voku\helper\UTF8::substr()

Complexity

Conditions	12
Paths	37

Size

Total Lines	57
Code Lines	26

Duplication

Lines	11
Ratio	19.3 %

Code Coverage

Tests	36
CRAP Score	12.0208

Importance

Changes	9
Bugs	2	Features	1

<?php
  public static function substr($str, $start = 0, $length = null, $encoding = 'UTF-8', $cleanUtf8 = false)
  {
    $str = (string)$str;

    if (!isset($str[0])) {
      return '';
    }

    // init
    self::checkForSupport();

    if ($cleanUtf8 === true) {
      // iconv and mbstring are not tolerant to invalid encoding
      // further, their behaviour is inconsistent with that of PHP's substr

      $str = self::clean($str);
    }

    $str_length = 0;
    if ($start || $length === null) {
      $str_length = (int)self::strlen($str);
    }

    if ($start && $start > $str_length) {
      return false;
    }

    if ($length === null) {
      $length = $str_length;
    } else {
      $length = (int)$length;
    }

    if (self::$support['mbstring'] === true) {

This code seems to be duplicated across your project.

      // INFO: this is only a fallback for old versions
      if ($encoding === true || $encoding === false) {
        $encoding = 'UTF-8';
      } else {
        $encoding = self::normalizeEncoding($encoding);
      }

      return \mb_substr($str, $start, $length, $encoding);
    }

    if (self::$support['iconv'] === true) {
      return (string)\grapheme_substr($str, $start, $length);
    }

    // fallback

    // split to array, and remove invalid characters
    $array = self::split($str);

    // extract relevant part, and join to make sting again
    return implode(array_slice($array, $start, $length));
  }