RegExLib.com - The first Regular Expression Library on the Web!

Expression validating a octal string of any length.

Is used to evaluating domain names, none of the extras such as paths or protocols.

This ist the Expression for a happy smiley. It should find all the usual writings of the emotion icon :)

Match the full names of the four main characters of The Flintstones.

Password matching expression. Password must be at least 4 characters, no more than 8 characters, and must include at least one upper case letter, one lower case letter, and one numeric digit.

UK Phone Number Allows leading and trailing spaces and optional spaces after the dialing code. Initially the expression I posted was \s*0\d{4}\s*\d{6}\s*|\s*0\d{3}\s*\d{7}\s* But this didn't include optional brackets e.g. (01603) 123123 or phone numbers in a London format e.g. 0208 123 1234

Can be used to remove <SCRIPT language="JavaScript"> <!-- //--> </SCRIPT> from embeded javascript Should be used as case insensitive

It validates Indian Vehicle Registration Number

regex to validate unix device names (linux). useful for scripts using ifconfig or stuff

easy when you want to allow your users to post images, but in a controlled way. I used it like this (in php): $text = preg_replace("/(\[IMG\])(\S+?)(\[\/IMG\])/is", "<a href=\"\\2\" target=\"_blank\"><IMG SRC=\"\\2\" align=\"center\" height=\"100\" border=\"0\"></a>",$text); so whenever they use [img]http://www.foo.com/bleh.jpg[/img] it will be converted to <a href="http://www.foo.com/bleh.jpg" target="_blank"><IMG SRC="http://www.foo.com/bleh.jpg" align="center" height="100" border="0"></a> so you get a 100 pixels high picture, and when they click on it it opens in a new window... (to prevent users from posting huge pictures and stuff)

this pattern can find all lines of script in HTML code from open to close tag range

This regular expression will match either a 5 digit ZIP code or a ZIP+4 code formatted as 5 digits, a hyphen, and another 4 digits. Other than that, this is just a really really long description of a regular expression that I'm using to test how my front page will look in the case where very long expression descriptions are used.

Expression to match names and dis-allow any attempts to send evil characters. In particular, it tries to allow non-english names by allowing unicode characters.

UK Mobile phone regular expression. I usually run this against a telephone field to split out landlines and mobile numbers.

Match diferent styles for brazilian Phone number code. Only DDD (12), complete DDD (012), complete DDD + Telephony Company (0xx12) plus 3 or 4 digits (city code) plus 4 digits (phone number).

Postcode for Germany

Password expresion that requires one lower case letter, one upper case letter, one digit, 6-13 length, and no spaces. This is merely an extension of a previously posted expression by Steven Smith ([email protected]) . The no spaces is new.

Numeric and hyphen 5+4 ZIP code match for ZIP+4.

US zip code expression that disallows 00000 or 00000-0000 for either ZIP or ZIP+4. Great for web site validation.