如何比较n个多个句子在数组中并使用php使用array_intersect获取常用单词并将常用单词存储在数组中

Question

Hi friends am trying to compare n sentences in an array and get the common words which are present in more than one sentence. Here is sample

 $cars=("hello how","hello when","when you came",........,n sentences);

array_intersect is used to compare 2 or 3 arrays which have exactly common words in all the three can anyone help me with these

Answer 1

$cars = array_filter(
            array_count_values(
                   array_merge(
                        ...array_map(
                              function($x) { return array_unique(explode(' ', $x));},
                              $cars))), 
            function($x) { return $x > 1; });
print_r($cars); 

Step by step

1. Explode strings and save only unique words
2. Merge all arrays
3. Count frequency for each word
4. Get words that exist more than one time

demo