PHP Highlight Input Search Keyword - php

Question

I want to highlight every $searchkey results.
I tried other solutions but they don't work with a search engine.
Results appear in a table.
I want every appearance of the keyword to be highlighted.
Thanks for your help!
<?php
$dbhost = 'xxx';
$username = 'xxx';
$password = 'xxx';
mysql_connect("$dbhost" , "$username", "$password" );
mysql_select_db("xxx") or die("could not find the database!");
$output = '';
if(isset($_GET['search']))
{
$searchkey = $_GET['search'];
$query = mysql_query("SELECT * FROM xxx WHERE email LIKE '%$searchkey%' ") or die("Could not search");
$count = mysql_num_rows($query);
if ($count == 0)
{
$output = 'There was no search results !' ;
}
else
{
echo '<table class="table table-striped table-bordered table-hover">';
echo "<tr><th>email</th><th>hashkey</th></tr>";
while ($row = mysql_fetch_array($query))
{
$email = $row['email'];
$hashkey = $row['hashkey'];
echo "<tr><td>";
echo $email;
echo "</td><td>";
echo $hashkey;
echo "</td></tr>";
}
echo '<div>'."$count results were found for '$searchkey'.".'</div>'.'</br>';
}
echo "</table>";
$searchkey= $words;
}
?>

Answer 1

You can use Regular Expression in PHP to do this. In this code I use <strong> tag, you can replace it as you want.
while ($row = mysql_fetch_array($query))
{
$email = preg_replace('/(' . $searchkey . ')/s', '<strong>\1</strong>', $row["email"]);
$hashkey = $row['hashkey'];
echo "<tr><td>";
echo $email;
echo "</td><td>";
echo $hashkey;
echo "</td></tr>";
}