function Mbstring::mb_convert_case

5 calls to Mbstring::mb_convert_case()

Mbstring::mb_stripos in vendor/symfony/polyfill-mbstring/Mbstring.php

Mbstring::mb_strripos in vendor/symfony/polyfill-mbstring/Mbstring.php

Mbstring::mb_strtolower in vendor/symfony/polyfill-mbstring/Mbstring.php

Mbstring::mb_strtoupper in vendor/symfony/polyfill-mbstring/Mbstring.php

Mbstring::title_case in vendor/symfony/polyfill-mbstring/Mbstring.php

File

vendor/symfony/polyfill-mbstring/Mbstring.php, line 285

Class

Mbstring

Partial mbstring implementation in PHP, iconv based, UTF-8 centric.

Namespace

Symfony\Polyfill\Mbstring

Code

public static function mb_convert_case($s, $mode, $encoding = null) {
    $s = (string) $s;
    if ('' === $s) {
        return '';
    }
    $encoding = self::getEncoding($encoding);
    if ('UTF-8' === $encoding) {
        $encoding = null;
        if (!preg_match('//u', $s)) {
            $s = @iconv('UTF-8', 'UTF-8//IGNORE', $s);
        }
    }
    else {
        $s = iconv($encoding, 'UTF-8//IGNORE', $s);
    }
    if (\MB_CASE_TITLE == $mode) {
        static $titleRegexp = null;
        if (null === $titleRegexp) {
            $titleRegexp = self::getData('titleCaseRegexp');
        }
        $s = preg_replace_callback($titleRegexp, [
            __CLASS__,
            'title_case',
        ], $s);
    }
    else {
        if (\MB_CASE_UPPER == $mode) {
            static $upper = null;
            if (null === $upper) {
                $upper = self::getData('upperCase');
            }
            $map = $upper;
        }
        else {
            if (self::MB_CASE_FOLD === $mode) {
                static $caseFolding = null;
                if (null === $caseFolding) {
                    $caseFolding = self::getData('caseFolding');
                }
                $s = strtr($s, $caseFolding);
            }
            static $lower = null;
            if (null === $lower) {
                $lower = self::getData('lowerCase');
            }
            $map = $lower;
        }
        static $ulenMask = [
            "\xc0" => 2,
            "\xd0" => 2,
            "\xe0" => 3,
            "\xf0" => 4,
        ];
        $i = 0;
        $len = \strlen($s);
        while ($i < $len) {
            $ulen = $s[$i] < "\x80" ? 1 : $ulenMask[$s[$i] & "\xf0"];
            $uchr = substr($s, $i, $ulen);
            $i += $ulen;
            if (isset($map[$uchr])) {
                $uchr = $map[$uchr];
                $nlen = \strlen($uchr);
                if ($nlen == $ulen) {
                    $nlen = $i;
                    do {
                        $s[--$nlen] = $uchr[--$ulen];
                    } while ($ulen);
                }
                else {
                    $s = substr_replace($s, $uchr, $i - $ulen, $ulen);
                    $len += $nlen - $ulen;
                    $i += $nlen - $ulen;
                }
            }
        }
    }
    if (null === $encoding) {
        return $s;
    }
    return iconv('UTF-8', $encoding . '//IGNORE', $s);
}