Search code examples
phpregexstringsubstringtext-extraction

Get unknown word that follows a specific word

I need to extract an unknown word that immediately follows a word then a comma. More preceisely, I want to get the word that comes after post followed by a comma then a space.

Sample string 1:

admin wrote a new post, FIRE 2 days, 2 hours ago

Sample string 2:

admin posted an update 2 days, 3 hours ago

Only the first sample string qualifies and the word FIRE should be returned.

Solution

  • Using Regular Expression

    $string="admin wrote a new post, FIRE 2 days, 2 hours ago";
$result=preg_split('/post,/',$string);
if(count($result)>1){
$result_split=explode(' ',$result[1]);
print_r($result_split[1]);
}

    This one outputs FIRE

    LIVE DEMO

    Another way

    $string="admin wrote a new post, FIRE 2 days, 2 hours ago";
$result=preg_match_all('/(?<=(post,))(\s\w*)/',$string,$matches);
print_r($matches[0]);

    Live Demo