Learn to use PHP to change character sequences into emoticons or icons by using the str_replace function

<?php
$db_str = "Show me some <3 right now. It is raining
today [umbr], that gives me peace [peace].";
echo $db_str;
echo "<hr />";
$chars = array("<3", "[peace]", "[umbr]");
$icons = array("&#10084;", "&#9774;", "&#9730;");
$new_str = str_replace($chars,$icons,$db_str);
echo $new_str;
?>

Online Demo