How to convert raw PHP to laravel?

i need some help on how to convert a raw php code to laravel.

$word = ['0' => 'how', '1' => 'you']; $output = array(); $word = mysqli_real_escape_string($mysqli, $word); $words = mysqli_query($mysqli, "SELECT word FROM dictionary WHERE SUBSTRING(word, 1, 1) ='".mysqli_real_escape_string($mysqli, substr($word, 0, 1))."' "); while(($words_row = mysqli_fetch_assoc($words)) !== false && in_array($word, $words_row) == false){ similar_text($word, $words_row['word'], $percent); if($percent >= 75){ $output[] = $words_row['word']; } if($words_row['word'] == null){ break; } }