返回第一次出现字符串之前和之后的单词

Question

I have a body of text returned from a search query, lets call it $body. Now, what I want to do is for the script to find the first occurrence of the search query, $query. I know I can find this first occurrence this with strripos.

Once found, I want the script to return a couple of words before the first occurrence of the string as well as a few words after the end of the first occurrence.

Essentially I'm trying to do what Google does with it's search results.

Any ideas on where I should start? My issue is that I keep returning partial words.

Answer 1

You could:

$words = explode(" ", $body);

Creating an array of al the words in $body.

$index  = array_search($query, $words);  
$string = $words[$index - 1]." ".$words[$index]." ".$words[$index + 1];

But you would get into trouble if the query consist out of more than 1 word.

explode - array_search