preg_replace to exclude PHP

Question

Im using preg_replace to replace keywords in text with a href tag, my regex is working awesome, right now my code is:

$newstring2 = preg_replace(\"/\\p{L}*?\         


        

Answer 1

How about this with negative lookahead. Regex

Explanation: capture all the keyword that is called text and replace with it some link but don't capture those keywords that have after it.

$re = '/(text)(?!<\/a>)/m';
$str = 'this is sample text about something what is text.

this is sample text about something what is text.';
$subst = '$1';

$result = preg_replace($re, $subst, $str);

echo $result;

Output:

this is sample text about something what is text. 

this is sample text about something what is text.

DEMO: https://3v4l.org/DVTB1