, $width = 75, $break = "\n",

                                    $cut = false, $line_folding = false)
    {

 
                                    $cut = false, $line_folding = false)
    {

 
        $breakRegex = '(?:' . preg_quote($break) . ')';
        $rpos = self::rpos($break, "\n");
        if ($rpos === false) {
            $rpos = 0;
        } else {
            $rpos++;
        }

        $wrapped = '';

 
        $wrapped = '';

 
        $hasWrapped = false;


        while (self::length($string, 'UTF-8') > $width) {

 

        while (self::length($string, 'UTF-8') > $width) {

            $line = self::substr($string, 0, $width, 'UTF-8');

            $line = self::substr($string, 0, $width + ($hasWrapped ? $rpos : 0), 'UTF-8');

            $string = self::substr($string, self::length($line, 'UTF-8'), null, 'UTF-8');

            // Make sure we didn't cut a word, unless we want hard breaks

            $string = self::substr($string, self::length($line, 'UTF-8'), null, 'UTF-8');

            // Make sure we didn't cut a word, unless we want hard breaks

Zeile 508Zeile 615
            if (!$cut && preg_match('/^(.+?)((\s|\r?\n).*)/us', $string, $match)) {
                $line .= $match[1];
                $string = $match[2];

 
            if (!$cut && preg_match('/^(.+?)((\s|\r?\n).*)/us', $string, $match)) {
                $line .= $match[1];
                $string = $match[2];

            }


            }


            // Wrap at existing line breaks.

 
            // Wrap at existing line breaks.

            if (preg_match('/^(.*?)(\r?\n)(.*)$/su', $line, $match)) {


            $regex = '/^(' . ($hasWrapped ? $breakRegex : '') . '.*?)(\r?\n)(.*)$/us';
            if (preg_match($regex, $line, $match)) {

                $wrapped .= $match[1] . $match[2];
                $string = $match[3] . $string;

 
                $wrapped .= $match[1] . $match[2];
                $string = $match[3] . $string;

 
                $hasWrapped = false;

                continue;
            }

            // Wrap at the last colon or semicolon followed by a whitespace if
            // doing line folding.
            if ($line_folding &&

 
                continue;
            }

            // Wrap at the last colon or semicolon followed by a whitespace if
            // doing line folding.
            if ($line_folding &&

                preg_match('/^(.*?)(;|:)(\s+.*)$/u', $line, $match)) {
                $wrapped .= $match[1] . $match[2] . $break;
                $string = $match[3] . $string;


                preg_match('/^(.*?)(;|:)(\s+.*)$/us', $line, $match)) {
                $wrapped .= $match[1] . $match[2];
                $string = $break . $match[3] . $string;
                $hasWrapped = true;

                continue;
            }

            // Wrap at the last whitespace of $line.
            $sub = $line_folding

 
                continue;
            }

            // Wrap at the last whitespace of $line.
            $sub = $line_folding

                ? '(.+[^\s])'
                : '(.*)';

                ? '(' . ($hasWrapped ? $breakRegex : '') . '.+[^\s])'
                : '(' . ($hasWrapped ? $breakRegex : '') . '.*)';


            if (preg_match('/^' . $sub . '(\s+)(.*)$/u', $line, $match)) {

 

            if (preg_match('/^' . $sub . '(\s+)(.*)$/u', $line, $match)) {

                $wrapped .= $match[1] . $break;
                $string = ($line_folding ? $match[2] : '') . $match[3] . $string;



                $wrapped .= $match[1];
                $string = $break . ($line_folding ? $match[2] : '')
                    . $match[3] . $string;
                $hasWrapped = true;

                continue;
            }

            // Hard wrap if necessary.
            if ($cut) {

 
                continue;
            }

            // Hard wrap if necessary.
            if ($cut) {

                $wrapped .= $line . $break;



                $wrapped .= $line;
                $string = $break . $string;
                $hasWrapped = true;

                continue;
            }

            $wrapped .= $line;

 
                continue;
            }

            $wrapped .= $line;

 
            $hasWrapped = false;

        }

        return $wrapped . $string;

        }

        return $wrapped . $string;

Zeile 562Zeile 677
     *
     * @return string  String containing the wrapped text.
     */

 
     *
     * @return string  String containing the wrapped text.
     */

    static public function wrap($text, $length = 80, $break_char = "\n",

    public static function wrap($text, $length = 80, $break_char = "\n",

                                $quote = false)
    {
        $paragraphs = array();

                                $quote = false)
    {
        $paragraphs = array();

Zeile 594Zeile 709
     *
     * @return string  The truncated string, if longer than $length.
     */

 
     *
     * @return string  The truncated string, if longer than $length.
     */

    static public function truncate($text, $length = 100)

    public static function truncate($text, $length = 100)

    {
        return (self::length($text) > $length)
            ? rtrim(self::substr($text, 0, $length - 3)) . '...'

    {
        return (self::length($text) > $length)
            ? rtrim(self::substr($text, 0, $length - 3)) . '...'

Zeile 610Zeile 725
     *
     * @return string  The abbreviated string, if longer than $length.
     */

 
     *
     * @return string  The abbreviated string, if longer than $length.
     */

    static public function abbreviate($text, $length = 20)

    public static function abbreviate($text, $length = 20)

    {
        return (self::length($text) > $length)
            ? rtrim(self::substr($text, 0, round(($length - 3) / 2))) . '...' . ltrim(self::substr($text, (($length - 3) / 2) * -1))

    {
        return (self::length($text) > $length)
            ? rtrim(self::substr($text, 0, round(($length - 3) / 2))) . '...' . ltrim(self::substr($text, (($length - 3) / 2) * -1))

Zeile 625Zeile 740
     *
     * @return string  The start of $str1 and $str2 that is identical in both.
     */

 
     *
     * @return string  The start of $str1 and $str2 that is identical in both.
     */

    static public function common($str1, $str2)

    public static function common($str1, $str2)

    {
        for ($result = '', $i = 0;
             isset($str1[$i]) && isset($str2[$i]) && $str1[$i] == $str2[$i];

    {
        for ($result = '', $i = 0;
             isset($str1[$i]) && isset($str2[$i]) && $str1[$i] == $str2[$i];

Zeile 644Zeile 759
     *
     * @return boolean  True if the parameter was alphabetic only.
     */

 
     *
     * @return boolean  True if the parameter was alphabetic only.
     */

    static public function isAlpha($string, $charset)

    public static function isAlpha($string, $charset)

    {
        if (!Horde_Util::extensionExists('mbstring')) {
            return ctype_alpha($string);

    {
        if (!Horde_Util::extensionExists('mbstring')) {
            return ctype_alpha($string);

Zeile 662Zeile 777
        }

        return $alpha;

 
        }

        return $alpha;

    }

    }


    /**
     * Returns true if ever character in the parameter is a lowercase letter in


    /**
     * Returns true if ever character in the parameter is a lowercase letter in

Zeile 672Zeile 787
     * @param string $charset  The charset to use when testing the string.
     *
     * @return boolean  True if the parameter was lowercase.

 
     * @param string $charset  The charset to use when testing the string.
     *
     * @return boolean  True if the parameter was lowercase.

     */
    static public function isLower($string, $charset)
    {

     */
    public static function isLower($string, $charset)
    {

        return ((self::lower($string, true, $charset) === $string) &&
                self::isAlpha($string, $charset));
    }

        return ((self::lower($string, true, $charset) === $string) &&
                self::isAlpha($string, $charset));
    }

Zeile 684Zeile 799
     * in the current locale.
     *
     * @param string $string   The string to test.

 
     * in the current locale.
     *
     * @param string $string   The string to test.

     * @param string $charset  The charset to use when testing the string.
     *

     * @param string $charset  The charset to use when testing the string.
     *

     * @return boolean  True if the parameter was uppercase.
     */

 
     * @return boolean  True if the parameter was uppercase.
     */

    static public function isUpper($string, $charset)

    public static function isUpper($string, $charset)

    {
        return ((self::upper($string, true, $charset) === $string) &&
                self::isAlpha($string, $charset));

    {
        return ((self::upper($string, true, $charset) === $string) &&
                self::isAlpha($string, $charset));

Zeile 704Zeile 819
     *
     * @return array  The matches array from the first regex that matches.
     */

 
     *
     * @return array  The matches array from the first regex that matches.
     */

    static public function regexMatch($text, $regex, $charset = null)

    public static function regexMatch($text, $regex, $charset = null)

    {
        if (!empty($charset)) {
            $regex = self::convertCharset($regex, $charset, 'utf-8');

    {
        if (!empty($charset)) {
            $regex = self::convertCharset($regex, $charset, 'utf-8');

Zeile 727Zeile 842

    /**
     * Check to see if a string is valid UTF-8.

 

    /**
     * Check to see if a string is valid UTF-8.

     *
     * @since 1.1.0

 
     *
     * @param string $text  The text to check.

 
     *
     * @param string $text  The text to check.

     *

     *

     * @return boolean  True if valid UTF-8.
     */

 
     * @return boolean  True if valid UTF-8.
     */

    static public function validUtf8($text)

    public static function validUtf8($text)

    {

 
    {

        /* Regex from:
         * http://stackoverflow.com/questions/1523460/ensuring-valid-utf-8-in-php
         */
        return preg_match('/^(?:
              [\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', $text);

























        $text = strval($text);

        // First check for illegal surrogate pair sequences. See RFC 3629.
        if (preg_match('/\xE0[\x80-\x9F][\x80-\xBF]|\xED[\xA0-\xBF][\x80-\xBF]/S', $text)) {
            return false;
        }

        for ($i = 0, $len = strlen($text); $i < $len; ++$i) {
            $c = ord($text[$i]);
            if ($c > 128) {
                if ($c > 247) {
                    // STD 63 (RFC 3629) eliminates 5 & 6-byte characters.
                    return false;
                } elseif ($c > 239) {
                    $j = 3;
                } elseif ($c > 223) {
                    $j = 2;
                } elseif ($c > 191) {
                    $j = 1;
                } else {
                    return false;
                }

                if (($i + $j) > $len) {
                    return false;
                }

                do {
                    $c = ord($text[++$i]);
                    if (($c < 128) || ($c > 191)) {
                        return false;
                    }
                } while (--$j);
            }
        }

        return true;

    }

    /**

    }

    /**

Zeile 758Zeile 895
     *
     * @return string  The charset to use with mbstring functions.
     */

 
     *
     * @return string  The charset to use with mbstring functions.
     */

    static protected function _mbstringCharset($charset)

    protected static function _mbstringCharset($charset)

    {
        /* mbstring functions do not handle the 'ks_c_5601-1987' &
         * 'ks_c_5601-1989' charsets. However, these charsets are used, for
         * example, by various versions of Outlook to send Korean characters.
         * Use UHC (CP949) encoding instead. See, e.g.,
         * http://lists.w3.org/Archives/Public/ietf-charsets/2001AprJun/0030.html */

 
    {
        /* mbstring functions do not handle the 'ks_c_5601-1987' &
         * 'ks_c_5601-1989' charsets. However, these charsets are used, for
         * example, by various versions of Outlook to send Korean characters.
         * Use UHC (CP949) encoding instead. See, e.g.,
         * http://lists.w3.org/Archives/Public/ietf-charsets/2001AprJun/0030.html */

        if ($charset == 'UTF-8' || $charset == 'utf-8') {
            return $charset;
        }
        if (in_array(self::lower($charset), array('ks_c_5601-1987', 'ks_c_5601-1989'))) {
            $charset = 'UHC';
        }

        return in_array(self::lower($charset), array('ks_c_5601-1987', 'ks_c_5601-1989'))
            ? 'UHC'
            : $charset;
    }





 


        return $charset;












    /**
     * Strip UTF-8 byte order mark (BOM) from string data.
     *
     * @param string $str  Input string (UTF-8).
     *
     * @return string  Stripped string (UTF-8).
     */
    public static function trimUtf8Bom($str)
    {
        return (substr($str, 0, 3) == pack('CCC', 239, 187, 191))
            ? substr($str, 3)
            : $str;

    }

}

    }

}