/^\d{3}\-?\d{2}\-?\d{4}$/

^((([\w\+\-]+)(\.[\w\+\-]+)*)|(\"[^(\\|\")]{0,62}\"))@(([a-zA-Z0-9\-]+\.)+([a-zA-Z0-9]{2,})|\[?([1]?\d{1,2}|2[0-4]{1}\d{1}|25[0-5]{1})(\.([1]?\d{1,2}|2[0-4]{1}\d{1}|25[0-5]{1})){3}\]?)$

^[0-9]{5}(-[0-9]{4})?$

/(#|.)?[a-zA-Z0-9\_\,\.\:\# ]+[{]{1}[a-zA-Z0-9\n\r\s\:\;\#\(\)\\\/\"\'\-\_\.\,]*[}]{1}/

^[a-z0-9\._-]+@([a-z0-9][a-z0-9-]*[a-z0-9]\.)+([a-z]+\.)?([a-z]+)$

Find
(id=")(\w+)(\s)
Replace
$1$2_

function is_valid_email (email)
{
	return /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/.test(email);
}

RewriteCond %{HTTP_HOST}   !^www\.domain\.com [NC]
RewriteCond %{HTTP_HOST}   !^$
RewriteRule ^/(.*)         http://www.domain.com/$1 [L,R]

//replace all but links
/<(?!\/?a(?=>|\s.*>))\/?.*?>/g

//validate url
/^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \?=.-]*)*\/?$/

//Validate US phone number
/^(\+\d)*\s*(\(\d{3}\)\s*)*\d{3}(-{0,1}|\s{0,1})\d{2}(-{0,1}|\s{0,1})\d{2}$/

//Test if a password is strong
(?=^.{8,}$)((?=.*\d)|(?=.*\W+))(?![.\n])(?=.*[A-Z])(?=.*[a-z]).*$

//Validate US zip code
^[0-9]{5}(-[0-9]{4})?$

//Validate Canadian postal code
^[ABCEGHJ-NPRSTVXY]{1}[0-9]{1}[ABCEGHJ-NPRSTV-Z]{1}[ ]?[0-9]{1}[ABCEGHJ-NPRSTV-Z]{1}[0-9]{1}$

//Grab unclosed img tags
<img([^>]+)(\s*[^\/])>

//Find all CSS attributes
\s(?[a-zA-Z-]+)\s[:]{1}\s*(?[a-zA-Z0-9\s.#]+)[;]{1}

//Get code within <?php and ?>
<\?[php]*([^\?>]*)\?>