regular expressions for dummies

In this article, I've written 15 very useful regular expressions that Web developers should be able to collect into their own toolkit. Verify Domain NameVerify that a string is a valid domain name. $url = "http://komunitasweb.com/"; if (Preg_match (/^ http|https|ftp)://([A-z0-9][a-z0-9_-]* (?:. [ a-z0-9][a-z0-9_-]*) +):? (d+)/?/i ', $url)) { echo "Your URL is ok."; } else { echo "wrong URL.

Java ---- use regular expressions to match keywords in Java source code, java ---- Regular Expressions Write this blog to learn the regular expressions in Java systematically. Another reason is that there was a problem that could

Today at work encountered a point of trouble with the replacement, because the data class has been changed, the specific situation is this, the following code needs to be:Player.skilldata[i].nameTo be replaced by:Player.skillData.getSkillInfo (i). NameIn particular, [i] is changed to getskillinfo (i), but the problem is that there is too much to modify, 200+ to use, and the parentheses are not necessarily "I", may be a variety of forms (such as "index "," _myindex ", etc.), can not be a manual o

Today met a eliminate JS regular expression case-insensitive problem, online a search, found himself is a rookie. In JS inside//g, where G represents a global match, without this, it means that only one match will automatically end;/i/means that the matching process is case-insensitive. Oh.. This is useful in the process of parameter filtering. Copy Code code as follows: Dxycode=dxycode.replace (/ All said about this, naturally c

Python Regular Expressions use example sharing and python Regular Expressions As a concept, regular expressions are not unique to Python. However, regular

Introduction: Regular expressions are often used in various programs dealing with text processing. Mastery of regular expressions is a basic skill. This paper mainly describes the principle and application of regular expressions,

"[^a-za-z0-9_]". \xn Matches n, where n is the hexadecimal escape value. The hexadecimal escape value must be a determined two digits long. For example, "\x41" matches "A". "\x041" is equivalent to "\x041". ASCII encoding can be used in regular expressions. \num Matches num, where num is a positive integer. A reference to the match that was obtained. For example, "(.) \1 "ma

ProcessOn is an online collaborative graphics platform, providing users with the most powerful and easy-to-use drawing tools! It can be very easy to draw some things online, let yourself to understand the specific. Regular expressions Today's is just learning the simple use of regular. In the face of the HTML5 tag attributes, we can no longer have to learn Jav

Ajax and PHP regular expressions are used to verify the form, verification code, and ajax regular expressions. Pattern match: \: Escape character, for example, \ B escaped B ^: Regular Expression start symbol $: End symbol of the Regular