Regular Expression !!

[dannymm]

Hi Guys,

Can somebody tell me what would be the regular expression for the following problem ...

my sentence is "XYZ is a very good actor, he has acted very well in movie ABC"

Now i want to highlight all those words which starts from "act".

i,e my sentence now would be

xyz is a very good <font color=Red>actor</font>, he has <font color=Red>acted</font> very well in movie ABC.

This is urgent ....

Regards,
Danny !!

[fandelem]

here is a function i just coded.

the last two parameters are optional, and they are basically what you want your text to be underlined as.

/
Highlights all occurances within $string
note: $words is an array
you can change a string into an array easily:
$keywords = array();
$keywords[] = trim($searchwords);
highlight before/after are optional (defaults to bolding)
Example: highlight_text($keywords, $quote,
"<font style =\"text-decoration: none; color: #CC3333; background: #ffa; \">", "</font>")
*/
function highlight_text( $words, $string,
$highlight_before = "<b>", $highlight_after = "</b>" )
{

 $tempquote = "";
 $changed = 0;

 /* tstring is what we'll be working with */
 $tstring = $string;
 /* loop through each search word */
 for ($i = 0; $i < count($words); $i++ )
 {
   $newstring = "";
   while ( ($pos = strpos($tstring, $words[$i])) != false )
   {
     /* hold everything up to the match */
     $posbehind = substr($tstring, 0, $pos);
     /* and everything after the word.. */
     $posahead = substr($tstring, $pos+strlen($words[$i]));
     /* now concatenate */
     $newstring .= $posbehind . $highlight_before . $words[$i] . $highlight_after;
     /* update tstring */
     $tstring = substr($tstring, $pos+strlen($words[$i]));
     $changed = 1;
     if ( strpos($posahead, $words[$i]) === false )
       $newstring .= $posahead;
   }
   /* prep for next word */
   $tstring = $newstring;

}

if ( $changed == 0 )
return $string;

 return $newstring;

}

cheers,

kyle

[fandelem]

ok, this should work better
(phpbuilder chomped the font tags )

if it doesn't, use common sense as
to where to change :0

-kyle

/
Highlights all occurances within $string
note: $words is an array
you can change a string into an array easily:
$keywords = array();
$keywords[] = trim($searchwords);
highlight before/after are optional (defaults to bolding)
Example: highlight_text($keywords, $quote,
"&lt;font style =\"text-decoration: none; color: #CC3333; background: #ffa; \">", "&lt;/font>")
*/
function highlight_text( $words, $string,
$highlight_before = "&lt;b>", $highlight_after = "&lt;/b>" )
{

 $tempquote = "";
 $changed = 0;

 /* tstring is what we'll be working with */
 $tstring = $string;
 /* loop through each search word */
 for ($i = 0; $i < count($words); $i++ )
 {
   $newstring = "";
   while ( ($pos = strpos($tstring, $words[$i])) != false )
   {
     /* hold everything up to the match */
     $posbehind = substr($tstring, 0, $pos);
     /* and everything after the word.. */
     $posahead = substr($tstring, $pos+strlen($words[$i]));
     /* now concatenate */
     $newstring .= $posbehind . $highlight_before . $words[$i] . $highlight_after;
     /* update tstring */
     $tstring = substr($tstring, $pos+strlen($words[$i]));
     $changed = 1;
     if ( strpos($posahead, $words[$i]) === false )
       $newstring .= $posahead;
   }
   /* prep for next word */
   $tstring = $newstring;

}

if ( $changed == 0 )
return $string;

 return $newstring;

}