Code Duplication    Length = 9-9 lines in 2 locations

src/Handlers/Str.php 2 locations

@@ 17-25 (lines=9) @@
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     *
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     * @return bool|string
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     */
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    public static function pop(string &$str, string $encoding = null)
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    {
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        $encoding = $encoding ?: mb_internal_encoding();
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        $last = mb_substr($str, -1, null, $encoding);
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        $str = mb_substr($str, 0, -1, $encoding);
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        return $last;
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    }
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    /**
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     * Shift a character off the beginning of string
@@ 35-43 (lines=9) @@
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     *
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     * @return bool|string
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     */
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    public static function shift(string &$str, string $encoding = null)
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    {
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        $encoding = $encoding ?: mb_internal_encoding();
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        $first = mb_substr($str, 0, 1, $encoding);
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        $str = mb_substr($str, 1, null, $encoding);
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        return $first;
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    }
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    /**
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     * Cut substring from the beginning of string