clean_content is working fine but for some reason word_count is not working , it returns 0. i was wondering if someone could help me!?

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`class read_time_counter`
`{`
`public static function bmb_read_time_counter(string $content, string $wpm = ‘300’) :string`
`{`
`$clean_content = strip_tags(strip_shortcodes($content));`
`$word_count = str_word_count($clean_content);`
`return ceil($word_count / $wpm);`
`}`
`}`

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