help about string matching

hi all
I have following code to search a string from a big string. I am taking both ones from users. but i have a problem that i want to bold the match string in answer. For example...

following code give answer that it show the string where it is matched & also show rest of string as well. I want to bold the matched string & rest of string in normal view..

Any suggestion will be appreciated. Following code is good u can check.
Thanks




<form method="post" action="dublicate_check.php">

<span>Enter Data from Search</span></br>

<textarea name="textarea1" style="resize:none; width:550; height:100;" >
</textarea></br>
<span>Enter Data to Search</span></br>
<textarea name="textarea2" style="resize:none; width:550; height:100;" ></textarea></br>
<input type="submit" value="submit" />
</form>

<?php

if(isset($_POST["textarea1"]) and $_POST["textarea1"] !="")
{
if(isset($_POST["textarea2"]) and $_POST["textarea2"] !="" ){

$v=$_POST["textarea1"];
$serac=$_POST["textarea2"];


$anc=strstr($v,$serac);




echo "<b>Data from Searched</b></br></br></br>".$v."</br></br>";
echo "<b>Data which is Searched</b></br></br></br></b>".$serac."</br></br>";

echo "<b>Here is dublicate string with rest of one</b> <br><br> ".$anc ."</br>";







}//end of if statement
}//end of if statement
?>

 

here you go

<?php

$outputtext = str_replace($serac,'<b>'.$serac.'</b>',$v);


?>

PHP:

 

Thanks i got my answer... it works