Lets say I want to replace a word saved in a string. I want to replace that word with the same word, that I have stored with the first letter as lower-case in a variable, adding html tags in the expression. I do care the case sensitivity in all letters but first.
So far: no problem.
But when I replace the expression, it always returns me the first letter with lower-case. And I wanted to replace all of them with their case. Example:
Subject: "<p>Lucky said that lucky is an unlucky word.</p>"
Word stored and searched: "lucky"
What I'd love to have: "<p><b>Lucky</b> said that <b>lucky</b> is an unlucky word.</p>"
That's what I've tried:
$word="lucky";
$result=preg_replace("/\b(?i)".substr($word,0,1)."(?-i)".substr($word,1)."\b/","<b>".$word."</b>","<p>Lucky said that lucky is an unlucky word.</p>");
It returns:
<p><b>lucky</b> said that <b>lucky</b> is an unlucky word.</p>
First lucky does not keep the "L".