Code Duplication    Length = 5-6 lines in 2 locations

src/voku/helper/UTF8.php 2 locations

@@ 1567-1572 (lines=6) @@
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  public static function filter($var, $normalization_form = 4 /* n::NFC */, $leading_combining = '◌')
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  {
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    switch (gettype($var)) {
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      case 'array':
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        foreach ($var as $k => $v) {
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          /** @noinspection AlterInForeachInspection */
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          $var[$k] = self::filter($v, $normalization_form, $leading_combining);
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        }
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        break;
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      case 'object':
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        foreach ($var as $k => $v) {
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          $var->{$k} = self::filter($v, $normalization_form, $leading_combining);
@@ 1573-1577 (lines=5) @@
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          $var[$k] = self::filter($v, $normalization_form, $leading_combining);
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        }
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        break;
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      case 'object':
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        foreach ($var as $k => $v) {
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          $var->{$k} = self::filter($v, $normalization_form, $leading_combining);
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        }
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        break;
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      case 'string':
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        if (false !== strpos($var, "\r")) {