删除以分号分隔的字符串中的重复单词

Question

I have a long string in this format:

hello; world; this; is; a; string; hello; of; some; words;

It's semicolon + space separated. I need to remove all duplicate words in the string. The resultant string should look like this (with the second hello; removed):

hello; world; this; is; a; string; of; some; words;

How would I do this?

Answer 1

Here's an example in PHP:

$string = "hello; world; this; is; a; string; hello; of; some; words;";
$string = implode("; ", array_unique(explode("; ", $string)));

string will contain the new string: "hello; world; this; is; a; string; of; some; words;". If you want a string like this: "hello world this is a string of some words" remove "; " from the implode parameters

EDIT: as requested by vihan1086, I have posted my original code below:

$string = "hello; world; this; is; a; string; hello; of; some; words;";
$matches = array_unique(explode("; ", $string))
$string = implode("; ", $matches);