SE non ho capito male cosa vuoi... dal manuale php
Codice PHP:
With reference to the google type searches above ...
This is a case insensitive replace....
This code below will highlight the "found" text in red and return the string unaltered (in terms of case).
<?php
function turn_red($haystack,$needle)
{
$h=strtoupper($haystack);
$n=strtoupper($needle);
$pos=strpos($h,$n);
if ($pos !== false)
{
$var=substr($haystack,0,$pos)."<font color='red'>".substr($haystack,$pos,strlen($needle))."</font>";
$var.=substr($haystack,($pos+strlen($needle)));
$haystack=$var;
}
return $haystack;
}
?>