'.preg_replace($find, $replace, $string).'

<div class="mydiv">
<span>Test</span>
<div>
$('.mydiv').html("Hello!");

<div class="mydiv">
Hello!
<div>

function is_valid_email($email)
{
	if(preg_match("/[a-zA-Z0-9_-.+]+@[a-zA-Z0-9-]+.[a-zA-Z]+/", $email) > 0)
		return true;
	else
		return false;
}

function mdy($mid = "month", $did = "day", $yid = "year", $mval, $dval, $yval)
	{
		if(empty($mval)) $mval = date("m");
		if(empty($dval)) $dval = date("d");
		if(empty($yval)) $yval = date("Y");
		
		$months = array(1 => "January", 2 => "February", 3 => "March", 4 => "April", 5 => "May", 6 => "June", 7 => "July", 8 => "August", 9 => "September", 10 => "October", 11 => "November", 12 => "December");
		$out = "<select name='$mid' id='$mid'>";
		foreach($months as $val => $text)
			if($val == $mval) $out .= "<option value='$val' selected>$text</option>";
			else $out .= "<option value='$val'>$text</option>";
		$out .= "</select> ";

		$out .= "<select name='$did' id='$did'>";
		for($i = 1; $i <= 31; $i++)
			if($i == $dval) $out .= "<option value='$i' selected>$i</option>";
			else $out .= "<option value='$i'>$i</option>";
		$out .= "</select> ";

		$out .= "<select name='$yid' id='$yid'>";
		for($i = date("Y"); $i <= date("Y") + 2; $i++)
			if($i == $yval) $out.= "<option value='$i' selected>$i</option>";
			else $out.= "<option value='$i'>$i</option>";
		$out .= "</select>";
		
		return $out;
	}

// makeTeaser: makes a teaser for the number of words specified
function makeTeaser($text, $numWords) {
  $words = split(' ', $text);
  $words = array_chunk($words, $numWords);
  $output = implode(' ', $words[0]);
  $output = strip_tags($output) . '...';
  
  return $output;
}

<li>Alabama </li>
<li>Alaska </li>
<li>Arizona </li>
<li>Arkansas </li>
<li>California </li>
<li>Colorado </li>
<li>Connecticut </li>
<li>Delaware </li>
<li>Florida </li>
<li>Georgia </li>
<li>Hawaii </li>
<li>Idaho </li>
<li>Illinois </li>
<li>Indiana </li>
<li>Iowa </li>
<li>Kansas </li>
<li>Kentucky </li>
<li>Louisiana </li>
<li>Maine </li>
<li>Maryland </li>
<li>Massachusetts </li>
<li>Michigan </li>
<li>Minnesota </li>
<li>Mississippi </li>
<li>Missouri </li>
<li>Montana </li>
<li>Nebraska </li>
<li>Nevada </li>
<li>New Hampshire </li> 
<li>New Jersey </li>
<li>New Mexico </li>
<li>New York </li>
<li>North Carolina </li>
<li>North Dakota </li>
<li>Ohio </li>
<li>Oklahoma </li>
<li>Oregon </li>
<li>Pennsylvania </li>
<li>Rhode Island </li>
<li>South Carolina </li>
<li>South Dakota </li>
<li>Tennessee </li>
<li>Texas </li>
<li>Utah </li>
<li>Vermont </li>
<li>Virginia </li>
<li>Washington </li>
<li>West Virginia </li>
<li>Wisconsin </li>
<li>Wyoming </li>

perl -i.bak -pe "BEGIN { use HTML::Entities;} HTML::Entities::decode($_); " filename

body 
	{
	margin: 0px
	}

#horizon        
	{
	color: white;
	background-color: #0ff;
	text-align: center;
	position: absolute;
	top: 50%;
	left: 0px;
	width: 100%;
	height: 1px;
	overflow: visible;
	visibility: visible;
	display: block
	}

#content    
	{
	position: absolute;
	left: 50%;
	width: 250px; /* Overall width of div */
	height: 70px; /* Overall height of div */
	top: -35px; /* half of the overall height */
        margin-left: -125px; /* half of the overall width */
        visibility: visible
	}

CSS
 /* set millions of background images */
.rbroundbox { background: url(nt.gif) repeat; }
.rbtop div { background: url(tl.gif) no-repeat top left; }
.rbtop { background: url(tr.gif) no-repeat top right; }
.rbbot div { background: url(bl.gif) no-repeat bottom left; }
.rbbot { background: url(br.gif) no-repeat bottom right; }

/* height and width stuff, width not really nessisary. */
.rbtop div, .rbtop, .rbbot div, .rbbot {
width: 100%;
height: 7px;
font-size: 1px;
}
.rbcontent { margin: 0 7px; }
.rbroundbox { width: 50%; margin: 1em auto; }



HTML

<div class="rbroundbox">
	<div class="rbtop"><div></div></div>
		<div class="rbcontent">
			<p>Lorem ipsum dolor sit amet, 
			consectetuer adipiscing elit. Duis 
			ornare ultricies libero. Donec 
			fringilla, eros at dapibus fermentum,
			tellus tellus auctor erat, vitae porta 
			magna libero sed libero. Mauris sed leo. 
			Aliquam aliquam. Maecenas vestibulum.</p>
		</div><!-- /rbcontent -->
	<div class="rbbot"><div></div></div>
</div><!-- /rbroundbox -->